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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. |
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#1
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Feasability study
There are occasions when it would be handy to have a portable piece
of equiptment that is used at a remote worksite that is capable of being run from a 12VDC or 24VDC power source. I am aware that there are dc to ac power inverters but the ones i have looked at are pricey once you get into 5kw range. A portable generator is not desirable for my needs. High torque low voltage DC motors from industrial supply houses are cost prohibitive. I was pondering using a automotive starter motor for say running a small compressor, horizontal bandsaw, drill press etc. This unit looks like it can be modified to accept a pulley by removing the bendix. http://www.ebay.com/itm/370868870946 Anybody try this appoach? Results? The max run time on the motor would be 5 to 10 min at a time. Will there be any issues with over heating the motor? TIA. Best Regards Tom. -- http://fija.org/ -- http://fija.org/ |
#2
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Feasability study
On 2014-03-20, azotic wrote:
There are occasions when it would be handy to have a portable piece of equiptment that is used at a remote worksite that is capable of being run from a 12VDC or 24VDC power source. I am aware that there are dc to ac power inverters but the ones i have looked at are pricey once you get into 5kw range. A portable generator is not desirable for my needs. High torque low voltage DC motors from industrial supply houses are cost prohibitive. I was pondering using a automotive starter motor for say running a small compressor, horizontal bandsaw, drill press etc. This unit looks like it can be modified to accept a pulley by removing the bendix. http://www.ebay.com/itm/370868870946 Anybody try this appoach? Results? The max run time on the motor would be 5 to 10 min at a time. Will there be any issues with over heating the motor? Automotive starters can only run for a very short time, 15 seconds to a minute. After that they overheat. i |
#3
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Feasability study
Ignoramus28555 fired this volley in
: Automotive starters can only run for a very short time, 15 seconds to a minute. After that they overheat. If you can find a CASE brand "starterator", they are rated for continuous duty. They won't have as much torque as a starter-only motor, but they'll run off 12VDC indefinitely. I know of no 24V version. But why modify junk? There are tons of universal motors out there in those voltage ranges. And why cobble something up by hacking a good device when you can just buy the motor for the purpose? Have you considered DC servo motors? They're not free, but pretty cheap on the surplus and pull-out market. I have three HONKIN' big ones from a Bridgeport R2E4 CNC mill I'll sell you for $600 for all three. Lloyd |
#4
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Feasability study
"Ignoramus28555" wrote in message ... On 2014-03-20, azotic wrote: There are occasions when it would be handy to have a portable piece of equiptment that is used at a remote worksite that is capable of being run from a 12VDC or 24VDC power source. I am aware that there are dc to ac power inverters but the ones i have looked at are pricey once you get into 5kw range. A portable generator is not desirable for my needs. High torque low voltage DC motors from industrial supply houses are cost prohibitive. I was pondering using a automotive starter motor for say running a small compressor, horizontal bandsaw, drill press etc. This unit looks like it can be modified to accept a pulley by removing the bendix. http://www.ebay.com/itm/370868870946 Anybody try this appoach? Results? The max run time on the motor would be 5 to 10 min at a time. Will there be any issues with over heating the motor? Automotive starters can only run for a very short time, 15 seconds to a minute. After that they overheat. i http://www.surpluscenter.com/Electri...OR-10-1839.axd |
#5
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Feasability study
Starters are designed for high output and short cycle. the opposite of
what you're after. You need continous duty. look to surplus center or fleabay for cheap DC motors. Scrap golf carts are another great source. Karl |
#6
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Feasability study
On 20/03/14 09:04, azotic wrote:
There are occasions when it would be handy to have a portable piece of equiptment that is used at a remote worksite that is capable of being run from a 12VDC or 24VDC power source. I am aware that there are dc to ac power inverters but the ones i have looked at are pricey once you get into 5kw range. A portable generator is not desirable for my needs. High torque low voltage DC motors from industrial supply houses are cost prohibitive. I was pondering using a automotive starter motor for say running a small compressor, horizontal bandsaw, drill press etc. This unit looks like it can be modified to accept a pulley by removing the bendix. http://www.ebay.com/itm/370868870946 Anybody try this appoach? Results? The max run time on the motor would be 5 to 10 min at a time. Will there be any issues with over heating the motor? TIA. Best Regards Tom. A more likely candidate would be some of the Bosch GPA series motors as they're continuous duty rated 12V and 24V and upto 750W. A couple of part numbers are 24V 750W 0 130 302 001 and 0 0130 302 013 which might enable you to find and vehicle application so you might find one 2nd hand. |
#7
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Feasability study
"Karl Townsend" wrote in message
... Starters are designed for high output and short cycle. the opposite of what you're after. You need continous duty. look to surplus center or fleabay for cheap DC motors. Scrap golf carts are another great source. Karl Broken power wheel chairs would be an excellent parts source if it weren't for government policies that can leave people dependent on grey-market repairs. I fixed them for a while, but wouldn't touch one now without an employer's insurance policy to protect me from liability. https://www.aahomecare.org/press/med...mited-mobility |
#8
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Feasability study
"Jim Wilkins" wrote in message
... Broken power wheel chairs would be an excellent parts source ... Here'a another good idea from the mobility industry: http://www.bruno.com/vehicle-lift-curb-sider.html A do-it-yourselfer could omit the electrics and use a boat trailer winch to lift generators and air compressors into the SUV. I maximized the lift height of my truck bed crane by fitting a pulley into the end of the boom. |
#9
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Feasability study
On Thu, 20 Mar 2014 02:04:48 -0700, "azotic"
wrote: There are occasions when it would be handy to have a portable piece of equiptment that is used at a remote worksite that is capable of being run from a 12VDC or 24VDC power source. I am aware that there What source would you use, your truck? are dc to ac power inverters but the ones i have looked at are pricey once you get into 5kw range. A portable generator is not desirable for my needs. High torque low voltage DC motors from industrial supply houses are cost prohibitive. I was pondering using a automotive starter motor for say running a small compressor, horizontal bandsaw, drill press etc. What, specifically, do you want to run? What voltage, current, etc? You can power a compressor with a lawnmower (or other cheap German) engine. http://tinyurl.com/ow26frz and http://tinyurl.com/pwfta67 I have a parallel bar setup to make a portable drill into a drill press. Like this: http://tinyurl.com/pmvuakz I think a 1kw inverter will run a HF 8" drill press (2/5hp) Have you considered a used generator? How about gas powered tools, both 2 and 4-stroke? I've seen them converted to drive damnear anything, such as... http://tinyurl.com/yagk22g http://tinyurl.com/qjzcyqm This unit looks like it can be modified to accept a pulley by removing the bendix. http://www.ebay.com/itm/370868870946 Anybody try this appoach? Results? The max run time on the motor would be 5 to 10 min at a time. Will there be any issues with over heating the motor? Yes, I'm sure there will be problems. They're designed for maximum power for short periods of time. Crank one for over a minute and they start getting really hot, even without a load. -- The most decisive actions of our life - I mean those that are most likely to decide the whole course of our future - are, more often than not, unconsidered. -- Andre Gide |
#10
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Feasability study
On Thu, 20 Mar 2014 07:29:51 -0400, "Jim Wilkins"
wrote: "Ignoramus28555" wrote in message ... On 2014-03-20, azotic wrote: There are occasions when it would be handy to have a portable piece of equiptment that is used at a remote worksite that is capable of being run from a 12VDC or 24VDC power source. I am aware that there are dc to ac power inverters but the ones i have looked at are pricey once you get into 5kw range. A portable generator is not desirable for my needs. High torque low voltage DC motors from industrial supply houses are cost prohibitive. I was pondering using a automotive starter motor for say running a small compressor, horizontal bandsaw, drill press etc. This unit looks like it can be modified to accept a pulley by removing the bendix. http://www.ebay.com/itm/370868870946 Anybody try this appoach? Results? The max run time on the motor would be 5 to 10 min at a time. Will there be any issues with over heating the motor? Automotive starters can only run for a very short time, 15 seconds to a minute. After that they overheat. i http://www.surpluscenter.com/Electri...OR-10-1839.axd Duty: Intermittent. (just like a starter motor) -- The most decisive actions of our life - I mean those that are most likely to decide the whole course of our future - are, more often than not, unconsidered. -- Andre Gide |
#11
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Feasability study
On 3/20/2014 6:03 AM, Ignoramus28555 wrote:
On 2014-03-20, wrote: There are occasions when it would be handy to have a portable piece of equiptment that is used at a remote worksite that is capable of being run from a 12VDC or 24VDC power source. I am aware that there are dc to ac power inverters but the ones i have looked at are pricey once you get into 5kw range. A portable generator is not desirable for my needs. High torque low voltage DC motors from industrial supply houses are cost prohibitive. I was pondering using a automotive starter motor for say running a small compressor, horizontal bandsaw, drill press etc. This unit looks like it can be modified to accept a pulley by removing the bendix. http://www.ebay.com/itm/370868870946 Anybody try this appoach? Results? The max run time on the motor would be 5 to 10 min at a time. Will there be any issues with over heating the motor? Automotive starters can only run for a very short time, 15 seconds to a minute. After that they overheat. i Heard that. But isn't that because they are basically 6 volt motors running on 12 volts? |
#12
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Feasability study
On Thu, 20 Mar 2014 13:46:08 -0500, Richard wrote:
On 3/20/2014 6:03 AM, Ignoramus28555 wrote: On 2014-03-20, wrote: There are occasions when it would be handy to have a portable piece of equiptment that is used at a remote worksite that is capable of being run from a 12VDC or 24VDC power source. I am aware that there are dc to ac power inverters but the ones i have looked at are pricey once you get into 5kw range. A portable generator is not desirable for my needs. High torque low voltage DC motors from industrial supply houses are cost prohibitive. I was pondering using a automotive starter motor for say running a small compressor, horizontal bandsaw, drill press etc. This unit looks like it can be modified to accept a pulley by removing the bendix. http://www.ebay.com/itm/370868870946 Anybody try this appoach? Results? The max run time on the motor would be 5 to 10 min at a time. Will there be any issues with over heating the motor? Automotive starters can only run for a very short time, 15 seconds to a minute. After that they overheat. i Heard that. But isn't that because they are basically 6 volt motors running on 12 volts? No. They're basically 12 volt motors that are designed for exactly the service that they usually provide: brief periods of operation at high torque, in between long periods of time where all they do is add weight and cost to the vehicle without contributing to its function. (Well, and for being as cheap as humanly possible while still getting the job done.) Operating one at 6V (or at lower torque output demands) may allow it to work longer, but it almost certainly won't be as good for a long-duration task as a motor that's designed specifically for continuous use at 6V. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com |
#13
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Feasability study
On 3/20/2014 2:04 AM, azotic wrote:
There are occasions when it would be handy to have a portable piece of equiptment that is used at a remote worksite that is capable of being run from a 12VDC or 24VDC power source. I am aware that there are dc to ac power inverters but the ones i have looked at are pricey once you get into 5kw range. A portable generator is not desirable for my needs. High torque low voltage DC motors from industrial supply houses are cost prohibitive. I was pondering using a automotive starter motor for say running a small compressor, horizontal bandsaw, drill press etc. This unit looks like it can be modified to accept a pulley by removing the bendix. http://www.ebay.com/itm/370868870946 Anybody try this appoach? Results? The max run time on the motor would be 5 to 10 min at a time. Will there be any issues with over heating the motor? TIA. Best Regards Tom. Dad used a starter motor with a flexible shaft and stone to sharpen the bits on the big circular saw in his portable saw mill. This was in the late 1940's and early 1950's. I don't think he ever replaced the motor. Probably a 6 volt motor. And was intermittent. Current starter automobile starters are probably not useable, as others have said. However, starter motors, like on my 1997 Dodge diesel pickup don't run steady for a long time. I have had to replace the solenoid contacts because the arcing eroded them. That has been the only problem. As I recall, that motor is a 12 HP starter. Find a truck starter and try it. Paul |
#14
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Feasability study
On 03/20/2014 04:04 AM, azotic wrote:
There are occasions when it would be handy to have a portable piece of equiptment that is used at a remote worksite that is capable of being run from a 12VDC or 24VDC power source. I am aware that there are dc to ac power inverters but the ones i have looked at are pricey once you get into 5kw range. A portable generator is not desirable for my needs. High torque low voltage DC motors from industrial supply houses are cost prohibitive. I was pondering using a automotive starter motor for say running a small compressor, horizontal bandsaw, drill press etc. Anyone know the voltage of treadmill motors? If appropriate for this use, used (rescued from discards) they should be cheap. technomaNge -- |
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