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

[dachopper]

Ok , Thanks Clive / M_C

I ended up running a separate ground from the spindle all the way back to the star, and from the sleeve all the way back , and another from the inverter power feed all the way back

The shock I was getting on the Z axis has moved to a different area of the frame ..... WTF !


I don't really understand how AC voltage is detected, but what I noticed is that I seem to have 12 Volt AC between my machine and the workshop floor, although the freq jumps. When I power up the anxillary devices, ( water pumps, spindle powered but not turning, and woodchip extractor on but not turning, the A/C jumps up to a constant 105-110 Volts 60Hz. I get a tingle touching the machine frame bearfoot after that.

Does this seem like an earth leak in the shed somewhere?

The machine frame was earthed to the same star point as the inverter / Dc transformer / spindle / spindle sleeve. I tried discnnecting it as I'm trying to figure out where the zapping is coming from.

All I know is that with the machine on and the DC steppers motoring, there is no problem and no zapping.

With the spindle relay on..... and spindle turning there was big zapping when the spindle rotated.... that is fixed , but now there is a smaller underlying zap that is on when the A/C power is on regardless if the devices are turning or not.

Should my stepper motor power sleeves also go to the same A/C ground? they are currently not connected? ( insulated both ends )