Y motor / belt slip error

[mobident]

Y truck travel had become v. stiff and was getting "belt slip error"
1) after bit plate touch, and travel to keypad side, error comes up and allows to continue.
2)continue gives y axis fault.


Cleaned out the track and got temporary improvement in travel of the truck by hand, but stiff again under project start and same error.
Took y motor out - a fabrication barb on the big gear had warn through the plastic window. Was packed w saw dust. Cleaned out, re-greased. re-installed. Was still stiff.

adjusting the position of the motor slightly seemed to free up travel again. However, doing a start up for a project gets the same error, and travel is stiff again.

I have ordered a new y motor, assuming bearing wear, but if anyone has some other insight wrt belt tension, etc. I would love to hear.

I suppose it is possible that the "belt slip" is a separate issue from the stiffness/ resistance to travel as I can detect no slip at the point of the error. I have always (4 years) had a noise from the y belt when loading a bit as it goes to the touch plate. It drives the belt for 3 or 4 jumps of the belt on the gear giving a "chunk, chunk chunk".

This slip belt began after running one project on latest software upgrade (1.76). The upgrade resolved a cutmotor error message that came at the start of the carve after getting all the bits. The motor had tested out fine. I believe that was version 1.53

Thanks,
Bruce