----- Original Message ----- From: "andy pugh" <bodge...@gmail.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Saturday, December 03, 2011 1:26 PM Subject: Re: [Emc-users] Does emc2 support jogging backward/forward alongwith g-code?
> > On 3 December 2011 13:11, Yishin Li <y...@araisrobo.com> wrote: > >> approach #1: >> * have negative request-velocity for BACKWARD motion of current TC >> * replace tc-queue with circular buffer for bi-directional move >> * figure out how to feed the bi-directional circular buffer >> >> approach #2: >> * have negative request-velocity for BACKWARD motion of current TC >> * a dedicate FORWARD-tc-queue for FORWARD motion >> * a dedicate BACKWARD-tc-queue for BACKWARD motion > > This ties in rather tightly with the "jog/touch-off while paused" > issue and the difficulty with "run from line" both of which I think > are being looked at by other people, though I don't know if any coding > has been done. > > I have been thinking about it, and I think that the second idea is > probably best, a fixed "history" queue that describes the path that > exists in the metal, and a more flexible, re-computable "future" queue > that depends on the G-code not yet run. > The "future queue" has to be re-computable, as so much can change, > including the whole flow of the G-code, depending on variables and > offsets changing. "Run from line" is a particularly interesting > puzzle, but not directly linked to your question. > > I think that you would probably want to link this into "adaptive feed" > and "feed over-ride", simply allow these to go negative. > > -- This functionality ought to be very useful if implementing a Wire EDM machine when recovering from a short or even broken wire.. Best wishes John Prentice ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
