Re: [CAD_CAM_EDM_DRO] Servo as a Spindle - Mariss?

Hi onecooltoolfool;

If you have a servo that performs well for tapping why not leave it in
place and use it for variable speed operation as needed? There is
not a great deal of difference between a PWM drive and a servo drive.
In fact I know of many instances where servos have been used for spindle
drives, you do have to make sure that the controller is capable of
handling velocity control.

There are a number of places to go for low power motors. Try bodine,
compumotor, pittman, and a host of others.

Dave


onecooltoolfool wrote:

>I want to use a DC brush servo as a spindle motor to give co-
>ordinated motion for tapping, but also have the motor run
>continuously fwd/rev. when machining as a regular spindle motor.
>
>I'm thinking it would be fairly easy to have a circuit that
>would "engage" the G320 servo drive for tapping and then switch over
>to direct DC or a PWM to act as a regular spindle motor. Aside from
>the ERR/Reset pause when "engaging" the servo drive, any problems
>with doing this?
>
>Brother tapping machines use a large servo as the spindle motor and I
>think they do something similar to what I described.
>
>Does anyone have any suggestions. This topic may have been covered
>before. Also, the availability of higher speed servos like 5000 rpm
>or more, in the size range .1 to .25 KW?
>
>Thanks, Joe V.
>
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