Re: Servo Motors

Robert Neidorff wrote:

> From: Robert Neidorff <neidorff@...>
>
> Those Indiana General tape drive motors are VERY NICE DC brush motors.
> They are very well made and durable. However, as previously said,
> they are low horsepower.
>
> I have one which I got surplus. I ran it from a bench variable supply
> to see what it would do. I put as much as +60V on it and got it up to
> over 1500 RPM. With a belt speed reduction 5:1 or 10:1, it should have
> enough torque to move a Bridgeport table, but surely not direct drive.

I can't say for sure, but a 2:1 (or 3:1 at most) reduction ratio should
be sufficient. It depends on how many amps the motor can take
safely, and how much torque you get at that current. 25 in/Lb per Amp
at 5 amps or so is a good starting point. That gets you up to about
125 in/Lbs.

Jon