Re: [CAD_CAM_EDM_DRO] Re: DC feedback motor

cadcamcenter@... wrote:

> > cadcamcenter@y... wrote:
> > > Is a DC feedback motor with 5 plus 2 wires the same as a servo
> motor?
>
> > Jon wrote:...... But, 'DC Feedback motor' is a pretty vague term.
> Is the MOTOR DC, or is the Feedback DC? Not clear.
>
> Don't know. These are the only info given on an eBay auction item.
> For Gecko 3XX, can I use any old dual shaft stepper, add a quadrature
> rotary encoder to it? Will this turn a stepper into a servo?

No. A servo motor is not, generally, like a stepper. Servo motors come
in DC brush, DC brushless, AC permanent magnet (which is nearly
indistinguishable from "DC brushlesss") and AC induction. (There are other
types that are quite rare).

The gecko Servo drives need a DC brush motor (or one of the exotic
DC brushless motors with internal electronic commutation, meant
as drop-in replacements for DC brush motors).

A stepper with an encoder is not a servo motor, it is just a stepper with
position feedback.

Jon