 |
|
| Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
| Reply |
|
|
|
LinkBack | Thread Tools | Display Modes |
|
#1
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
LG hombot robot vacuum cleaner disassembly
LG hombot robot vacuum cleaner disassembly
I got the open source software from LG, but no reply on my request for a service manual, and could not find out how to open it without damaging the plastic. Anyways It started screaming error messages at me, and stopped working altogether. Now that is a guarantee case, but sending it back, paying for return shipment, just to get an other defective one back? So, after it kept screaming and the whole neighborhood was now looking what was going on 'HOMEBOT CANNOT CONTINUE THERE IS A PROBLEM WITH THE SUCTION MOTOR' I wanted to shoot it, I remember Elvis once shot a TV set.. anyways, wanted to see what was inside, wanted to re-design the piece of **** (do not buy this crap!!!) so as it was not working anyways, decided to open it the smart and fast way, dropped it from 1.5 meters on a concrete floor. that did it. Red (warning color!!!) cover flipped of, and there were a couple of real screws exposed. removed these and had a look inside. This is the main board: http://panteltje.com/pub/LG_hombot_m...B_IMG_4432.JPG The huge white 'chip' in the middle is from these guys: http://www.minfinity.com/eng/page.ph...=1&sub=1&tab=2 The processor or whatever it is says ST on it The 'suction motor drive' detail is he http://panteltje.com/pub/LG_hombot_m...__IMG_4434.JPG nothing wrong with the motor, this seems just a MOSFET, motor in drain, flyback protection diode D21, and sense resistor in the source (R100), and mystery component BD16, there are several BDxxx in its motor drive circuits, no idea what it is. The sense resistor seems bad soldered, maybe the solder connection drops too much. Will put that motor on the lab supply later (just a freaking simple permanent magnet type DC motor). An other mystery component, could be camera, there are supposed to be 2, one looking up and one down, would have been more clever if one was looking were it was going, my plants for example!!, idiots. http://panteltje.com/pub/LG_hombot_m...t_IMG_4435.JPG Anyways maybe the repair group likes this info, the top red bezel is fixed with click clack plastic hooks, the 'entrance': http://panteltje.com/pub/LG_hombot_e...r_IMG_4436.JPG http://panteltje.com/pub/LG_hombot_e...s_IMG_4438.JPG Seems a hobbyist design on a bad day by just arrived interns. 'Look we have a robotic vacuum cleaner to.' Its hight is too high (cannot get under anything). It get stuck on everything (carpet what not). I throws over plants. It scream swith a very loud female voice all the time (into the distortion), even if you activate 'mute' it screams 'MUTE HAS BEEN ACTIVATED' Morons!! And it destroys any cabling you may have, pulled out the wires from the speakers, grabbed an ethernet cable and pulled it all the way, just pure luck it did not pull the camera connected to it on the floor.. My first LG product, and absolutely and 100% certain my last even if I got one or ten for free. Wrote it of, see if I can do better some day, with the parts. There marketing is good, maybe they write their own reviews like Samsung. |
|
#2
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Thu, 10 Apr 2014 14:33:07 GMT, Jan Panteltje
wrote: LG hombot robot vacuum cleaner disassembly I got the open source software from LG, but no reply on my request for a service manual, and could not find out how to open it without damaging the plastic. Anyways It started screaming error messages at me, and stopped working altogether. Now that is a guarantee case, but sending it back, paying for return shipment, just to get an other defective one back? So, after it kept screaming and the whole neighborhood was now looking what was going on 'HOMEBOT CANNOT CONTINUE THERE IS A PROBLEM WITH THE SUCTION MOTOR' I wanted to shoot it, I remember Elvis once shot a TV set.. anyways, wanted to see what was inside, wanted to re-design the piece of **** (do not buy this crap!!!) so as it was not working anyways, decided to open it the smart and fast way, dropped it from 1.5 meters on a concrete floor. that did it. Red (warning color!!!) cover flipped of, and there were a couple of real screws exposed. removed these and had a look inside. This is the main board: http://panteltje.com/pub/LG_hombot_m...B_IMG_4432.JPG The huge white 'chip' in the middle is from these guys: http://www.minfinity.com/eng/page.ph...=1&sub=1&tab=2 The processor or whatever it is says ST on it The 'suction motor drive' detail is he http://panteltje.com/pub/LG_hombot_m...__IMG_4434.JPG nothing wrong with the motor, this seems just a MOSFET, motor in drain, flyback protection diode D21, and sense resistor in the source (R100), and mystery component BD16, there are several BDxxx in its motor drive circuits, no idea what it is. The sense resistor seems bad soldered, maybe the solder connection drops too much. Will put that motor on the lab supply later (just a freaking simple permanent magnet type DC motor). An other mystery component, could be camera, there are supposed to be 2, one looking up and one down, would have been more clever if one was looking were it was going, my plants for example!!, idiots. http://panteltje.com/pub/LG_hombot_m...t_IMG_4435.JPG Anyways maybe the repair group likes this info, the top red bezel is fixed with click clack plastic hooks, the 'entrance': http://panteltje.com/pub/LG_hombot_e...r_IMG_4436.JPG http://panteltje.com/pub/LG_hombot_e...s_IMG_4438.JPG Seems a hobbyist design on a bad day by just arrived interns. 'Look we have a robotic vacuum cleaner to.' Its hight is too high (cannot get under anything). It get stuck on everything (carpet what not). I throws over plants. It scream swith a very loud female voice all the time (into the distortion), even if you activate 'mute' it screams 'MUTE HAS BEEN ACTIVATED' Morons!! And it destroys any cabling you may have, pulled out the wires from the speakers, grabbed an ethernet cable and pulled it all the way, just pure luck it did not pull the camera connected to it on the floor.. My first LG product, and absolutely and 100% certain my last even if I got one or ten for free. Wrote it of, see if I can do better some day, with the parts. There marketing is good, maybe they write their own reviews like Samsung. Get used to it. Everything nowadays has a computer in it. Tennis rackets. Stoves. Refrigerators. Telephones. Toilets. Imagine when everything is online to "the internet of things." You'll spend most of your life reprogramming, debuggung, repairing, or returning every lamp, faucet, thermostat, and toaster oven in your house. Upgrade that blender code from 0.12.313b 3.19.501a to fix some stack overflow vulnerability, when you'd rather be making margueritas. We bought a new kitchen stove ("gas cooker" in some places) and I wanted one without digital controls. The computerized ones are everywhere and cost about $500. The ones without computers are in the $2000 to $5000 range. Can you imagine a worse environment for cheap electronics than in the top of a stove, or a dishwasher? We got an NXR for about $2K. I also ripped out the programmable thermostat in the cabin and replaced it with an analog one. Guests were always leaving the old one in all sorts of bizarre modes and states. Our Orec vacuum cleaner must be close to 10 years old and works fine. It needs a new belt maybe once a year, but replacement is obvious. Don't get me started about the controls on my Audi. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation |
|
#3
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On a sunny day (Thu, 10 Apr 2014 08:47:04 -0700) it happened John Larkin
wrote in : Get used to it. Everything nowadays has a computer in it. Tennis rackets. Stoves. Refrigerators. Telephones. Toilets. Imagine when everything is online to "the internet of things." You'll spend most of your life reprogramming, debuggung, repairing, or returning every lamp, faucet, thermostat, and toaster oven in your house. Upgrade that blender code from 0.12.313b 3.19.501a to fix some stack overflow vulnerability, when you'd rather be making margueritas. We bought a new kitchen stove ("gas cooker" in some places) and I wanted one without digital controls. The computerized ones are everywhere and cost about $500. The ones without computers are in the $2000 to $5000 range. Can you imagine a worse environment for cheap electronics than in the top of a stove, or a dishwasher? We got an NXR for about $2K. I also ripped out the programmable thermostat in the cabin and replaced it with an analog one. Guests were always leaving the old one in all sorts of bizarre modes and states. Our Orec vacuum cleaner must be close to 10 years old and works fine. It needs a new belt maybe once a year, but replacement is obvious. Don't get me started about the controls on my Audi. Yea, well I also bought a DirtDevil spider, for a fraction of the money the LG rombot costs. It has (AFAIK) no computah, no remote, and no cameras, it has a bumper sensor with micro switches it seems. I did great cleaning under the bench, TV table, its only 7 cm high. I does not scream, complain, it jumps over cables, is not stopped by low hanging curtains like the LG hombot, did I mention that LG hombot cannot even find its own charging station? The Spider you just need to plug in yourself to charge. It probably has some micro, but it works so good there there is no need to investigate it, it just works. It sucks less than the LG, both for real and figuratively speaking :-) Never Repair Something That Works. |
|
#4
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Thu, 10 Apr 2014 16:05:30 GMT, Jan Panteltje
wrote: On a sunny day (Thu, 10 Apr 2014 08:47:04 -0700) it happened John Larkin wrote in : Get used to it. Everything nowadays has a computer in it. Tennis rackets. Stoves. Refrigerators. Telephones. Toilets. Imagine when everything is online to "the internet of things." You'll spend most of your life reprogramming, debuggung, repairing, or returning every lamp, faucet, thermostat, and toaster oven in your house. Upgrade that blender code from 0.12.313b 3.19.501a to fix some stack overflow vulnerability, when you'd rather be making margueritas. We bought a new kitchen stove ("gas cooker" in some places) and I wanted one without digital controls. The computerized ones are everywhere and cost about $500. The ones without computers are in the $2000 to $5000 range. Can you imagine a worse environment for cheap electronics than in the top of a stove, or a dishwasher? We got an NXR for about $2K. I also ripped out the programmable thermostat in the cabin and replaced it with an analog one. Guests were always leaving the old one in all sorts of bizarre modes and states. Our Orec vacuum cleaner must be close to 10 years old and works fine. It needs a new belt maybe once a year, but replacement is obvious. Don't get me started about the controls on my Audi. Yea, well I also bought a DirtDevil spider, for a fraction of the money the LG rombot costs. It has (AFAIK) no computah, no remote, and no cameras, it has a bumper sensor with micro switches it seems. I did great cleaning under the bench, TV table, its only 7 cm high. I does not scream, complain, it jumps over cables, is not stopped by low hanging curtains like the LG hombot, did I mention that LG hombot cannot even find its own charging station? The Spider you just need to plug in yourself to charge. It probably has some micro, but it works so good there there is no need to investigate it, it just works. It sucks less than the LG, both for real and figuratively speaking :-) Never Repair Something That Works. I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation |
|
#5
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Thu, 10 Apr 2014 09:16:12 -0700, John Larkin
wrote: On Thu, 10 Apr 2014 16:05:30 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 08:47:04 -0700) it happened John Larkin wrote in : Get used to it. Everything nowadays has a computer in it. Tennis rackets. Stoves. Refrigerators. Telephones. Toilets. Imagine when everything is online to "the internet of things." You'll spend most of your life reprogramming, debuggung, repairing, or returning every lamp, faucet, thermostat, and toaster oven in your house. Upgrade that blender code from 0.12.313b 3.19.501a to fix some stack overflow vulnerability, when you'd rather be making margueritas. We bought a new kitchen stove ("gas cooker" in some places) and I wanted one without digital controls. The computerized ones are everywhere and cost about $500. The ones without computers are in the $2000 to $5000 range. Can you imagine a worse environment for cheap electronics than in the top of a stove, or a dishwasher? We got an NXR for about $2K. I also ripped out the programmable thermostat in the cabin and replaced it with an analog one. Guests were always leaving the old one in all sorts of bizarre modes and states. Our Orec vacuum cleaner must be close to 10 years old and works fine. It needs a new belt maybe once a year, but replacement is obvious. Don't get me started about the controls on my Audi. Yea, well I also bought a DirtDevil spider, for a fraction of the money the LG rombot costs. It has (AFAIK) no computah, no remote, and no cameras, it has a bumper sensor with micro switches it seems. I did great cleaning under the bench, TV table, its only 7 cm high. I does not scream, complain, it jumps over cables, is not stopped by low hanging curtains like the LG hombot, did I mention that LG hombot cannot even find its own charging station? The Spider you just need to plug in yourself to charge. It probably has some micro, but it works so good there there is no need to investigate it, it just works. It sucks less than the LG, both for real and figuratively speaking :-) Never Repair Something That Works. I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. Try some *decent* LiIon tools. Great stuff. |
|
#6
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin
wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? |
|
#7
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
|
|
#8
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
In sci.electronics.design Jan Panteltje wrote:
LG hombot robot vacuum cleaner disassembly I got the open source software from LG, but no reply on my request for a service manual, and could not find out how to open it without damaging the plastic. Anyways It started screaming error messages at me, and stopped working altogether. Now that is a guarantee case, but sending it back, paying for return shipment, just to get an other defective one back? So, after it kept screaming and the whole neighborhood was now looking what was going on 'HOMEBOT CANNOT CONTINUE THERE IS A PROBLEM WITH THE SUCTION MOTOR' I wanted to shoot it, I remember Elvis once shot a TV set.. anyways, wanted to see what was inside, wanted to re-design the piece of **** (do not buy this crap!!!) so as it was not working anyways, decided to open it the smart and fast way, dropped it from 1.5 meters on a concrete floor. that did it. Red (warning color!!!) cover flipped of, and there were a couple of real screws exposed. removed these and had a look inside. This is the main board: http://panteltje.com/pub/LG_hombot_m...B_IMG_4432.JPG looks vaguely like an old CD player or something. The huge white 'chip' in the middle is from these guys: http://www.minfinity.com/eng/page.ph...=1&sub=1&tab=2 The processor or whatever it is says ST on it The 'suction motor drive' detail is he http://panteltje.com/pub/LG_hombot_m...__IMG_4434.JPG nothing wrong with the motor, this seems just a MOSFET, motor in drain, flyback protection diode D21, and sense resistor in the source (R100), and mystery component BD16, there are several BDxxx in its motor drive circuits, no idea what it is. The sense resistor seems bad soldered, maybe the solder connection drops too much. Will put that motor on the lab supply later (just a freaking simple permanent magnet type DC motor). An other mystery component, could be camera, there are supposed to be 2, one looking up and one down, would have been more clever if one was looking were it was going, my plants for example!!, idiots. http://panteltje.com/pub/LG_hombot_m...t_IMG_4435.JPG There must be hundreds of screws in that thing. Anyways maybe the repair group likes this info, the top red bezel is fixed with click clack plastic hooks, the 'entrance': http://panteltje.com/pub/LG_hombot_e...r_IMG_4436.JPG http://panteltje.com/pub/LG_hombot_e...s_IMG_4438.JPG Seems a hobbyist design on a bad day by just arrived interns. 'Look we have a robotic vacuum cleaner to.' Its hight is too high (cannot get under anything). It get stuck on everything (carpet what not). I throws over plants. It scream swith a very loud female voice all the time (into the distortion), even if you activate 'mute' it screams 'MUTE HAS BEEN ACTIVATED' Morons!! horrible. And it destroys any cabling you may have, pulled out the wires from the speakers, grabbed an ethernet cable and pulled it all the way, just pure luck it did not pull the camera connected to it on the floor.. My first LG product, and absolutely and 100% certain my last even if I got one or ten for free. Wrote it of, see if I can do better some day, with the parts. There marketing is good, maybe they write their own reviews like Samsung. haha |
|
#9
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje
wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. -- John Larkin Highland Technology, Inc jlarkin att highlandtechnology dott com http://www.highlandtechnology.com |
|
#11
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin
wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). |
|
#12
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Thu, 10 Apr 2014 18:37:39 -0400, wrote:
On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. -- John Larkin Highland Technology, Inc jlarkin att highlandtechnology dott com http://www.highlandtechnology.com |
|
#13
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On 10/04/14 22:33, Jan Panteltje wrote:
LG hombot robot vacuum cleaner disassembly I got the open source software from LG, but no reply on my request for a service manual, and could not find out how to open it without damaging the plastic. Anyways It started screaming error messages at me, and stopped working altogether. Now that is a guarantee case, but sending it back, paying for return shipment, just to get an other defective one back? So, after it kept screaming and the whole neighborhood was now looking what was going on 'HOMEBOT CANNOT CONTINUE THERE IS A PROBLEM WITH THE SUCTION MOTOR' I wanted to shoot it, I remember Elvis once shot a TV set.. anyways, wanted to see what was inside, wanted to re-design the piece of **** (do not buy this crap!!!) so as it was not working anyways, decided to open it the smart and fast way, dropped it from 1.5 meters on a concrete floor. that did it. Red (warning color!!!) cover flipped of, and there were a couple of real screws exposed. removed these and had a look inside. This is the main board: http://panteltje.com/pub/LG_hombot_m...B_IMG_4432.JPG The huge white 'chip' in the middle is from these guys: http://www.minfinity.com/eng/page.ph...=1&sub=1&tab=2 The processor or whatever it is says ST on it The 'suction motor drive' detail is he http://panteltje.com/pub/LG_hombot_m...__IMG_4434.JPG nothing wrong with the motor, this seems just a MOSFET, motor in drain, flyback protection diode D21, and sense resistor in the source (R100), and mystery component BD16, there are several BDxxx in its motor drive circuits, no idea what it is. The sense resistor seems bad soldered, maybe the solder connection drops too much. Will put that motor on the lab supply later (just a freaking simple permanent magnet type DC motor). An other mystery component, could be camera, there are supposed to be 2, one looking up and one down, would have been more clever if one was looking were it was going, my plants for example!!, idiots. http://panteltje.com/pub/LG_hombot_m...t_IMG_4435.JPG Anyways maybe the repair group likes this info, the top red bezel is fixed with click clack plastic hooks, the 'entrance': http://panteltje.com/pub/LG_hombot_e...r_IMG_4436.JPG http://panteltje.com/pub/LG_hombot_e...s_IMG_4438.JPG Seems a hobbyist design on a bad day by just arrived interns. 'Look we have a robotic vacuum cleaner to.' Its hight is too high (cannot get under anything). It get stuck on everything (carpet what not). I throws over plants. It scream swith a very loud female voice all the time (into the distortion), even if you activate 'mute' it screams 'MUTE HAS BEEN ACTIVATED' Morons!! And it destroys any cabling you may have, pulled out the wires from the speakers, grabbed an ethernet cable and pulled it all the way, just pure luck it did not pull the camera connected to it on the floor.. My first LG product, and absolutely and 100% certain my last even if I got one or ten for free. Wrote it of, see if I can do better some day, with the parts. There marketing is good, maybe they write their own reviews like Samsung. Well I married my room cleaner. The interface can be quirky but as a multifunction unit the versatility can't be beat. That said it will not work 24/7 but can easily find it's charging device hwen required. |
|
#14
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Thu, 10 Apr 2014 16:42:37 -0700, John Larkin
wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Utter nonsense. Show me one with a 14GA cord. Better yet, put a meter on one and show me where it's drawing anything close to 500W, in use. They may draw 15A at stall (doubtful), but it'll be an interesting ride if you do stall one. A stalled saw isn't very useful, either. A battery powered circular saw isn't at all useless (I have two) but it's not a replacement for a corded saw. Drills and drivers are another matter. I only have one corded drill anymore (and over a dozen cordless drivers and drills), a 1/2" hammer drill that I've never used. |
|
#15
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On a sunny day (Thu, 10 Apr 2014 15:07:38 -0700) it happened John Larkin
wrote in : On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. Yes, true, at 100% charge /discharge about 350 times or so on a lipo. I have VARTA datasheet somewhere .. for the LP523450LP I am using (3.7 V 1Ah single cell): 300 cycles at 80% capacity 500 cycles at 70% capacity 2 years... Cellphones do not always discharge 100%, had my Nokia for at least 3 years, charged every day. Ther are bad batteries too, some die after a week. |
|
#16
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On a sunny day (Thu, 10 Apr 2014 18:35:53 -0400) it happened
wrote in : But limited number of charge discharge cycles lipos have, John is right about that (350 times perhaps). *Easily* 500 cycles and more like 1000. Because the self-discharge is so small, that's generally a long time. See my reply to Jonhn, about the Varta datasheet Or google Varta LP523450DL lithium ion. |
|
#17
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin
wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com |
|
#18
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany
wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) |
|
#19
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Fri, 11 Apr 2014 18:49:37 -0400, wrote:
On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin m wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? -- John Larkin Highland Technology, Inc jlarkin att highlandtechnology dott com http://www.highlandtechnology.com |
|
#20
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin
wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. |
|
#21
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Fri, 11 Apr 2014 19:33:42 -0400, wrote:
On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin m wrote in m: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. Not much different from cutting a 2x4. Sure, keep body parts away from the blade, in either case. -- John Larkin Highland Technology, Inc jlarkin att highlandtechnology dott com http://www.highlandtechnology.com |
|
#22
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Fri, 11 Apr 2014 17:03:46 -0700, John Larkin
wrote: On Fri, 11 Apr 2014 19:33:42 -0400, wrote: On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin om wrote in om: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. Not much different from cutting a 2x4. Sure, keep body parts away from the blade, in either case. You're *wrong*. *PLEASE* leave the power tools to someone who knows how to use them. You're dangerous. |
|
#23
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Fri, 11 Apr 2014 20:07:12 -0400, wrote:
On Fri, 11 Apr 2014 17:03:46 -0700, John Larkin wrote: On Fri, 11 Apr 2014 19:33:42 -0400, wrote: On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin jjlarkin@highNOTlandTHIStechnologyPART. com wrote in asgdk9d29q9ds74218i3r5me51loi12pm5@4ax. com: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. Not much different from cutting a 2x4. Sure, keep body parts away from the blade, in either case. You're *wrong*. *PLEASE* leave the power tools to someone who knows how to use them. You're dangerous. I have all 10 of my fingers, which is more than a lot of professional woodworkers can say. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation |
|
#24
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Fri, 11 Apr 2014 18:49:37 -0400, the renowned wrote:
Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) The branches were on the ground. Just cutting them into 3' pieces for bundling so the city would haul them off. I'm not getting up on a ladder with a cordless circular saw. ;-) I don't have a gas chain saw (just an antique electric one without guards). The Hitachi version of a sawzall might have been better but I think the blade had gone walkabout. Cordless drill: Great, especially when you have at least 2 batteries Cordless sawzall: okay Cordless circular saw: pretty much useless Flashlight attachement: Great because it sits up nicely when in the attic The power tool that I really don't like using is the table saw. Much more so the slider radial arm saw, and way more than a lathe or mill. Apparently the first thing most folks do is remove that stupid thing that marks up wood and helps keep it from randomly flinging stuff toward you at high velocity (riving something?). Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com |
|
#25
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Fri, 11 Apr 2014 22:21:06 -0700, John Larkin
wrote: On Fri, 11 Apr 2014 20:07:12 -0400, wrote: On Fri, 11 Apr 2014 17:03:46 -0700, John Larkin wrote: On Fri, 11 Apr 2014 19:33:42 -0400, wrote: On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin jjlarkin@highNOTlandTHIStechnologyPART .com wrote in asgdk9d29q9ds74218i3r5me51loi12pm5@4ax .com: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. Not much different from cutting a 2x4. Sure, keep body parts away from the blade, in either case. You're *wrong*. *PLEASE* leave the power tools to someone who knows how to use them. You're dangerous. I have all 10 of my fingers, which is more than a lot of professional woodworkers can say. And the time spent doing this is? You *really* shouldn't take up this, even as a hobby. You *will* hurt yourself. |
|
#26
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Sat, 12 Apr 2014 02:41:41 -0400, Spehro Pefhany
wrote: On Fri, 11 Apr 2014 18:49:37 -0400, the renowned wrote: Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) The branches were on the ground. Just cutting them into 3' pieces for bundling so the city would haul them off. I'm not getting up on a ladder with a cordless circular saw. ;-) Cutting live wood with a circular saw is *not* a good idea. First, the pieces aren't round and worse, aren't uniform. When cutting dimensional lumber, you can clamp the piece so it doesn't move. You can't (easily) do that with branches. The chances of pinching the blade are greatly increased and kick-back is a real possibility. That can really ruin your day. The Makita isn't much different than operating a cordless screwdriver. It was quite safe - as safe as an work on a ladder. The saw won't cut much more than cedar siding, though. Even with a good blade, that's about all the 4" blade can cut. ;-) I don't have a gas chain saw (just an antique electric one without guards). The Hitachi version of a sawzall might have been better but I think the blade had gone walkabout. If you don't have the tools to do a job safely, don't do it. Missing fingers (or worse) aren't fun. Cordless drill: Great, especially when you have at least 2 batteries Cordless sawzall: okay Cordless circular saw: pretty much useless Flashlight attachement: Great because it sits up nicely when in the attic The power tool that I really don't like using is the table saw. Much more so the slider radial arm saw, and way more than a lathe or mill. Apparently the first thing most folks do is remove that stupid thing that marks up wood and helps keep it from randomly flinging stuff toward you at high velocity (riving something?). Then you're silly. A RAS is *far* more dangerous than a table saw. Neither are to be used without a large pile of caution but physics is working against you with a RAS. A compound slider is much safer but it's not really comparable to either. Riving knife? That's basically a splitter on steroids. It keeps the kerf open so the wood doesn't pinch the board. The difference between a riving knife and a splitter is that the knife adjusts to the height of the blade, so can be used for non-thru cuts. They don't damage the wood in any way. If you're talking about the "blade guard", it's purpose is to tell you that your fingers are getting too close. Your eyes should be telling you that. ;-) Part of many blade guards is a splitter and anti-kick plaws. I rarely use the guard myself, and prefer a separate splitter and plaws (removes is seconds). I like to see what I'm doing, also. Plaws only "mark" the wood if they're needed to save your bacon. Marking up the wood is a small price. OTOH, I find it simpler to just not stand in the path of potential projectiles. ;-) BTW, I had *many* more such problems with my RAS (5, that I can remember) than my table saw (0). The RAS hasn't been used in well over 20 years. One day I'll put it back together. -- |
|
#27
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Sat, 12 Apr 2014 11:34:55 -0400, wrote:
On Fri, 11 Apr 2014 22:21:06 -0700, John Larkin wrote: On Fri, 11 Apr 2014 20:07:12 -0400, wrote: On Fri, 11 Apr 2014 17:03:46 -0700, John Larkin wrote: On Fri, 11 Apr 2014 19:33:42 -0400, wrote: On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin jjlarkin@highNOTlandTHIStechnologyPAR T.com wrote in asgdk9d29q9ds74218i3r5me51loi12pm5@4a x.com: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. Not much different from cutting a 2x4. Sure, keep body parts away from the blade, in either case. You're *wrong*. *PLEASE* leave the power tools to someone who knows how to use them. You're dangerous. I have all 10 of my fingers, which is more than a lot of professional woodworkers can say. And the time spent doing this is? A lot, for an electrical engineer. I've also done, and do, a fair amount of metal machining, mills and drill presses and bandsaws, too. A bandsaw is more dangerous than a circular saw. You *really* shouldn't take up this, even as a hobby. You *will* hurt yourself. Haven't so far. My worst tool accident was cutting my finger with a hand hacksaw. Band-aid level injury. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation |
|
#28
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Sat, 12 Apr 2014 09:47:20 -0700, the renowned John Larkin
wrote: A lot, for an electrical engineer. I've also done, and do, a fair amount of metal machining, mills and drill presses and bandsaws, too. A bandsaw is more dangerous than a circular saw. I won't have a vertical wood bandsaw. I have one of these http://www.grifdigital.com/metalwork/images/bandsaw.jpg You put a chunk of metal into it, start it, and go get a coffee. It shuts itself off when it cuts through. Makes a bit of a racket, but it's a lot nicer than the way a hacksaw sounds when I'm the one doing the sawing. ;-) They're like $250-300, courtesy of Chinese manufacturing. Throw outthe blade it comes with, and put a nice Starrett bimetal blade on it, and it's ready for work. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com |
|
#29
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
In sci.electronics.repair Spehro Pefhany wrote:
On Fri, 11 Apr 2014 18:49:37 -0400, the renowned wrote: Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) The branches were on the ground. Just cutting them into 3' pieces for bundling so the city would haul them off. I'm not getting up on a ladder with a cordless circular saw. ;-) I don't have a gas chain saw (just an antique electric one without guards). The Hitachi version of a sawzall might have been better but I think the blade had gone walkabout. Cordless drill: Great, especially when you have at least 2 batteries Cordless sawzall: okay Cordless circular saw: pretty much useless Flashlight attachement: Great because it sits up nicely when in the attic The power tool that I really don't like using is the table saw. Much more so the slider radial arm saw, and way more than a lathe or mill. Apparently the first thing most folks do is remove that stupid thing that marks up wood and helps keep it from randomly flinging stuff toward you at high velocity (riving something?). Which is why you don't stand directly behind the table saw, right in the path of any projectile. |
|
#30
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Sat, 12 Apr 2014 09:47:20 -0700, John Larkin
wrote: On Sat, 12 Apr 2014 11:34:55 -0400, wrote: On Fri, 11 Apr 2014 22:21:06 -0700, John Larkin wrote: On Fri, 11 Apr 2014 20:07:12 -0400, wrote: On Fri, 11 Apr 2014 17:03:46 -0700, John Larkin wrote: On Fri, 11 Apr 2014 19:33:42 -0400, wrote: On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin jjlarkin@highNOTlandTHIStechnologyPA RT.com wrote in asgdk9d29q9ds74218i3r5me51loi12pm5@4 ax.com: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. Not much different from cutting a 2x4. Sure, keep body parts away from the blade, in either case. You're *wrong*. *PLEASE* leave the power tools to someone who knows how to use them. You're dangerous. I have all 10 of my fingers, which is more than a lot of professional woodworkers can say. And the time spent doing this is? A lot, for an electrical engineer. I've also done, and do, a fair amount of metal machining, mills and drill presses and bandsaws, too. A bandsaw is more dangerous than a circular saw. Utter nonsense. A bandsaw will not kick-back. A circular saw (skill, table, or RAS) certainly will, and when it does it spits things at high velocity, if you're lucky. If you're not, it can suck fingers into the sharp bits. Bandsaws do not have any failure mode that will pull you into it or throw things at you. You *really* shouldn't take up this, even as a hobby. You *will* hurt yourself. Haven't so far. My worst tool accident was cutting my finger with a hand hacksaw. Band-aid level injury. That attitude is just asking to lose digits, or worse. |
|
#31
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Sat, 12 Apr 2014 20:18:47 +0000 (UTC), Jerry Peters
wrote: In sci.electronics.repair Spehro Pefhany wrote: On Fri, 11 Apr 2014 18:49:37 -0400, the renowned wrote: Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) The branches were on the ground. Just cutting them into 3' pieces for bundling so the city would haul them off. I'm not getting up on a ladder with a cordless circular saw. ;-) I don't have a gas chain saw (just an antique electric one without guards). The Hitachi version of a sawzall might have been better but I think the blade had gone walkabout. Cordless drill: Great, especially when you have at least 2 batteries Cordless sawzall: okay Cordless circular saw: pretty much useless Flashlight attachement: Great because it sits up nicely when in the attic The power tool that I really don't like using is the table saw. Much more so the slider radial arm saw, and way more than a lathe or mill. Apparently the first thing most folks do is remove that stupid thing that marks up wood and helps keep it from randomly flinging stuff toward you at high velocity (riving something?). Which is why you don't stand directly behind the table saw, right in the path of any projectile. Behind the fence is the safest place to be. ...and *never* reach across or behind the blade. |
|
#32
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On 2014-04-10, wrote:
On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). Can you buy a 9" angle grinder with less? (would anyone want to?) granted these tools need both hands, but they are hand tools. -- umop apisdn --- news://freenews.netfront.net/ - complaints: --- |
|
#33
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On 14 Apr 2014 13:07:53 GMT, Jasen Betts wrote:
On 2014-04-10, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). Can you buy a 9" angle grinder with less? (would anyone want to?) granted these tools need both hands, but they are hand tools. Hell, a Dremel is close to 1/4 HP! -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation |
|
#34
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
In sci.electronics.repair wrote:
On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin m wrote in m: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. and a chainsaw is safer? |
|
#35
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Tue, 15 Apr 2014 17:56:29 +0000 (UTC), Cydrome Leader
wrote: In sci.electronics.repair wrote: On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin om wrote in om: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. and a chainsaw is safer? Than using a circular saw as a chainsaw? You bet your ass! That is what he's doing, in fact. There is a reason these tools exist. |
|
#36
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Mon, 14 Apr 2014 20:52:17 -0700, John Larkin
wrote: On 14 Apr 2014 13:07:53 GMT, Jasen Betts wrote: On 2014-04-10, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin wrote in : I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). Can you buy a 9" angle grinder with less? (would anyone want to?) granted these tools need both hands, but they are hand tools. Hell, a Dremel is close to 1/4 HP! Bull****. |
|
#37
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
In sci.electronics.repair wrote:
On Tue, 15 Apr 2014 17:56:29 +0000 (UTC), Cydrome Leader wrote: In sci.electronics.repair wrote: On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin jjlarkin@highNOTlandTHIStechnologyPART. com wrote in asgdk9d29q9ds74218i3r5me51loi12pm5@4ax. com: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. and a chainsaw is safer? Than using a circular saw as a chainsaw? You bet your ass! That is what he's doing, in fact. There is a reason these tools exist. I can't think of any use of a circular saw that makes it more dangerous than a chainsaw. |
|
#38
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Wed, 16 Apr 2014 18:41:33 +0000 (UTC), Cydrome Leader
wrote: In sci.electronics.repair wrote: On Tue, 15 Apr 2014 17:56:29 +0000 (UTC), Cydrome Leader wrote: In sci.electronics.repair wrote: On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin jjlarkin@highNOTlandTHIStechnologyPART .com wrote in asgdk9d29q9ds74218i3r5me51loi12pm5@4ax .com: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. and a chainsaw is safer? Than using a circular saw as a chainsaw? You bet your ass! That is what he's doing, in fact. There is a reason these tools exist. I can't think of any use of a circular saw that makes it more dangerous than a chainsaw. Then you can't think. Each tool has its uses and its dangers. Using the wrong tool is always dangerous. |
|
#39
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Wed, 16 Apr 2014 19:20:10 -0400, wrote:
On Wed, 16 Apr 2014 18:41:33 +0000 (UTC), Cydrome Leader wrote: In sci.electronics.repair wrote: On Tue, 15 Apr 2014 17:56:29 +0000 (UTC), Cydrome Leader wrote: In sci.electronics.repair wrote: On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin jjlarkin@highNOTlandTHIStechnologyPAR T.com wrote in asgdk9d29q9ds74218i3r5me51loi12pm5@4a x.com: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. and a chainsaw is safer? Than using a circular saw as a chainsaw? You bet your ass! That is what he's doing, in fact. There is a reason these tools exist. I can't think of any use of a circular saw that makes it more dangerous than a chainsaw. Then you can't think. Each tool has its uses and its dangers. Using the wrong tool is always dangerous. I have noticed that, most of the time, there is something within reach that will work well enough. -- John Larkin Highland Technology, Inc jlarkin att highlandtechnology dott com http://www.highlandtechnology.com |
|
#40
Posted to sci.electronics.design,sci.electronics.repair
|
|||
|
|||
|
LG hombot robot vacuum cleaner disassembly
On Wed, 16 Apr 2014 17:04:52 -0700, John Larkin
wrote: On Wed, 16 Apr 2014 19:20:10 -0400, wrote: On Wed, 16 Apr 2014 18:41:33 +0000 (UTC), Cydrome Leader wrote: In sci.electronics.repair wrote: On Tue, 15 Apr 2014 17:56:29 +0000 (UTC), Cydrome Leader wrote: In sci.electronics.repair wrote: On Fri, 11 Apr 2014 16:15:44 -0700, John Larkin wrote: On Fri, 11 Apr 2014 18:49:37 -0400, wrote: On Fri, 11 Apr 2014 07:54:15 -0400, Spehro Pefhany wrote: On Thu, 10 Apr 2014 16:42:37 -0700, the renowned John Larkin wrote: On Thu, 10 Apr 2014 18:37:39 -0400, wrote: On Thu, 10 Apr 2014 15:07:38 -0700, John Larkin wrote: On Thu, 10 Apr 2014 18:50:31 GMT, Jan Panteltje wrote: On a sunny day (Thu, 10 Apr 2014 09:16:12 -0700) it happened John Larkin jjlarkin@highNOTlandTHIStechnologyPA RT.com wrote in asgdk9d29q9ds74218i3r5me51loi12pm5@4 ax.com: I avoid battery-powered tools. They are wimpy, and the batteries will die in a year or two. You have a cellphone? Sure, a simple one. I charge it about every other week, and I've replaced the battery once. But it's not a power tool. You're not going to get a horsepower or so out of a battery for long, especially when the battery is two years old. You're not going to get a "horsepower or so" out of a hand tool. You're in the stationary tool realm at a HP (Craftsman HPs don't count). 120 volts, 15 amps is 1800 watts. Lots of circular saws pull 13 amps, 1560 watts. Cordless circular saws (even small 6.5" ones) are close to useless. Not so. I have a DeWalt that's quite nice on plywood and such. I also have an older Makita that's great for cedar siding. It sure as hell beats a 10lb. corded monster when you're trying to trim a piece of siding, 15' up a ladder on the side of the house. ;-) I've got a Hitachi one that came in a kit- cut up few ~2" branches that were felled by an ice storm and it was already dying. A circular saw used on a tree? You must be suicidal. Cutting a 2" diameter branch with a 6" saw? You *have* to be! Haven't you ever heard of a chain saw, or even a reciprocating saw? ;-) Aren't trees still made out of wood? Yes, and fingers are still made of skin and bone; much softer than even wood. Circular saws are very dangerous things when used by a someone with no respect for them. They are *not* designed for this sort of thing. and a chainsaw is safer? Than using a circular saw as a chainsaw? You bet your ass! That is what he's doing, in fact. There is a reason these tools exist. I can't think of any use of a circular saw that makes it more dangerous than a chainsaw. Then you can't think. Each tool has its uses and its dangers. Using the wrong tool is always dangerous. I have noticed that, most of the time, there is something within reach that will work well enough. Yeah, a friend thought the same thing about hammers, until he used a framing hammer to drive cut nails. Some ten eye surgeries later he figured out just what a mistake that was. |
| Reply |
|
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| VAX AVC 1 Vacuum Cleaner | Electronics Repair | |||
| vacuum cleaner new | Home Repair | |||
| Best vacuum cleaner for DIY? | UK diy | |||
| Vacuum Cleaner- Which is the best?? | Home Ownership | |||
| My climbing pool robot cleaner is getting stuck on my pool stairs | Home Repair | |||
Linear Mode
