Re: [CAD_CAM_EDM_DRO] Re:Re: Encoders

At 05:45 25/12/2003, you wrote:

>Gecko step and direction servo drives don't seem to care about the pulse
>spacing. The pulses just drive an accumulator that is used to drive an
>comparator. The other side of the comparator is driven by an accumulator
>that is drive from the encoder. The comparator provides the error signal
>to drive the servo amp section (this is not a detailed analysis of how a
>G320 works, just a high level view). So you don't have the problems you
>see with steppers being driven with an erratic pulse.
>
>As far as the encoder count, I aim for a step increment of about .0001 -
>.0002" with G320s. So you have to look at any reduction between the
>motor and the screw along with the screw pitch and figure out what you
>should use.

Tim -

With G320 & G340, what is the relationship between the number of steps
input, the encoder resolution, and the resultant motor movement? The
literature on the Gecko website doesn't seem to make any statements about
this that I can find.


Regards,
Tony