Dear Guys,
I am a surgeon in the UK so you may have to bear with me on technical matters (on both counts.) I was directed here after seeing Robrenz's fantastic videos on youtube.
I am restoring a 1957 lathe. It has a 2 speed 3 phase motor, - 3.75HP and 7.5HP. I have a 15HP rotary converter to power it , - professionally installed to the garage with a 10mm 60amp supply. The electrician however didn't know much about connecting it to the lathe. It works great at low speed. When I try to start the motor in fast speed it seems to overload the converter. Phoned the converter manufacturer. I tested the voltage drop on start up - drops from the UK 240 supply to about 230 for a second, then back up to 240, - so pretty negligible.
I think the three wires of the converter output could be worked into the switch in the wrong order but I don't know how to explore the circuitry to determine how to fix the problem. I have a multimeter and know the basics of how to use it. I enclose some photos of the switch, electrical panel and front control.
Any tips would be great.
ps proper 3 phase will cost me about $20,000, so I have discounted that...