Re: [CAD_CAM_EDM_DRO] Re: CNC Router belt drive

Both steppers and servos will actively hold position and resist any
attemps to move them. Both have a little bit of 'give' so a large load
will deflect them slightly but the deflection should be too small to
make any difference.

Holding torque for steppers is the maximum torque you can apply while
the motor is stationary before it lets go and loses position.

Stall torque for servos is the maximum continuous torque you can apply
to the motor while it is stationary. This isn't directly comparable to
stepper holding torque because they can handle much higher torques for
short periods of time. This is one big advantage of servos. They can
handle overloads for a short time with no problems. Overload a stepper
and it will lose position.

Les

wgaybba wrote:

>Hi
>
>Thanks, I now understand the belt drive. But I don't think I fully
>understand the stepper motor and servo thing. If the machine is busy
>cutting something on x-axis and y is standing still. Does the
>electric drivers apply electricity to the y motor to prevent it from
>moving? Otherwise the force of the head cutting could make y move. Is
>this what they call holding torque or stall torque in the motors
>datasheets?
>
>Thanks
>Wayne
>
>
>