Re: Earthing spindle on Yuhuan VFD
If you have good earth bonding of the various machine sections, for e.g. earth wire from a moving gantry back to the star point etc.
In all the years of fitting VFD's I have never used screened cable, in fact when VFD's first came on the scene there was no such thing aimed at this application.
I have always used flexible metalic conduit to the spindle which by its nature is grounded both ends, the MTW/TEW wiring used was three conductors twisted together with the earth conductor ran along side them.
This has never ever been a problem for me.
You should find a point on the motor frame in order to use a ground wire point if non is supplied by the manuf..
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.