Chris Morley wrote: > > So you wouldn't need to turn jerk limiting off for G33.1 then. > Just as we don't turn acceleration or speed limiting off for G33.1 > > Perhaps. What you have to be really careful with is anything that could cause delay in the trajectory following the spindle. We had a problem with this in the early EMC2 where the TP was running at 1/10th the rate of the servo thread, and that introduced a delay in following the spindle. making the TP run at the servo thread fixed this problem. But, yes, a proper jerk limit should not cause any delay as long as the jerk limit is not reached. > The TP should never ask the machine to move faster then it can. > Yes, of course. > Well gradual is a relative term :) > It may have been a very fast move of a small circle on a large machine. > Also I don't remember the amount of the spike. it certainly wasn't thousands > of an inch. > This was an company trying to sell something so would give worse case. > I'm pretty sure it was hiedenhain. > I wish I could find the write up. > OK, certainly you can cause excessive following error on any arc move if you make it small enough and request a fast enough feedrate.
Jon ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
