On 2008-05-19, Jon Elson wrote:


Ignoramus24782 wrote:
On 2008-05-18, Jon Elson wrote:

Ignoramus8671 wrote:

Then he showed me his Hardinge HC chucker. It did not work right. He
never ran it because of it. He hooked it up to his phase converter and
it ran, however the speed adjustment knobs never worked.

After a few minutes of running some "click" was heard and it stopped
and would not restart.

There is probably a motor starter with a thermal overload. Most
of those have to be manually reset. Usually there is a reset
button on them. But, there must be a problem causing excessive
motor current to cause that to trip. My first guess is to check
that the motor is not wired for 440 V. If it was originally,
then the thermal heaters in the motor control have to be changed
for 240 V, as the current will double.


Yep. That was my suspicion too. I asked this question. The guy said
that according to the seller, "the lathe was wired for 208v".

In my experience, 440v motors just flat out do not run on 220, but the
lathe ran OK.

Yes, but the MOTOR may have been rewired for 220 without changing the
heaters in the starter.

This is a single voltage motor. 208

Otherwise, it could be a problem with his phase converter. If it is far
out of balance, it may be good enough to start the motor, but then there
is a big circulating current between the converter and the lathe.

That could be. He had a lousy multimeter, I forgot to take mine, so it
was hard to ascertain.

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