On Fri, 29 Jul 2011 15:31:49 -0500, you wrote: >All, > >I have a dual boot computer configured with both Windows/Mach and >Linux/EMC2.4.6. I ran Steve's code on both systems and the problem that he >describes is evident when running the code on EMC, but not on Mach. > >To answer Jon's question: > >> Does it start out running well, but then the slowdown develops later in >> the part program? > >No - The problem is apparent at the first G2 move. The machine appears to >change feedrate between G2 and G1 moves. Moving from one G2 line to another >G2 line is smooth, and moving from one G1 line to another G1 line is smooth. >G1 moves appear to run at around 60% of the feedrate of the G2 moves, so the >transition from G1 to G2 (or G2 to G1) makes the machine seem erratic. If I >slow the feedrate down, the problem persists. > >My test machine is a stepper machine - the change in feedrate is even more >noticeable because of the change in pitch at different motor speeds. I don't >think that this is a processor power issue, as I can reproduce it even after >deleting all but the first 6 lines of motion code (leaving the safety block). > Hi Rogge
Thanks for testing - Looks like you found it, it does appear to be some trajectory planner bug on transition from lines to curves/curves to lines. I tested the code on some mdf, I'm glad it was only a test and not an expensive piece of wood, the cutter left burn marks on some of the slowdowns :( Steve Blackmore -- ------------------------------------------------------------------------------ Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
