Originally Posted by
metlcutr55
question 2, possible lightning strike? its been that way around here, tho the lathe was off as was the rotary phase converter that drives it. reason i ask is l lost a desk computer to lightning about the same time. and insurance pays me for lightning damage.
I know of at least one customer of mine that loses a spindle drive often when electrical storms are in the area on a Alpha system, the last I heard he was looking at putting another 3 phase reactor on the line in.
It depends on the machine tool builder, but I believe the AC Control input is often connected to the Power Supply unit on those sytems, even when the main three phase contactor is off, this could mean that there is power on the Power supply control unit, until the main disconnect is switched off, which if you are shutting down for a couple of weeks, or even weekends, is a good idea to turn off.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.