My Powermatic 3520B is lit up when it is plugged in. The digital rpm indicator is shining away. This makes me think the VFD is powered and ready to go as well? I must admit that I haven't located the wiring diagram yet and thought I would ask here.
The concern was raised from a buddy of mine who has had some VFDs toasted in a power blip during a storm. He highly recommended that I disconnect the machine when it is not in use. He believes VFDs are quite sensitive to voltage spikes.
I am thinking of mounting a master switch/disconnect vs. unplugging it all the time. I did this for a PM drill press that shines all the time and it is much more convenient to throw a switch vs. unplugging it and then plugging it in when needed.
Two questions:
1. Is the VFD hot when the machine is plugged in?
2. Do you unplug/disconnect yours when it is not in use?
Thanks for the help,
Alan