Re: Does anyone earth out their huanyang spindle? Or spindle at all?
4 wires to the motor. The 3 power wires, and a ground. Earthing the shield at both ends will probably cause problems.
Earth it at the VFD end only. Reason: if only connected at one end current cannot flow through it.
Read the PDF Al posted. It recommends complete bonding all place all ends, but unless you do all the the bonding processes, leaving the motor end of the shield unterminated will probably be best.
Always run a separate earth lead and never use the shield for the earth path.
If you only have a 3 wire shielded cable, run a separate earth wire tie wrapped to it.
Super X3. 3600rpm. Sheridan 6"x24" Lathe + more. Three ways to fix things: The right way, the other way, and maybe your way, which is possibly a faster wrong way.