Re: [CAD_CAM_EDM_DRO] servo control

binoyshenoy wrote:

>How does a servo motor lock in place? What kind of excitation should
>be given by the drive?
>
>

An encoder senses position, and the drive or computer sends a correction
signal if the motor drifts off position. Some servo drives also use a
tachometer
that allows the velocity to be kept constant even between encoder updates.

For a brush DC motor drive, there would be a voltage applied to the motor
to get motion in the proper direction.

Jon