HLVH EM wiring situation

Just received my imported machine from Peter at Veltman, and Im wondering about the wiring. Anybody have a 230v machine that can walk me through switching mine from 380 to 230? Or point me in the right direction. Thanks

Jason

Did you get the wiring diagram that should be in the metal pocket of the electrical cabinet door? If not, look for the wiring diagram part number on the electrical dataplate on the outside of the door and post that. I do have some pdf's of some of the wiring diagrams. There are also some that are posted in the files section. I have heard that there are dual-voltage main drive motors, but I have never seen one. I have owned about 8 Hardinge lathes and worked on a couple more - never seen a dual-voltage motor. When I had a 440volt Hardinge HLV-H, I used a 3-phase transformer running in reverse to boost the voltage from 240vac to 480vac. That worked just fine. It sounds like you got a European lathe and I must confess that I have no idea of what you bought. On the Hardinge group on facebook are a couple of former Hardinge employees from the UK that may have a much better idea of what you have and what you need to do. One of them is "SupersonicSid Stone".

As far as I know, I think they are only able to run on the power that is specified on the tag on the electrical cabinet. Many years ago a friend made the mistake of buying a 575v HLVH, a Canadian machine. His solution was getting a step up transformer or having to swap out the spindle motor, coolant pump, lot of the wire harness, etc.

Check your spindle motor and coolant pump tags. Should say the voltage, if they say 380, you may be stuck getting a step up transformer.

Look at every motor specification tag.
- main motor
- feed motor
- speed change motor

Identify any transformer(s) in your control box.
Identify all contactors and what their coil voltages are.

There is always the VFD conversion which some others have done.

The least changes required; use a step-up transformer.

Ron, would you run a slightly higher voltage? Say 400 or 440? I was told by the seller that it would run slightly better on high voltage due to the difference in hertz. Any thoughts to that?

rons said:

Look at every motor specification tag.
- main motor
- feed motor
- speed change motor

Identify any transformer(s) in your control box.
Identify all contactors and what their coil voltages are.

There is always the VFD conversion which some others have done.

The least changes required; use a step-up transformer.

Click to expand...

If a motor plate says 220 Vac and the utility is measured at 245 Vac then I have a choice to use a transformer or just use what's there.
In you case just jot down all existing coil and motor volts. Then report back.