Quote Originally Posted by dachopper View Post
The only original parts are UC400ETH, UCCNC + PC software and hardware, Spindle, motors + wiring..

More clues, just had fault number 3 for today on video, I had everything running, but no drill bit in the spindle, ( All electrics on and running, spindle was turning but with no BIT. This time the X axis jammed during a left to right travel movement. just after reaching retract height, under no load. AM882 stall detect SHOULD have picked up this stall, it was at 450rpm, but it didn't........ some kind of electrical interference?

Did another RUN everything turned on again, but this time the spindle freewheeling ( inverter powered but no power to spindle ).....18 minutes later, no fault

Ill do another run with the spindle rotating, but everything else turned off..... then I can be positive somehow spindle interference is causing the dam issue.
When I got random estops awhile ago I plugged the invertor into a socket at the other end of the workshop via a 10m cable reel. No issues since.