Some information is saved in the queue structure, but the exact path taken by a parabolic blend (as implemented in linuxcnc) depends on the initial conditions, so you wouldn't really get the same path played back in reverse unless you hit it at exactly the same speed.
Rob On Sep 9, 2015 11:21 PM, "EBo" <e...@sandien.com> wrote: > Is it possible that the motions (including blending) are cached? Then > it would be a lot easier to roll them back over the exact same > trajectory. Just a thought... > > On Sep 9 2015 12:30 PM, sam sokolik wrote: > > And to show more of robs awesomeness - Jeff said I should try > > reversing > > through a tool change.. > > > > It stops reversing once it backs up to the tool change location... > > > > sam > > > > On 9/8/2015 7:51 PM, Robert Ellenberg wrote: > >> Hi Kenneth, > >> > >> There's no fundamental limitation here, it's just a matter of how > >> big we > >> make the queue structure. It's a circular buffer, so it could be > >> 1000 > >> segments longer if we could afford the space. I just made it 100 > >> segments > >> because it seemed reasonable. For context, the stock queue is 2000 > >> segments > >> (forward only, of course). One reason to limit the size is that if I > >> ever > >> get tangent blends working in reverse, it will be more expensive to > >> optimize a lot of segments. > >> > >> Seb, l'll rebase onto master before I push it to the main repo. > >> > >> Rob > >> > >> On Tue, Sep 8, 2015 at 12:25 PM, Jon Elson <el...@pico-systems.com> > >> wrote: > >> > >>> On 09/08/2015 07:43 AM, Kenneth Lerman wrote: > >>>> Why is there a 100 step limit? If it is because that's way more > >>>> than > >>> anyone > >>>> would ever need, that's fine. > >>>> > >>>> Memory is cheap. At 1000 bytes per step, storing 10 thousand steps > >>>> is > >>> only > >>>> 10 meg. That's not much in a machine with a gigabyte or more. > >>>> > >>>> > >>> it is not "steps" as in stepper motor steps. it is move > >>> segments, which is either blocks of G-code for linear moves, > >>> or maybe interpolated segments of arcs for non-linear > >>> moves. That covers a lot more territory! > >>> > >>> Jon > >>> > >>> > >>> > >> > >> > ------------------------------------------------------------------------------ > >>> _______________________________________________ > >>> Emc-developers mailing list > >>> Emc-developers@lists.sourceforge.net > >>> https://lists.sourceforge.net/lists/listinfo/emc-developers > >>> > >> -- > >> Kenneth Lerman > >> 55 Main Street > >> Newtown, CT 06470 > >> > >> > ------------------------------------------------------------------------------ > >> _______________________________________________ > >> Emc-developers mailing list > >> Emc-developers@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-developers > >> > >> > ------------------------------------------------------------------------------ > >> Monitor Your Dynamic Infrastructure at Any Scale With Datadog! > >> Get real-time metrics from all of your servers, apps and tools > >> in one place. > >> SourceForge users - Click here to start your Free Trial of Datadog > >> now! > >> http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140 > >> _______________________________________________ > >> Emc-developers mailing list > >> Emc-developers@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-developers > >> > >> > > > > > > > > > ------------------------------------------------------------------------------ > > Monitor Your Dynamic Infrastructure at Any Scale With Datadog! > > Get real-time metrics from all of your servers, apps and tools > > in one place. > > SourceForge users - Click here to start your Free Trial of Datadog > > now! > > http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140 > > _______________________________________________ > > Emc-developers mailing list > > Emc-developers@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-developers > > > > ------------------------------------------------------------------------------ > Monitor Your Dynamic Infrastructure at Any Scale With Datadog! > Get real-time metrics from all of your servers, apps and tools > in one place. > SourceForge users - Click here to start your Free Trial of Datadog now! > http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140 > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------------ _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
