rob - I am seeing something odd with the realtime builds. Could there be a difference? I cannot get the sim on the laptop to act the same. If x and y velocitys are set to 2.33ips - and z is set to .833 - there is a section of steve.ngc (about 1/3 of the way in) that runs slower - like 120ipm. (sorry - I did not have halscope setup) when I set Z to 2.33 - the slow down goes away.
Sim runs the same config with no slow down.. thank sam On 03/17/2014 12:51 PM, Robert Ellenberg wrote: >> I think one can argue both ways John. Basically I just wanted to throw it >> out there and see if it sticks. :) >> >> You are of coarse correct because I can still set the F to what my machine >> can do, and running smoother is always going to be faster. Those little >> near stops of millisecond duration when turning a corner have been known to >> make the 24" steel kitchen base cabinet mine is sitting on dance a bit. > > Gene, to clarify a bit, the only reason we're seeing those velocity humps > is because we're pushing the path as fast as it will go. Since the > requested feed rate is far above what the machine config can actually do, > the feed that the trajectory planner produces is limited by the maximum > velocities of each segment. The trajectory planner will never exceed your > requested feed rate (other than by feed override), so you won't see those > humps at a reasonable feed rate. > > You might benefit from the "ramp frequency" setting in the new TP. I talked > about this in the forum > post<http://www.linuxcnc.org/index.php/english/forum/10-advanced-configuration/27368-new-trajectory-planner-testersprograms-wanted?start=130#44474>, > but basically, it reduces jerks by using constant acceleration during short > segments. If you set the frequency lower, it will smooth more aggressively. > ------------------------------------------------------------------------------ > Learn Graph Databases - Download FREE O'Reilly Book > "Graph Databases" is the definitive new guide to graph databases and their > applications. Written by three acclaimed leaders in the field, > this first edition is now available. Download your free book today! > http://p.sf.net/sfu/13534_NeoTech > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
