Turns out that when I actually CUT something other than air, using the loose tolerances (even 0.02) gives me unacceptable faceting. I don't need *accuracy* per se, but I do need smoothness.
I don't think I'm trying to operate at outrageous speeds - about 2500mm/min. Maybe my acceleration is set too low? Or too high? I didn't give too much thought to the acceleration limits - I didn't know how to determine it for a servo system. (On stepper systems I just increased it until I lost steps, then backed off 10% or so -- scientific, hey?) On Fri, Apr 11, 2014 at 4:48 PM, Robert Ellenberg <[email protected]> wrote: > Hi Rod, > > This is actually a good example of why G64 is a bit confusing at first. > Since you haven't specified a Q word, G64 with a P tolerance by default > uses the same tolerance for the naive cam detector. What that means is > that your command here: > > G64 P0.05 > > Is interpreted by LinuxCNC to mean this: > > G64 P0.05 Q0.05 > > I'd be willing to bet that if you used this setting instead, it would > revert to the "ugly" behavior: > > G64 P0.05 Q0.0 > > -Rob > > > > > On Fri, Apr 11, 2014 at 4:19 PM, Rod Fitzsimmons Frey <[email protected] > >wrote: > > > G0 P0.05 worked like a charm! Thanks Viesturs. I'll have to go read the > > code to understand the behaviour. > > > > > > On Fri, Apr 11, 2014 at 4:16 PM, Rod Fitzsimmons Frey <[email protected] > > >wrote: > > > > > Perhaps I'm confused about G64? From the docs: > > > > > > G64 is just blending and the naive cam detector is not enabled. G64 > and > > > G64 P0 tell the planner to sacrifice path following accuracy in order > to > > > keep the feed rate up. ... G64 P0 has the same effect as G64 alone > > > (above), which is necessary for backward compatibility for old G Code > > > programs. > > > > > > I'll try the small value for G64 instead. I'm not concerned about > > > accuracy in this application - .005" would be fine. > > > > > > I'll definitely have a look at the new trajectory planner too! > > > > > > > > > On Fri, Apr 11, 2014 at 3:28 PM, Viesturs Lācis < > > [email protected]>wrote: > > > > > >> 2014-04-11 22:15 GMT+03:00 Rod Fitzsimmons Frey <[email protected]>: > > >> > > >> > I've set G64 P0, which I think should eliminate motion mode > concerns? > > >> > > >> > > >> P0 means that max allowed deviation from defined path in order to > > maintain > > >> velocity is equal to as much as total zero, so it really eliminates > not > > >> only concerns about motion mode, but also any options to try to > maintain > > >> the velocity. Try increasing it to something like 0,02 and see, if it > is > > >> better. > > >> > > >> I would say that this particular case is a perfect guinea pig for the > > new > > >> trajectory planner :) > > >> > > >> Viesturs > > >> > > >> > > > ------------------------------------------------------------------------------ > > >> Put Bad Developers to Shame > > >> Dominate Development with Jenkins Continuous Integration > > >> Continuously Automate Build, Test & Deployment > > >> Start a new project now. Try Jenkins in the cloud. > > >> http://p.sf.net/sfu/13600_Cloudbees > > >> _______________________________________________ > > >> Emc-users mailing list > > >> [email protected] > > >> https://lists.sourceforge.net/lists/listinfo/emc-users > > >> > > > > > > > > > > > ------------------------------------------------------------------------------ > > Put Bad Developers to Shame > > Dominate Development with Jenkins Continuous Integration > > Continuously Automate Build, Test & Deployment > > Start a new project now. Try Jenkins in the cloud. > > http://p.sf.net/sfu/13600_Cloudbees > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > ------------------------------------------------------------------------------ > Put Bad Developers to Shame > Dominate Development with Jenkins Continuous Integration > Continuously Automate Build, Test & Deployment > Start a new project now. Try Jenkins in the cloud. > http://p.sf.net/sfu/13600_Cloudbees > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Put Bad Developers to Shame Dominate Development with Jenkins Continuous Integration Continuously Automate Build, Test & Deployment Start a new project now. Try Jenkins in the cloud. http://p.sf.net/sfu/13600_Cloudbees _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
