Treadmill motor wiring diagram & testing procedures

Jul 12, 2005 3 Replies
J

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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W

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)
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J

I can do that, except checking the gate drive. No scope. But the rest is easy.

Thanks, I appreciate it. James Johnson

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W

ok, report results and we'll take it from there.

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