VFD settings for Mill - Do I need to change anything?

Mark Hubler · Dec 7, 2002

I bought a replacement 2 hp, 3 ph, 1750 rpm motor and vfd from Dealer's Electric, for my Bridgeport copy mill. I noticed that there are many settings on the TECO/Westinghouse FM 100 vfd, are there any that I should change from the factory preset to optimise it for a mill?

I plan one occasionally running the motor up to 90 hz, for small mills and drilling small holes. Otherwise, standard milling operations (4" flycutter, endmills up to 1 1/4", aluminum and carbon steel fabrication, boring bar, drilling, etc.)

This is my first vfd, so I would apreciate any help.

Scottv · Dec 7, 2002

Mark, I bought the same VFD for my mill.Here is what I changed on mine.
( fnxx 70 reference amps punch in motor nameplate current )

( fnxx 6 frequency upper limit )
( fnxx 7 frequency lower limit )
( fnxx 11 frequency command selection #1 controlled by keypad frequency setting potentiometer )

That should get you going,there is a few more you might want to program for remote controls.That will get you running.

Richard · Dec 7, 2002

Hi,

I've got a motor and VFD on the way. Did you have any trouble mounting the motor and hooking it up?

Thanks,
Richard

Scott V · Dec 7, 2002

Richard,I didn't have any trouble.I used my factory motor with the teco fm 100 2hp vfd.It was on a small clausing horizontal mill.Probally just mounting your motor will be your toughest job.After that your home free.I am really happy with my setup.I bet you will be too.

Good luck,but I don't think you will need any. Scott

Mark Hubler · Dec 8, 2002

My mill is 18 years old, made in Taiwan. The original motor was a single phase, 2 hp 120/240 volt, about 9" in diameter, and not anywhere close to any NEMA size for shaft diameter, keyway or general dimensioning. To get the new motor to fit, I built an adapter to match the bolt pattern of the original motor and drop the motor about 3/4" to maintain pulley alignment(looks like a disc brake hub). I made a custom keyway, and rebored the pulley.

Thus mounting the motor is the hard part. Wiring is easy, 2 - 220 volt hot leads and a ground to the vfd and 3 hot leads and a ground between the vfd and the motor.

Richard · Dec 15, 2002

Hi guys,
I got my motor mounted and VFD hooked up. It's really cool.

What did you set as the upper limit for the frequency?

Scott V · Dec 15, 2002

Richard,From what I heard about 90 hz is safe.I don't know if your spindle bearing will handle that much.

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VFD settings for Mill - Do I need to change anything?

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