Re: [CAD_CAM_EDM_DRO] AC Servo's

On Friday 12 August 2005 11:32 pm, Jon Elson wrote:

> >I'd probably prefer a digital setup, but fear I may have to change both
> >motors and drives?
>
> Yes, keeping the drives is the best option, if possible. Some drives can
> accomodate a variety of motors, others are strictly proprietary. You need
> to check if the encoder has standard commutation outputs, or if the motor
> provides these (the typical Hall A,B C outputs.) Yaskawa servo pack
> drives use a proprietary scheme where the "Z" channel of the encoder has
> a phase relationship to the A and B encoder tracks that gives the drive
> the index position as well as the commutation info. So, both the drives
> and the motors are totally proprietary, and can't be used with anything
> else. A number of other makers have similar schemes.

Are you saying here that the encoders are also likely to be proprietary in
some way? Not exactly real high up on my list, I have a couple of units in
my box of motors that have encoders mounted on them, and you've got me
wondering...