Picked up a vintage 1990 VF1 that has x axis issues. On initial zero return if the Y axis zeros before the x the machine errors out with 139. After tweaking the settings to move without zero return and jogging y back far enough to let x zero first, there is no error and the machine runs fine (as long as y is not near the front of the machine when you try to move x).
History-discovered after figuring out the workaround to run the machine that the x servo bearings were shot. Pulled the x servo motor (out of the coolant it had been soaking in) and replaced the bearings and brushes. Works good (and quiet) now but still get 139 error when y gets close to home.
Is the wiring harness shorting out?
Thanks in advance for any constructive commentary.