Blown CIM?

[Gregor]

Originally Posted by mman1506

6 failed CIM motors

?!?

[Ether]

Originally Posted by mman1506

Measuring free current allowed us to identify 6 failed CIM motors In our 2014 drivetrain. While there was no noticeable physical damage or resistance the motors were drawing 240w (20a) with no load on them.

The above is ambiguous for 2 reasons:

1) Was that 20a total for all 6 CIMs? Because if so, that's in the ballpark for normal.

2) What do you mean by "no load" ?? Were the CIM output shafts completely unattached to anything? Or were they still mounted in a gearbox?

[evanperryg]

Originally Posted by Ether

The above is ambiguous for 2 reasons:

1) Was that 20a total for all 6 CIMs? Because if so, that's in the ballpark for normal.

2) What do you mean by "no load" ?? Were the CIM output shafts completely unattached to anything? Or were they still mounted in a gearbox?

What I find most ambiguous about this is... how were there 6 dead motors in your drivetrain?

[Richard Wallace]

Originally Posted by evanperryg

What I find most ambiguous about this is... how were there 6 dead motors in your drivetrain?

Long ago I ceased being amazed when motors, presumed dead, are later found very much alive -- following replacement of wiring, electrical hardware, or code.

CIMs can be killed and I have seen it; however, I have never seen six killed at the same time.