Dave Engvall wrote:
> I have no idea if this email still works for Pete. Pete developed a dos app 
> for steps-> servo that  was pretty cute, including a C axis. 
> As a demo he threaded a file with it. 
>   
OK, so he wasn't using EMC/Linux for that.  it was still PLENTY cool!  
He had burned a number of
interesting patterns into old files.
> EMC does have the capability of limiting or stopping feed in a wire edm setup 
> but no ability AFIK for backing out necessary for sinker edm. 
>   
If you have good flushing and a system to shut down the feed and pulser 
if a short develops,
you may not need the backing up, but that would still be a really good 
thing for EMC to have, some day.  But, really,
if you are doing a sinker job, you don't need G-code.  You position the 
X-Y to put the pattern where
you want it, and then need some scheme that could be rigged through HAL 
to control the Z axis
based on the EDM current.  If you wanted to get real fancy, you could 
even have G-code statements
that would set variables for start and end of burn, and these could be 
passed to a custom HAL component
that would monitor the burn and drive the Z feed.   Ummm, I'm starting 
to get itchy to make something!
But, first, I need a good pulser.  I know what I want to do, but just 
haven't gotten around to building it.

Jon

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