I don't entirely agree with the answer below. It may be that the
electronics are fried but I doubt that the use of a thin wire (even if
it got hot) would be the cause.

All modern VFDs detect the under voltage condition and will (or at least
should) shut themselves down when they detect the condition. They also
detect shorted leads between themselves and the motor and shut down
without harm -- or, at least, they should. The ones I use do.

So, if the wire was big-time under sized, the IR drop on the wire would
give you a low voltage at the input to the VFD and it should shut down
properly.

Question -- I can't remember if you can see the vfd display on that
machine or not. If so, when you power down one which is working
properly, it should run for a few seconds and then report under voltage
as it goes to sleep.

Bill

triker3 wrote:
"MGH" wrote in message
...
Group,



Need help/advise. I am a high school shop teacher. We have a Delta DL40
16"electronic
variable wood lathe. It quit working the other day. I replaced the power
cord, it had more electrical tape than plastic. The cord was replaced
with
a lighter gage wire than original (I know mistake).

The lathe and electronics all worked, as it should. After a short period
of
use the lathe shut down. I noticed the cord had gotten warm and the lathe
would not restart. I replaced the cord with an appropriate gage wire,
checked the F1 fuse it's good, F2 and F3 fuses soldered to the circuit
board
also look good. When the red on/off button is pulled to the ON position a
relay on the circuit board clicks but no LED readout lights on the
microprocessor control panel. I moved the microprocessor control panel to
the alternative location with the same results. We have a second
identical
lathe and replaced the microprocessor control panel on the working lathe
and
the panel worked fine. Did I fry the electronics by having a to light gage
wire? I looked for a thermal overload button on the motor but haven't
found
any. Besides the motor never got warm much less hot. Also, there was
never
that hot electrical smell. Any suggestions would be helpful and
appreciated.



Gay


Sorry to tell you this but you probally have fried the electronics. Some of
these things are very touchy if the anp or voltage get out of wack, which it
probally did as you said the light gague wire did get warm, indicating a
high resistance which will drop the voltage.