My Supermax has landed. This knee mill has both horizontal and vertical spindle motors. They are 5 hp. The vertical spindle will start with my 3 phase converter system, but repeated start/stop/start/stop will trip the breaker. The horizontal spindle trips the breaker unless the drive belts are removed. And then it "just" starts. Running load is just a few amps and I know I'll never go to full horsepower cutting.
I have a 30 amp breaker on #10 wire going to a homemade "Fitch" RPC. Then #12 wire throughout the shop. I can't read the nameplate on the RPC motor - I think its a 3 hp.
I'm looking for suggestions to be able to start this mill without a complete re-wire job. Some kind of soft start?? larger RPC pony motor?? I'll consider a VFD only as a last resort.
Otherwise, this is one serious mill. I can now look down my nose with disdain for those folks using a Bridgeport.