Re: Still a bit unclear on proper spindle grounding
Originally Posted by
QuinnSjoblom
I've heard from multiple sources that shielding is not supposed to be grounded at both ends for it to shield properly. Is this not true?
This occurred originally with the implementation of relatively low voltage control systems, CNC etc used in conjunction with high voltage machine/spindle control etc.
The concern was that it could encourage ground loops to occur, inducing noise into low voltage cables, since then it has been a recommended practice to implement something called equi-potential bonding, this is ensuring that each part of the machine and motor frames have a earth conductor, preferably sourced from a Star point ground.
This helps ensure that no difference in potential occurs in any part of the machine and allows earthing both ends of shielded cables.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.