[Mike Betts]

Originally Posted by diviney

Mike (and all):

I do not believe this problem has anything to do with the application and/or the PTC in the window motor as evidenced by several things...

First, switching to a Victor has completely eliminated the problem. If it were application / heating, this would be no different with a victor or a Jag. Second, the output of the Jag went brain-dead when the motor was mis-behaving. It was no longer switching as observed on a scope. Finally, we are using the motor on a very intermittant basis. It hardly gets warm to the touch. Yes, the PTC may be intended to react quickly (ie: Junior's arm in the window), but our problems have not occurred after a period of use, but rather after a period where it has been idle (when we first try to deploy the arm after being idle for the whole match).

I can capture a scope plot or-two to illustrate the erroneous output waveform when in it's bad mode.

-Tom

Tom,

I just re-read your original post and agree with you. My apologies for going off on a tangent...

You may wish to get a Luminary Micro applications engineer in the loop of your investigation...

Regards,

Mike

Postscript: Let us know what they say...