On Feb 3 2013 4:57 AM, andy pugh wrote: > On 3 February 2013 13:39, EBo <e...@sandien.com> wrote: > >> What I am trying to figure out is how to configure EMC so that the >> electronics can return a "pause" signal until it has burned burned >> through the requested material, > > Adaptive feed _might_ work, but there is no way in the current code > to > run the path backwards. > EDM machines that I have seen running seem to have to reverse quite > frequently, so this might be a very difficult thing to get working. > > I don't know if the trajectory planner keeps the move history, if it > does then it might be possible to allow negative adaptive feed.
I was working on a very detailed reply before the circuit breaker tripped... Short answer is that decades ago I was shown a EDM head that could self retract a small distance (enough that you could feed in a couple of mm and the head would self retract via an analog current closed-loop feedback system). I was planning to build and modify that design a little to give me a "pause" signal and integrate that back into motion control. Anyway, I want to make some *very* small parts (the tooling is likely to be smaller that 0.01" diameter), and I can afford to make and break a bunch of these before I could afford to go out and buy a commercial EDM with capable specs. EBo -- ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_jan _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
