OK this seems to be better - I would see what will happen when real cutting will take place - or how will plasma be resilient to still existing cut velocity fluctuation. https://youtu.be/JdvwQDqcVmw regards,
On Thu, Aug 25, 2016 at 11:31 AM, Klemen Živkovič <[email protected] > wrote: > Thank you very much for pointers to documentation... I read it and try > added blending with: > G64 P1 > However that didn't help (although velocity profiles might actually changed > in a way there is no sharp edges). > > Further down in documentation in > sectionhttp://linuxcnc.org/docs/2.7/html/user/user-concepts.html > more precisely: "1.3. Programming the Planner" > it seems I could get benefit from "Naive Cam Detector", but it mentiones > only xyz, without rotational axe A(and B), > however i do not know with what gcode to enable "Naive Cam Detector"? > > Then I moved away from using inverse time mode and use G94, and then by > changing allowed acceleration on axes in my ini file - now it seems I get > speed of aprox. 10mm/s also when pipe rotates. > However - I still couldn't explain why I get this zigzag in velocity > profile (attached picture constantSpeed.png). > > This velocity profile should be ofcourse as flat as possible. > > It is interesting that this zigzag is only at start of the 90degree rotation > so > maybe, I need to rotate pipe before cutting of fillet actually starts - > this could reduce needed step in rotation velocity... Need to try and see.. > > > regards > > > On Tue, Aug 23, 2016 at 12:24 AM, andy pugh <[email protected]> wrote: > >> On 22 August 2016 at 22:56, Klemen Živkovič <[email protected]> >> wrote: >> >> > OK, I made correction as Andrew proposes, but this transition from >> straight >> > line to edge cutting results in velocity ripple (seen in halscope on >> video >> > below) - is it possible to have more smooth transition? >> >> That depends on the physical constraints that you have put on the >> system. Specifically the acceleration and velocity limits, and also >> how tightly you have requested that the system follows the programmed >> path. >> >> http://linuxcnc.org/docs/2.7/html/user/user-concepts.html >> http://linuxcnc.org/docs/2.7/html/gcode/g-code.html#gcode:g61-g61.1 >> >> -- >> atp >> "A motorcycle is a bicycle with a pandemonium attachment and is >> designed for the especial use of mechanical geniuses, daredevils and >> lunatics." >> — George Fitch, Atlanta Constitution Newspaper, 1916 >> >> ------------------------------------------------------------ >> ------------------ >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
