That's unfortunately an issue with parabolic blends, so my fixes wouldn't help there. I wouldn't hold back though, anything you can do to break it is a good thing!
On Thu, Nov 21, 2013 at 10:00 PM, sam sokolik <[email protected]>wrote: > does this work arc-arc also - or should I stay away from those > programs? (or did that get fixed with teh split-cycle method?) > > can't wait to bang on it > > thanks > sam > On 11/21/2013 04:19 PM, Robert Ellenberg wrote: > > On Nov 19, 2013 12:18 PM, "sam sokolik" <[email protected]> wrote: > >> Heh - Ok. I have been playing with it and the motion is a lot > >> smoother. The velocity on the spiral is a strait line (used to be > >> scaloped..) > >> > >> Couple more little issues.. :) > >> On the spiral - if you pause it - then single block it. (try it - I > >> dare you) ;) - it will take off in some random direction - or do a > >> circle over and over. (kinda looks like the maybe the last blend move > >> gets extended... ) Then when you take it out of single block - you get > >> a large step change in acelleration/velocity as it goes to where it > >> supposed to be instantly and continues on. > > This should be fixed in the latest push. > > > >> I don't know how the feedrate override should act. I had mentioned that > >> it didn't violate the constraints when I want to 120% - (its speed went > >> up also 290ipm vs 350ipm. But then I thought - ok - so then I should be > >> able to set the FO max to 100% in the ini and get 350ipm... but It > >> doesn't - I still get 290ipm. (I was thinking it calculated worse case > >> for the FO) So there must be some headroom in there. > >> > >> Ok - thinking out loud... I just set the FO in the ini to 200%. I was > >> thinking I would break it being able to go over - but you have some sort > >> of checking in there (more like the original planner) where it seems to > >> stop at 350ipm and doesn't go over acceleration constraints. That is > >> cool. Maybe you have 120% hard coded? huh? Do you? ;) > >> > >> Well - one more thing - setting the feed rate override to 200% cause the > >> program not to end like before. (the motion ends but axis still thinks > >> it is running the program - the play button is pushed.) ie.. > >> http://imagebin.org/277887 Notice though - the constraints are > >> obeyed... Yay > > Yeah, feed override needs more work. The current version should at a > > minimum not fail under feed override, but it doesn't give optimal > behavior > > either. If we can get to the point of there being no acceleration > > violations under any circumstances, the next step is to improve the > > override. I just don't want to build additional stuff on top of a buggy > > base, then have to debug both at the same time. > > > > The good news is, I found a way to eliminate overshoot of trajectory > > segments. Previous versions had a bunch of band-aid fixes to prevent > > overshoot from causing too much damage, but made if very difficult to > > control acceleration during tangent "joints". The new "split-cycle" > method > > uses the exact time that a segment ends, and updates the next one with > the > > difference. > > > > If you have some time, could you give it a quick sanity check? I don't > need > > exhaustive testing for another few days, but a quick check to see if you > > can break it would be very helpful. Stepping, crazy feed overrides, > spindle > > start/stop, coolant, whatever you can think of to trip it up is fair > game. > > My goal is to get this on hardware ASAP. > > > > Thanks! > > > > Rob > > > ------------------------------------------------------------------------------ > > Shape the Mobile Experience: Free Subscription > > Software experts and developers: Be at the forefront of tech innovation. > > Intel(R) Software Adrenaline delivers strategic insight and game-changing > > conversations that shape the rapidly evolving mobile landscape. 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