|
Re: Short circuit CIM
When Continuing the search for root cause, Richard disassembled another CIM motor, so He could examine that one and Mine side-by-side.
The image below shows a potentially significant difference -- mine is on the left, and the other CIM is on the right. The copper braid brush pigtail connected to the red motor lead is slightly longer on your motor than it is on the other. In the position shown, that braid can contact the inside of the motor case. He reassembled just after taking this picture and measured a short between red motor lead and case.
Short circuit between brush braid and case seems more likely than carbon dust (per my earlier email) to explain what you saw at MSC. Dust will accumulate in all CIMs eventually, but probably only a very few CIMs are built with long brush braids?
|