Re: [CAD_CAM_EDM_DRO] Re: Servomotor with Encoder sources

thomasm923@... wrote:

> Is it safe to assume that any motor sold with an encoder on it can be
> used as a servo motor? My gut feeling says no, however I feel that I
> should ask anyway. There is a motor at C and H Sales that looks nice
> but it is not labeled as a servo even though it has an encoder on it.
>
> Here is the link:
>
> http://www.aaaim.com/cgi-
> local/shop991/shop.pl/SID=7619663475/page=DCME.htm#DCME9950

Not necessarily a safe assumption. In general, a motor with an encoder
has a good chance of being a decent motor, but its qualities for servo
position control of machine tools may not be a good match.
For machine positioning applications a motor with minimal torque
ripple and velocity ripple, as well as high torque at low speeds is the
recipe. A motor that has peak output at 5000 - 10000 RPM will not fill
the bill without a high reduction ratio. A motor with peak output around
1000 - 2000 RPM is much better, and will drive a machine tool with
a low belt reduction ratio, or even direct drive.

Jon