Re: [CAD_CAM_EDM_DRO] Re[1]: wire edm info ( was Safety/Reliability )

In a message dated 11/05/2000 6:31:42 AM Hawaiian Standard Time,
Ian@... writes:

> To do this, presumably,
> the CNC part of the setup must have a way of remembering the exact cut
> direction for the previous few steps so it can back away from the cut in
> this same direction without the wire shorting onto the sides of the cut. I
> don't think actually making the mechanics of a wire machine is a problem at
> all but this sensing and feedack into the CNC is a real stumbling block and
> so any insight you could give into this aspect would be a real help.
>
> Ian
> --
> Ian W. Wright
> Sheffield UK
> www.iw63.freeserve.co.uk
>

Ian,

I watched some wire machines cut. I don't think they move backwards. I
could be wrong as the movement could be microscopic. Seems to me they slowed
down on large cuts, speeded up smaller cross sections. Perhaps they sense
current and speed up when the current goes down and slow down when current
goes up. The cutting looked to be continuous.

Peter
THRD, Inc.




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