Re: [CAD_CAM_EDM_DRO] CNC Closed Loop Control??

Is the update rate from the DRO sufficiently high to be able to form a
closed loop control? If it isn't then you will not be able to move very
quickly nor with a very high loop gain. Also don't forget that if you have
any backlash in the mechanics it should be minimised otherwise the system
may hunt.

Regards Peter

----- Original Message -----
From: <p0p0k0pf@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, February 11, 2003 2:37 AM
Subject: [CAD_CAM_EDM_DRO] CNC Closed Loop Control??


> This is my first post here and I have a question!
>
> I plan on installing DRO and CNC on my Shoptask Eldorado
> Drill/Mill/Lathe, and i was thinking...
>
> Is there such a thing as closed-loop CNC control, where CNC step
> input is based on the output measurement on DRO scales?
> Theoretically, this would eliminate or check any backlash or step-
> jump issues...
>
> I like CNC for all its attributes, but I like DRO for it's absolute
> measurements...it seems like combining the two separate systems would
> be the best choice.
>
> I am no programmer or electronics expert, so I have no way to go into
> further details, but does anyone have any ideas on the matter?
>
> Thank you!
> Jason N.
>
>
>
>
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