New to the forum. I am looking at a used Bridgeport that has been retrofitted with a Acer E-Mill electronically variable speed head(3HP). The inverter for the machine requires a 440V, three phase power supply. My shop only has 220v single phase power.
It appears I have two options:
1. Change the inverter to one that accepts 220V single phase- expensive and potentially complicated(I would imagine).
2. Use a single phase transformer to convert 220 to 440. Then use a rotary phase converter. Would this work? What size transformer would I need to use(7.5 KVA?)? Is it relatively safe to use used transformers that are available? Commercially new transformers seem to run about $500-600. Is it possible to use a step down transformer in reverse to step up the voltage? How complicated is the wiring going to be on this? Any downsides?
Let me know what you guys think. I don't want to buy the mill if I can't get the power worked out. Looks like this is already going to set me back $500-1000 for option 2. The mill is in good shape and local. Not a lot of offerings in the area for used BP's.
Thanks in advance.
Pat
It appears I have two options:
1. Change the inverter to one that accepts 220V single phase- expensive and potentially complicated(I would imagine).
2. Use a single phase transformer to convert 220 to 440. Then use a rotary phase converter. Would this work? What size transformer would I need to use(7.5 KVA?)? Is it relatively safe to use used transformers that are available? Commercially new transformers seem to run about $500-600. Is it possible to use a step down transformer in reverse to step up the voltage? How complicated is the wiring going to be on this? Any downsides?
Let me know what you guys think. I don't want to buy the mill if I can't get the power worked out. Looks like this is already going to set me back $500-1000 for option 2. The mill is in good shape and local. Not a lot of offerings in the area for used BP's.
Thanks in advance.
Pat