Thread: Drill motor Demagnetization and lowered-torque woes
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Unread 24-06-2002, 03:43
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#0047 (ChiefDelphi)
  
Join Date: May 2001
Location: Pontiac, MI
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I'd never seen it either, that's why I posted
Posted by Joe Balint at 04/25/2001 12:25 AM EST


Engineer on team #537, Domo ARIGATO, from Sussex Hamilton HS and GE Medical Systems.


In Reply to: Never seen this before
Posted by Joe Johnson on 04/21/2001 6:42 PM EST:



Joe-
I'd neither seen it nor heard of it before it happened to us. I don't believe it was a circuit breaker (swapping motors fixed our problem) but I will certainly look into this option (Although why it would only affect the motor in one direction, I can not fathom) And yes we have the motors and we are sending them to the manufacturer to find out if there are any shorted windings, or if our theory on demagnetizing the magnets is indeed the root cause. I'll keep you posted and then post the final analysis on the sharingFIRST site. Our temporary fix is to software limit the motor speeds by ramping the the speed instead of allowing instantaneous full power direction changes.





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