Re: [CAD_CAM_EDM_DRO] Need opinion on this motor please........

mmueller@... wrote:

> I have access to a few motors of the following specs.
> Would these work well for a CNC retrofit on a small Shoptask?
> Thanks,
>
> I belive these are DC Servo Motors
>
> Most of these figues I have no idea what they mean:
> MOTOR SPECS:
>
> 1) MOTOR Kt: 42.43 +/- 10% OZ-IN

This is most likely Oz-In / Amp, and tells you how much torque you get
per amp of armature current.

> 2) MOTOR TERM. RES.: 3.56-4.82OHMS

A little high, considering the peak current rating! You can't use the peak
current very often, or for very long, or the motor will smoke! 11.8 A (squared)
* 4.82 A = 671 Watts!

> 3)MAX TERM VOLTAGE: 90V
>
> 4) MAX CONT. SPEED: 2900 (NO LOAD)

A good indication - the motor is optimized for the lower speed range, which is
desirable.

> 5)MAX PEAK TORQUE: 450 OZ-IN

A good rating in that respect.

> 6)MAX PEAK CURRENT: 11.8A
>
> 7)MAX CONT. STALL TORQUE: 105 OZ-IN
>
> 8)MAX CONT. CURRENT: 2.7A
>
> It has five wires, which I assume are two for the +/- for power and
> two for the tach, with one left over(ground?)

A good guess, but you might want to trace the wires before going
further.

> Can I use the GeckoDrives for these and if so, which ones.

I don't think you can get full torque or full speed out of the Gecko,
as it goes to 10 A peak, I think, and about 70 V. That may be good
enough, however.

Jon