X axis vibrating when home activated

[Tom]

Tried searching forum first for similar issues with no luck.

Using PMDX 126 and 134 with warp9 ESS  for 6 months on Windows 10 with no problems.
Now x axis stepper is vibrating in place and jogging opposite directions sporadically.

Replaced or swapped control cables, stepper and gecko drive.

Updated all drivers and mach 3.

I have attached my XML if it helps.

Would love some help with this.

Maybe you have encountered this problem before? Possibly the Warp9 ESS?

Thanks!

Tom

[Mike Abbott]

I had similar behavior but with one of the PMDX 414.  drove me insane for a while and it turned out to be one loose pin inside a connector going to the stepper motor.  took the connector apart, redid the pins and it was back in service.  It was quite intermittent based on where the axis was (just enough strain on the cable to cause the connector to move.

One test you can do is to disconnect the stepper from the gecko right at the gecko end and test continuity for each coil in the stepper.  I'll kind of bet you've got bad connectivity on one coil.

Mike