Re: [CAD_CAM_EDM_DRO] Re: stepper to servo transition

Hi Bruce,

Unlike steppers and brushed servos, you have to be very careful when
mixing and matching brushless motors. Some motors use hall effect
sensors for commutation. Most of these can be used with the Rutex
drives. Some motors use the encoders for commutation but the data from
the encoder tends to be proprietary (sp?) so it only works with that
manufacturer's drives.

Will you be using slip rings for this job? Slip rings can be quite noisy
and you could have problems with your encoder and hall signals. Actually
thinking about it, you may be better off having the drive after the slip
rings. At least then you will only have to worry about the
step+direction signals. You may still have to use an optical or rotary
transformer based system for reliability.

Les

Bruce Shapiro wrote:

>
>
> Thanks for the "welcome," Graham, and the insights, Les.

>
> Does anyone have epxeriences they will share with regard to using
> Rutex's drives (in particular, their brushless model)? How about
> World Servo's SST drives and motors?
>
> These are the drives I'm considering (as well as Parker's more
> expensive Aries and Gemini line). I'd love to try a Gecko, but I
> really need a brushless system (this thing will be 50' in the air
> and operate ~12 hours/day, 365 d/y.
>
> Bruce
>