Re: Strange Servodrive

--- In CAD_CAM_EDM_DRO@egroups.com, phil@p... wrote:

> Mariss,
>
> Couldn't the integration problem be solved by using a

microcontroller

> to do the PID ( in software ) and generate the PWM signal?

Basically

> eliminating the D/A and the other analog circuitry... Would the

same

> problem exist in a software integrator?
>
> Regards,
>
> Phil Covington

Hi,

The problem is not the integrator; it is simply doing what it is
supposed to do, be it software or analog. The problem is the encoder
providing no position information between edges.

The world is analog (at least in the macroscopic scale). The output
from the PWM would still be an analog torque command and zero torque
is unobtainable.

Any external disturbance that would cause an encoder edge transition
would still result in the motor heading the opposite direction
without feedback until it moved the encoder 1 increment. Then it
would repeat,(dither).

Mariss