240 volts into a 220 volt machine ?

MorrisWoodman12 · 2024-12-15T09:01:34+0000

Minimal for the equipment I worked with. I would guess the same for a motor apart from rpm.

Sideways · 2024-12-15T10:27:57+0000

The photo shows a control box of a premium lathe with mention of an inverter.
Unless modified, this lathe is driven by a variable frequency drive.
The motor then doesn't matter. The electronics will take care of that.
The input voltage range of the VFD is all that matters and they won't care whether 220 or 240, 50 or 60Hz.
Crack on and use it ....

Sideways · 2024-12-15T10:30:00+0000

TheUnicorn said:
what is the effective of the Hertz?

In this case nothing because the VFD controlling the motor will contril speed, but on a generic induction motor, they run about 20% higher rpm at 60Hz vs 50Hz.

TheUnicorn · 2024-12-15T10:31:36+0000

ps.harris80 said:
One point to remember, whilst the USA and Canada have a 110v system they do also have the ability to supply 240v for certain higher power needs, this I suspect what the lathe is designed for. Now the question is would a motor designed for 240v 60Hz run ok on out 230 (ish) 50Hz supply. I suspect possibly yes but it may run a little slower than expected due to the lower frequency.

No expert though so more research will be needed

so as 60 is 120% of 50, would a machine designed for 60hz be 20% slower run on 50hz or am I just being too simplistic

edit - sideways answered my question whilst I was typing, sorry

Blister · 2024-12-15T10:41:09+0000

Inspector said:
The designations here are nominal, not absolute. I took a walk around the shop and the different motor data plates are marked with 208V though 240V (110V/115V/120V for lower voltage stuff) and they all run fine on whatever the power company is supplying. The 240V won't hurt the lathe. What kind is it? A Oneway or a General?

Pete

It is a Oneway.