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Woodturning (rec.crafts.woodturning) To discuss tools, techniques, styles, materials, shows and competitions, education and educational materials related to woodturning. All skill levels are welcome, from art turners to production turners, beginners to masters. |
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Treadmill motor wiring diagram & testing procedures
Guys, my Jet Mini with a shop-installed but Jet supplied treadmill motor
took a tumble. Now it won't run. I have looked for obvious things like loose wires, broken connections, cracked circuit board, etc. but do not find anything. Looking at it didn't fix it either--don't laugh, it has worked before!! So if anyone has wiring diagrams and/or testing procedures, I would be grateful for that info. Nearest repair shop is 2 hrs away, $75 minimum charge, 10 day backlog. Would really like to fix it myself if possible, since Jet sold out of these motors a long time ago. Thanks, James Johnson |
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ok, try this - I presume you have a DC brush motor? if yes
1. apply DC power to the motor - a car battery will do - does it run? 2. check circuit board for cracks - almost guaranteed 3. power up circuit board/motor (away from lathe) verify AC power at input, verify no DC at output 4. check SCR - anything at the output? (if no then 5. check gate drive - use a scope, that's easist - see if you have any kind of gate drive that looks reasonable (2 or 3 volt pulses) "JRJohnson" wrote in message .. . Guys, my Jet Mini with a shop-installed but Jet supplied treadmill motor took a tumble. Now it won't run. I have looked for obvious things like loose wires, broken connections, cracked circuit board, etc. but do not find anything. Looking at it didn't fix it either--don't laugh, it has worked before!! So if anyone has wiring diagrams and/or testing procedures, I would be grateful for that info. Nearest repair shop is 2 hrs away, $75 minimum charge, 10 day backlog. Would really like to fix it myself if possible, since Jet sold out of these motors a long time ago. Thanks, James Johnson |
#3
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I can do that, except checking the gate drive. No scope. But the rest is
easy. Thanks, I appreciate it. James Johnson "william_b_noble" wrote in message news:1121216044.ca8936c9cfcd2e2c99ec4e86fea49a94@t eranews... ok, try this - I presume you have a DC brush motor? if yes 1. apply DC power to the motor - a car battery will do - does it run? 2. check circuit board for cracks - almost guaranteed 3. power up circuit board/motor (away from lathe) verify AC power at input, verify no DC at output 4. check SCR - anything at the output? (if no then 5. check gate drive - use a scope, that's easist - see if you have any kind of gate drive that looks reasonable (2 or 3 volt pulses) "JRJohnson" wrote in message .. . Guys, my Jet Mini with a shop-installed but Jet supplied treadmill motor took a tumble. Now it won't run. I have looked for obvious things like loose wires, broken connections, cracked circuit board, etc. but do not find anything. Looking at it didn't fix it either--don't laugh, it has worked before!! So if anyone has wiring diagrams and/or testing procedures, I would be grateful for that info. Nearest repair shop is 2 hrs away, $75 minimum charge, 10 day backlog. Would really like to fix it myself if possible, since Jet sold out of these motors a long time ago. Thanks, James Johnson |
#4
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ok, report results and we'll take it from there.
"JRJohnson" wrote in message ... I can do that, except checking the gate drive. No scope. But the rest is easy. Thanks, I appreciate it. James Johnson "william_b_noble" wrote in message news:1121216044.ca8936c9cfcd2e2c99ec4e86fea49a94@t eranews... ok, try this - I presume you have a DC brush motor? if yes 1. apply DC power to the motor - a car battery will do - does it run? 2. check circuit board for cracks - almost guaranteed 3. power up circuit board/motor (away from lathe) verify AC power at input, verify no DC at output 4. check SCR - anything at the output? (if no then 5. check gate drive - use a scope, that's easist - see if you have any kind of gate drive that looks reasonable (2 or 3 volt pulses) "JRJohnson" wrote in message .. . Guys, my Jet Mini with a shop-installed but Jet supplied treadmill motor took a tumble. Now it won't run. I have looked for obvious things like loose wires, broken connections, cracked circuit board, etc. but do not find anything. Looking at it didn't fix it either--don't laugh, it has worked before!! So if anyone has wiring diagrams and/or testing procedures, I would be grateful for that info. Nearest repair shop is 2 hrs away, $75 minimum charge, 10 day backlog. Would really like to fix it myself if possible, since Jet sold out of these motors a long time ago. Thanks, James Johnson |
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