I never ment to imply that NURBS were necessary -- I like them for other reasons (like exact representation of conics, splaying the control polygon gives you a helix in closed form (read threading in any arbitrary axis), is a natural representation produced from 3D models and CAD systems, and of course the ability to smooth and analyze them. I will take a look at the TinyG firmware for reference, and I am aware that there are a number of ways to get to achieve jerk minimization.
Thanks for the TinyG pointer BTW, EBo -- On Jul 8 2013 12:51 AM, Alexey Starikovskiy wrote: > There is an quite simple algorithm, which is used in TinyG firmware. > There > is a link to the paper from their github. No NURBS involved. > > > On Mon, Jul 8, 2013 at 1:23 AM, EBo <[email protected]> > wrote: > >> Since I do not have my references handy I thought I would review >> some >> of the properties necessary to geometrically minimize jerk. I found >> a >> couple of references online that might make for a good read: >> >> >> Smooth trajectory generation for five-axis machine tools: >> >> >> >> http://academia.edu/3862221/Smooth_trajectory_generation_for_ve-axis_machine_tools >> >> So it looks like they are requiring C3 continuity, and uses NURBS. >> This might comtinue the interesting debate... >> >> EBo -- >> >> >> >> ------------------------------------------------------------------------------ >> This SF.net email is sponsored by Windows: >> >> Build for Windows Store. >> >> http://p.sf.net/sfu/windows-dev2dev >> _______________________________________________ >> Emc-developers mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-developers >> > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Windows: > > Build for Windows Store. > > http://p.sf.net/sfu/windows-dev2dev > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
