Originally Posted by
gar
070722-0619 EST USA
Machine frame, control chassis and circuitry common, and electrical safety ground should be tied together with a large flat wire. The electrical safety ground ultimately gets back to a grounding system (at least one ground rod) at the main breaker box.
.
I take some exception to this. Machine frame and any metal chassis to safety ground is imperitive, no issue there. Cricuit commons is case specific, and when treated improperly can cause havock. It is not something that should be just done without looking at the total system, including the utility system. It is probably the cheif cause of ground loops in systems.
Phil, Still too many interests, too many projects, and not enough time!!!!!!!!
Vist my websites - http://pminmo.com & http://millpcbs.com