Re: [CAD_CAM_EDM_DRO] axis clamps/brakes was Re: Measuring backlash more accurately?

ballendo wrote:

>Jon,
>
>I understand that is the case in your "real" servos (or any "real"
>servo system). What I was wondering is if it's still true for a "step-
>servo" system?
>
>

It depends on the circuitry. You should ask Mariss about the Gecko.
On my servos, there are linear op-amps that will continue to increase
the PWM duty cycle until movement is started, as sensed by the
DC tach. I think there is a digital version of this on the Gecko Servos,
too. It probably has much lower gain, due to the digital nature, and
the discontinuous-time response of the encoder, but it will still
deliver strong current to the motor. This might overheat the motor
or the drive, or cause a fault.

Jon