The Dreaded X axis stepper error using UC400ETH and UCCNC !!!

[dachopper]

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

Ok - I've now noticed that the X axis jam that happened in mid air snapped the coupling in half.

Just ordered some different spindle shielded cable - siemens proflex EMV

I do have the spindle running in the same 50mm cable carrier as the X / Y motors... would this normally be ok? I don't think I've seen a DIY machine that doesn't run this setup yet?