Romi 13-5 460v to 230v

Dalt1028 · May 27, 2021

just purchased a Romi 13-5 lathe and I can’t for the life you me get it to run on 230v 3 phase. I change the wiring in the Motor to low voltage. What am I missing

DDoug · May 27, 2021

Dalt1028 said:
just purchased a Romi 13-5 lathe and I can’t for the life you me get it to run on 230v 3 phase. I change the wiring in the Motor to low voltage. What am I missing

The "control wiring" ?

Dalt1028 · May 27, 2021

Please explain. I’m very new to all of this.

DDoug · May 27, 2021

Dalt1028 said:
Please explain. I’m very new to all of this.

You have push buttons and contactors on this lathe ?

BT Fabrication · May 27, 2021

find an electrician....

swarfmeister · May 27, 2021

Assuming the control voltage is 110, you need to rewire the main motor, and the coolant pump motor if any, rewire the control transformer for the proper incoming voltage, and adjust or replace the motor overloads for the proper current. Also, some lathe controls like the LeBlond servo shift controls are phase sensitive and won't work properly if wired out of phase (direction of rotation wrong).

Mr Bridgeport · May 27, 2021

What swarfmeister said. I used to install these machines and from memory I'm pretty sure there is a control transformer. If that is not rewired it will only put out about 60VAC, not enough to pull the motor contactors in. Also the overloads will need to be doubled in size or they will keep tripping out. I think the coolant pump is 3 phase as well, rewire that for 230V.

Mr Bridgeport

bikebuilder · May 29, 2021

Try over at garagejournal... some very knowledgeable and patient folks over there.

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Romi 13-5 460v to 230v

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