Home |
Search |
Today's Posts |
|
Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to rec.crafts.metalworking
|
|||
|
|||
Big triumph, HOME SWITCHES WORK AND MACHINE HOMES
Finally common sense triumphed over laziness.
I found out all the home switch wiring. The home switches had a common 65 and signals 94, 95, 96 for X, Y and Z. Wired and typed various **** into INI files, and after a lot of confusion, all axes now home to limit switches and to index pulse. They also do it relatively quickly. (approaching home slowly does not work, as the switch bounces and confuses EMC). The limit switches are now strictly for safety purposes. When the machine traveled to the Y limit switch, I had a chance to look at the fish scale pattern on the knee, and wow, the fish scale looks like new! Today was an unusually good day in other respects (visited Google office in Chicago and got some good suggestions). This is really rare. My average day is usually between medium and "meduim ****ty". I have to figure out the coordinate system business tomorrow. I am comlpetely confused. i |
#2
Posted to rec.crafts.metalworking
|
|||
|
|||
Big triumph, HOME SWITCHES WORK AND MACHINE HOMES
Ignoramus9140 wrote: Finally common sense triumphed over laziness. I found out all the home switch wiring. The home switches had a common 65 and signals 94, 95, 96 for X, Y and Z. Wired and typed various **** into INI files, and after a lot of confusion, all axes now home to limit switches and to index pulse. They also do it relatively quickly. (approaching home slowly does not work, as the switch bounces and confuses EMC). There should be a debounce interval parameter in there somewhere that you can set to overcome switch bounce. |
#3
Posted to rec.crafts.metalworking
|
|||
|
|||
Big triumph, HOME SWITCHES WORK AND MACHINE HOMES
On 2010-07-22, Pete C. wrote:
Ignoramus9140 wrote: Finally common sense triumphed over laziness. I found out all the home switch wiring. The home switches had a common 65 and signals 94, 95, 96 for X, Y and Z. Wired and typed various **** into INI files, and after a lot of confusion, all axes now home to limit switches and to index pulse. They also do it relatively quickly. (approaching home slowly does not work, as the switch bounces and confuses EMC). There should be a debounce interval parameter in there somewhere that you can set to overcome switch bounce. If I am fast enough in my initial move, bounce is not a problem any more. What happens is that if I approach home slowly, the home switch triggers, but since the table stops instantly, it untriggers. If the table moves fast, it takes it some distance to stop (1mm?) and by that time, the switch is fully actuated. Homing fast is what I want, anyway. The question I have is how fast should I be in my index-finding move (latching move). i |
#4
Posted to rec.crafts.metalworking
|
|||
|
|||
Big triumph, HOME SWITCHES WORK AND MACHINE HOMES
--Well hey, now that you're a pro you should come over and fix the
nonfunctioning X-axis home switch on *my* mill! :-) -- "Steamboat Ed" Haas : A human without a critter Hacking the Trailing Edge! : is incomplete.. www.nmpproducts.com ---Decks a-wash in a sea of words--- |
#5
Posted to rec.crafts.metalworking
|
|||
|
|||
Big triumph, HOME SWITCHES WORK AND MACHINE HOMES
On 2010-07-22, steamer wrote:
--Well hey, now that you're a pro you should come over and fix the nonfunctioning X-axis home switch on *my* mill! :-) I do have some home switches for sale. i |
#6
Posted to rec.crafts.metalworking
|
|||
|
|||
Big triumph, HOME SWITCHES WORK AND MACHINE HOMES
Ignoramus24043 wrote:
What happens is that if I approach home slowly, the home switch triggers, but since the table stops instantly, it untriggers. You may have oil in the switches. Now that you are using it, it may clear up after a while. (or, it may get bad enough you will need to eventually replace the switches. Watch during homing for it to ignore the switch and just keep moving.) If the table moves fast, it takes it some distance to stop (1mm?) and by that time, the switch is fully actuated. Homing fast is what I want, anyway. The question I have is how fast should I be in my index-finding move (latching move). Although the latest incarnation of the PPMC does this all in hardware at 10 MHz speed, it seems prudent that you shouldn't be moving more than 1 encoder count per servo cycle, or typically 1000 counts/second. But, in fact, it doesn't matter, as the encoder counter is zeroed in hardware when the index pulse is detected and the zero-count-on-index logic is enabled. Jon |
#7
Posted to rec.crafts.metalworking
|
|||
|
|||
Big triumph, HOME SWITCHES WORK AND MACHINE HOMES
On 2010-07-22, Jon Elson wrote:
Ignoramus24043 wrote: What happens is that if I approach home slowly, the home switch triggers, but since the table stops instantly, it untriggers. You may have oil in the switches. Now that you are using it, it may clear up after a while. (or, it may get bad enough you will need to eventually replace the switches. Watch during homing for it to ignore the switch and just keep moving.) I think that you got it. The resistance that I measured, was kind of high for a closed switch. If the table moves fast, it takes it some distance to stop (1mm?) and by that time, the switch is fully actuated. Homing fast is what I want, anyway. The question I have is how fast should I be in my index-finding move (latching move). Although the latest incarnation of the PPMC does this all in hardware at 10 MHz speed, it seems prudent that you shouldn't be moving more than 1 encoder count per servo cycle, or typically 1000 counts/second. But, in fact, it doesn't matter, as the encoder counter is zeroed in hardware when the index pulse is detected and the zero-count-on-index logic is enabled. I have upped the speeds a little bit, and made all axes home at once. Now the homing part is really quick. The last part of homing involves getting the middle of the table approximately under the quill, for convenience. |
#8
Posted to rec.crafts.metalworking
|
|||
|
|||
Big triumph, HOME SWITCHES WORK AND MACHINE HOMES
On Thu, 22 Jul 2010 20:24:20 -0500, Ignoramus24043
wrote: On 2010-07-22, Jon Elson wrote: Ignoramus24043 wrote: What happens is that if I approach home slowly, the home switch triggers, but since the table stops instantly, it untriggers. You may have oil in the switches. Now that you are using it, it may clear up after a while. (or, it may get bad enough you will need to eventually replace the switches. Watch during homing for it to ignore the switch and just keep moving.) I think that you got it. The resistance that I measured, was kind of high for a closed switch. If the table moves fast, it takes it some distance to stop (1mm?) and by that time, the switch is fully actuated. Homing fast is what I want, anyway. The question I have is how fast should I be in my index-finding move (latching move). Although the latest incarnation of the PPMC does this all in hardware at 10 MHz speed, it seems prudent that you shouldn't be moving more than 1 encoder count per servo cycle, or typically 1000 counts/second. But, in fact, it doesn't matter, as the encoder counter is zeroed in hardware when the index pulse is detected and the zero-count-on-index logic is enabled. I have upped the speeds a little bit, and made all axes home at once. Now the homing part is really quick. The last part of homing involves getting the middle of the table approximately under the quill, for convenience. Approximately?????? G Gunner One could not be a successful Leftwinger without realizing that, in contrast to the popular conception supported by newspapers and mothers of Leftwingers, a goodly number of Leftwingers are not only narrow-minded and dull, but also just stupid. Gunner Asch |
#9
Posted to rec.crafts.metalworking
|
|||
|
|||
Big triumph, HOME SWITCHES WORK AND MACHINE HOMES
On 2010-07-23, Gunner Asch wrote:
On Thu, 22 Jul 2010 20:24:20 -0500, Ignoramus24043 wrote: On 2010-07-22, Jon Elson wrote: Ignoramus24043 wrote: What happens is that if I approach home slowly, the home switch triggers, but since the table stops instantly, it untriggers. You may have oil in the switches. Now that you are using it, it may clear up after a while. (or, it may get bad enough you will need to eventually replace the switches. Watch during homing for it to ignore the switch and just keep moving.) I think that you got it. The resistance that I measured, was kind of high for a closed switch. If the table moves fast, it takes it some distance to stop (1mm?) and by that time, the switch is fully actuated. Homing fast is what I want, anyway. The question I have is how fast should I be in my index-finding move (latching move). Although the latest incarnation of the PPMC does this all in hardware at 10 MHz speed, it seems prudent that you shouldn't be moving more than 1 encoder count per servo cycle, or typically 1000 counts/second. But, in fact, it doesn't matter, as the encoder counter is zeroed in hardware when the index pulse is detected and the zero-count-on-index logic is enabled. I have upped the speeds a little bit, and made all axes home at once. Now the homing part is really quick. The last part of homing involves getting the middle of the table approximately under the quill, for convenience. Approximately?????? yes, I still have to figure out exact travel limits (I did it on Z only). Once I do, the middle between them, would be the exact center. i |
#10
Posted to rec.crafts.metalworking
|
|||
|
|||
Big triumph, HOME SWITCHES WORK AND MACHINE HOMES
On Fri, 23 Jul 2010 07:53:56 -0500, Ignoramus7608
wrote: On 2010-07-23, Gunner Asch wrote: On Thu, 22 Jul 2010 20:24:20 -0500, Ignoramus24043 wrote: On 2010-07-22, Jon Elson wrote: Ignoramus24043 wrote: What happens is that if I approach home slowly, the home switch triggers, but since the table stops instantly, it untriggers. You may have oil in the switches. Now that you are using it, it may clear up after a while. (or, it may get bad enough you will need to eventually replace the switches. Watch during homing for it to ignore the switch and just keep moving.) I think that you got it. The resistance that I measured, was kind of high for a closed switch. If the table moves fast, it takes it some distance to stop (1mm?) and by that time, the switch is fully actuated. Homing fast is what I want, anyway. The question I have is how fast should I be in my index-finding move (latching move). Although the latest incarnation of the PPMC does this all in hardware at 10 MHz speed, it seems prudent that you shouldn't be moving more than 1 encoder count per servo cycle, or typically 1000 counts/second. But, in fact, it doesn't matter, as the encoder counter is zeroed in hardware when the index pulse is detected and the zero-count-on-index logic is enabled. I have upped the speeds a little bit, and made all axes home at once. Now the homing part is really quick. The last part of homing involves getting the middle of the table approximately under the quill, for convenience. Approximately?????? yes, I still have to figure out exact travel limits (I did it on Z only). Once I do, the middle between them, would be the exact center. i Ah!...chuckle...G Gunner One could not be a successful Leftwinger without realizing that, in contrast to the popular conception supported by newspapers and mothers of Leftwingers, a goodly number of Leftwingers are not only narrow-minded and dull, but also just stupid. Gunner Asch |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Wiring various machine health switches | Metalworking | |||
Do dimmer switches work with Low Energy Bulbs? | UK diy | |||
Thinking of buying a new home from Veranda Homes LLC? | Home Repair | |||
Can I attach a PC Broadband Home Antennae to the top of my Homes MainElectrical Mast ? | Home Repair |