VFD

Dusty MI · Oct 22, 2014

Is a VFD practical on a drill press, or do you loose too much torque in low speeds?
And I would have to get a phase converter also.
I dislike changing belts all the time.

Thanks,
Dusty

Steve@Advance · Oct 22, 2014

It should work quite well for you. You wouldn't need a separate converter, just get a single to 3 phase inverter, size it to your motor.

Depending on your load demand it should still have enough torque. Most will let you overdrive the motor, so you can keep it in a lower pulley ratio for torque, then overdrive it for faster spindle speed without having to change the belt.

David G · Oct 22, 2014

You will lose some torque at low speeds, that is inevitable, but you will not need a phase converter. I would plan to have the VFD go from 50% to 100% speed.

You will need to oversize the VFD if feeding from single phase.

David G · Oct 22, 2014

Here is a link to the new Allen Bradley VFD line, we are putting quite a few of them in, they come in single and 3 phase.

http://ab.rockwellautomation.com/Drives/PowerFlex-525

Pretty cost effective now.

Wile E · Oct 22, 2014

What I like is the VFD on the import milling machines out of Taiwan. Acer is a brand I have seen, looks like a real ease to run, even over a standard Bridgeport Mill.

VFD

Dusty MI

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Steve@Advance

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David G

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David G

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Wile E

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