I guess the point I am trying to make is that over the last 30 yrs or more since the advent of CNC machining and the inclusion of sophisticated electronic controls, a certain standard has evolved (usually the hard way) as regards the methods of wiring etc, I would suggest that any manufacture that does not heed these lessons is asking for problems.
I know in my experience of retro-fitting machines, I have occasionly taken a short cut, to my regret.
It is very unusuall to supply a shielded cable and not at least ground one end as this usually defeats the purpose and might even cause problems.
One only has to look at most major servo motor manufacturers and amplifier suppliers to see what they recommend as to their equipment and they all appear to conform to the industry standard way of wiring.
Some manufacturers of machine tools even go to the extreme of recommending a ground rod be driven in next to all their machines to avoid earthing problems.
One of the definitive publications on this subject is a manual put out by the National Fire Protection Assoc. entitled Electrical Standard for Industrial Machinery. This basically is an enhanced version of the Electrical code to cover machine tools.
Al  |