I dunno if this is too simple for ya, but there is a spot where 3 little
wires run into the spindle motor, take them out. Attach those 3 little
wires to the VFD input, attach 3 more little wires to the VFD output and
run them to where the first set used to go, on them motor. LEave the
gearmotor alone.
If your contactor is anything fancier than an overload heater you may
have to deal with that

wrote:
william_b_noble wrote:

maybe I'm getting dense, but your question doesn't make any sense. I

have a

logan/powermatic with a reeves drive and a VFD. the VFD is wired

directly

to the motor as it MUST be. this is electrical and in no way affects

the

operation of the reeves drive. I removed the contactors and barrel

switch

and let the VFD do that work.

If this didn't answer your question, please clarify a bit......


wrote in message
groups.com...

I am getting ready to put the VFD on the lathe and had a question.
Should I wire the VFD to the regular lathe circuit box or directly

to

the motor. If I go directly to the motor I have no control over the
variable speed.

If I wire the VFD to the circuit box then I can use the analog

inputs

for stop, reverse, frequency, etc. on the VFD and still control the
variable speed pulleys. Can I still power the lathe on using the
original button or do I have to use the VFD?

Will use of the VFD this way damage the contactors etc. in the

circuit

box or damage the VFD?
The motor is a 3 phase/ 3 horse and the VFD is a 5HP unit.

Thanks




Well William, my Sheldon has a mechanical variable speed drive and it
is adjusted via a gear motor. The gear motor is run from circuit box
off of a transformer apparently. So if I run the motor directly from
the VFD how to you suggest that I operate the gear motor without
running another run of wires to the transformer which is impractical???
Please let me know. Thanks, Steve