I am not familiar with your phase convertor but if is not a rotary or a new digitial phase convertor (phaseperfect) I have alway understood that solidstate PC would not drive a CNC.
Also the phase convertor should be twice the main motor, ie a 20HP phase Convertor for a 10hp motor. Your 1992 VF1 should have a 7 1/2hp rated at 10hp motor if I remember right, my 1992 VF-0 has a 5hp rated at 7 1/2 hp for short bursts of power.
I run mine on a 20 hp rotorary. I also isolate each machine to it's own convertor after frying a Fanuc control trying to run both a cnc lathe and a hass mill on one 30 hp convertor. I do run a punch press off the same PC that is running the Mill but that motor is very stable in it's opertation once it is started. I usually start that motor if I am going to run that machine before I start the haas and just let it run. Shutting it down is not a problem but restarting it is as it throws the phasing of on the Haas. Not a problem really if you are not cutting at the time but wil give you errors and crashes if you are.
The rotary phase convertors really don't use that much power when they are running. Also make sure your rotary is balanced for a CNC machine with no more than a 5% fluxuation in power. This means that the PC will include a switch box with capacitors and balancing switching in it. They do make noice and heat so plan for that. I have them in a leanto out side the shop with the compressor.
Lowell  |