Roland, Exactly, this is easy to conceptualize; the gap is in moving to implementation. I can conceptualize lots of things I cannot do. Darned; life is that way. ;-)
more comments below. Dave On Jan 29, 2007, at 6:33 PM, Roland wrote: > At 09:31 PM 28/01/2007 -0800, you wrote: >> Hi Karen, >> >> There is some interest in this kind of functionality within emc. It >> would be handy for either sinker or wire edm at the least and you >> apparently have thought of another use. >> >> If one can program in Tk/Tcl then modifying tkemc to provide this >> kind of movement should not be too difficult. No one has done this to >> my knowledge. > > I don't understand why(conceptually) this is so hard to do. > Notwithstanding that servo loops are involved in generating the > steps, at the end of the day, a step sequence(presume steppers) is > being sent out at the parport. If this sequence was sent to logging > file, surely it could be run back or forth. > At this stage, it's simply a step matrix, maybe a spooling buffer > of 1000 x3axis steps. In the application of wire EDM, you probably > only want to extract the wire, so stepping back at a slowish rate > would be acceptable? The GUI might reflect 'steps' rather than g- > code for this function, but this may be acceptable. I'm being quite stubborn about this; at least at this point. It needs to run under emc and it should be a generalized solution not just for steppers. With that said I do know of a person that is working on exactly the approach you suggest. It is a stand-alone program and not part of emc. My opinion is that we need a list (log) within tkemc or some such interface that inverts G2/G3 and then can be stepped back thru on external command. > > In use, one might 'pause' the machine, and step back, for whatever > reason, then fowards again to '0', then resume the program code. > Reasonable? > > > Regards > Roland Jollivet > > > ---------------------------------------------------------------------- > --- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to > share your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php? > page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
