Kit's Machine

[JAZZCNC]

The spindle is connected using screened 3-core cable with the screen connected to the mains earth inside the VFD and to the body of the spindle and hence to the frame of the machine.

If you have earthed your frame then surely you have created an earth loop by connecting the VFD cable shield at the spindle end.? I don't earth the spindle end and never have noise problems.

[Kitwn]

If you have earthed your frame then surely you have created an earth loop by connecting the VFD cable shield at the spindle end.? I don't earth the spindle end and never have noise problems.

Connecting the spindle cable braid to the spindle body has a lot to do with safety, there being plenty of volts available to spoil your day, though making sure the machine body is well earthed should solve that. Interesting point made earlier about grounding emissive cable screens at both ends and receptive ones only at one end. The principle of reciprocity may not support this however.

I have already got UCCNC running in demo mode on my laptop and have confirmed that delivery to Australia will not take too long so I can see his happening soon. How does UCCNC compare to LinuxCNC? How easy is it in practice to set up auto-squaring for a two-motor axis?