RE: [CAD_CAM_EDM_DRO] Wire Edm

Most of them just look at the current to control the feed rate.

Brainstorming aloud,

The easiest way is probably to setup something to monitor the current and
convert to a voltage you can feed into the PC.

Then set you own feedrate in your program in something like mach. Use some
VB script to adjust the feedrate override based on your current input.

If there is a rapid rise, i.e. short circuit, possibly above a max current
threshold then halt the program, with draw the tool, possibly step back a
line and let it continue from there.

There may be a feature of one of the drill peck cycles you could play with
to achieve this.



Just some thoughts, but I think along the right lines to get us started.



Dr. Mark Vaughan Ph'D. B.Eng. M0VAU

Managing Director

Vaughan Industries Ltd, reg in UK no 2561068

Water Care Technology Ltd, reg in UK no 4129351

Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
Phone/Fax 44 1872 561288

_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of rocketscientistnate
Sent: 11 March 2007 22:09
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Wire Edm



I have an OLD Japax wire EDM, that I traded a techincal school out of.
I've thought about retrofitting it, but don't know the first thing
about the electronics inside of one of those. It works fine, but
somehow the box that switches between manual and tape operation was
lost in transit (they disconnected it before I got there). I had
considered rewiring the stepper motors to run on a PC, and let the
machine think it was in manual mode, but I now believe it has to sense
the gap between the wire and part to get the right feedrate. I would
be interested in any info you guys could give, or would gladly take
offers to buy it. It takes up a lot of room to not be working, and I'm
still saving for a new Tormach ;) Pics are posted at
www.clymermachine.com

Thanks
Nate





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