On Sun, 18 May 2008 20:10:13 -0500, 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.

And you have to re-jumper the control transformer, main contactor
coils and any other line-powered gear inside from 480V to 208/240V.

And if that power is coming from a phase converter (either kind) all
the control power has to be coming from the two "real" phases - the
'manufactured leg' can only be used for the motor load(s).

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.

They'll sit there and hum, and if you spin them up with a pull-rope
they'll try turning for a few seconds and stop. DAMHIKT, of course -
it even had me going "???" for about thirty seconds...

"But it ran just fine at the used machinery brokers..." snapped me
out of it.

-- Bruce --