Servo motor used as spindle motor?

[fatal-exception]

Hey guys, just wondering if it would be a good idea to use a servo motor as the spindle motor. Seems that it would be easy to control using software, as far as on/off, speed control, ect.

The mills I currently have have 350W dc motors, no bigger than a nema 34 servo motor. They are rated at 6000rpm, which should be acheivable with a servo motor. I don't need a ton of power, but the contol from the software is an attractive option. They will be be geared down through pulleys to a proper R8 spindle.

Any thoughts would be appreciated.

Paul

[messar]

I'm doing what you are suggesting, and so far it's working OK. I'm using a 1hp emerson servo, and emerson drive in step and repeat mode on a Super X3. I changed the timing pulley on the motor side, and get around 4k rpm.

Matt

[vroemm]

I'm doing what you are suggesting, and so far it's working OK.

Can you cut steel with it ?
Or only weaker materials ?

[Lemo]

That only depends on cutter and spindle. The motor only drives that lot. Consider that there are mills with one half of a horse power cutting steel.
Lemo

[gridley51]

My Chiron mill uses the same type of servo motor for the spindle as the axis do.It`s a Siemens 1FT and a Siemens 610 axis drive.

[fatal-exception]

Thanks for the input guys! I think I will give it a try. If worse comes to worse, I have a spare motor and drive...

Thanks,
Paul

[vroemm]

That only depends on cutter and spindle. The motor only drives that lot. Consider that there are mills with one half of a horse power cutting steel.
Lemo

I was not worried about the strength of the motor.

(Dummy speaking. Plug your ears if necessary. :-) )
But the load on the spindle can change a lot and very fast.
Can the servo driver keep up with this ?