Spindle motor shuts off at start up and resets machine. HELP!

[Newby2]

When you start the spindle, take note of how much an incandescant light bulb dims, say a machine light, or a shop light. This will tell you if your incoming power is sufficient for the load. If the wire is sized is proper, you should only get a flicker in the lights, not a brown out.
Steve

[Helix60]

Unless you are really really paying attention to the light. There is no noticable dimming at all.

Regards,
Heli

Originally Posted by Newby2 When you start the spindle, take note of how much an incandescant light bulb dims, say a machine light, or a shop light. This will tell you if your incoming power is sufficient for the load. If the wire is sized is proper, you should only get a flicker in the lights, not a brown out. Steve

[Helix60]

I'll do the amp test tomorrow but I doubt it's pulling too much. If it were pulling enough to "Peg the Meter" I would see much more of a voltage drop. Had this problem once when my converter motor was the same size as one I would start from the RPC.

Actualy the "Phantom" leg is producing real power. If it wasnt you couldn't start a 3 phase motor with an RPC. The RPC is used by many for more than just starting another 3 phase. That is one of the reasons that your RPC should be 50% bigger than the largest motor you would run off of it.

I may just dedicate another motor for an RPC on this machine alone. I've got a few just lying around doning nnothing more than taking up space anyways. Might as well make one work for it's shelter .... lol.

Originally Posted by Newby2 Put a volt meter or an amp clamp on the leads from the RPC to the machine. You will probably peg the amp clamp at startup of the spindle motor. Also you will probably see a high voltage drop to the machine. Also bear in mind that your machine is actually running off the single phase power coming through the #10 wire, not the RPC which only generates the phantom third leg. A three phase motor will run on single phase as long as you can get it started but at a reduced horsepower. Steve

[in2steam]

Originally Posted by Al_The_Man I would think that is the way to go, either swing it over inside the machine, if possible , or install a separate internal 120v supply if necessary, fed from the 240v 1 ph. Al.

I would install a seperate control transfromer from the 240, saves haveing another breaker and possble ground issues.

chris