Quote Originally Posted by Clive S View Post
What you basically must NOT do is put any form of switch between the VFD and the three motor cables going to the spindle or unplug the spindle with the VFD running.

If you do you might hear a big bang.
Wouldn’t that turn the spindle into a generator with nowhere to send the juice? Plus does the power run a cooling fan?

One thing I didn’t specify in my order was a breaking resisistor. Do I need one?