Re: [CAD_CAM_EDM_DRO] Can you make a close loop system using digital calibers?

At 02:14 26/10/2005, you wrote:

> >I did a search but could not find the answer so I have to ask. I want
> >to convert a mini-mill over to cnc and currently have Chinese calibers
> >mounted as DROs but I have not done anything to reduce backlash. I
> >know the signals can be read by a DRO box by ShumaTech and there is
> >also an adapter to convert the signal into the more uniform standard.
> >
> >
>No. The problem is the calipers only produce about 2 readings a second.
>You need something that can produce at least a hundred readings a second
>to begin to do closed loop motion control with it. We usually use 1000
>readings
>a second with EMC, but some users demand even more.

There's a system available in the UK that uses these scales to display on a
PC screen - the software uses the communication protocol that the scales
understand to force a much higher reading rate - every 50 millisecnds I
believe.


Regards,
Tony