Hello, Petr I'm not sure this will help but, do you have blending enabled(G64 Px.xxx)? That should help you keep your feedrate up while contouring.
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?TrajectoryControl /Anders petr ruzicka skrev: > Gents, > > Finally reinstalled my emc2 and retuned it and > dicovered a interesting problem that might be worth > investigating. > Before I start here are the HW specs. P4 1.8Ghz, 512Mb > ram, ac servo motors (Yaskawa SDGA model running in > torque mode )Machine maximum speed is 8400mm/min with > std acc of 450 and 650 for max. Standart f-error on > all axes is below 0.03mm at top speed. > When simple nc code is run, machine runs perfectly, > when a circle nc code (simplest ) with g3 and g2 code > is loded and executed, machine will run smoothly and > will run at full speed. When loaded 3D contouring > pattern (code is heavier ) with arcs machine will jerk > a bit but will still run say satisfactory, (reaches > 6500mm/min) when the same pattern is loaded but code > without arcs, and executed machine jerks, and > performane goes to the drain. (jerks, slow feed (max > 1500mm/min ) > When looking at the scope from the servopacks , > sequence 1 runs , accels, torque and speed lines are > smooth and clean , 2nd one has more peaks and third > one is a real mess. (will post some pics of graphs in > next post ). Since EMC2 has no lookahead and from what > I've understood that it only looks for the next move > for acc/dec param, would this be a limitation of the > whole system? Is here a workaround?, or has emc2 > reached it's performance limit? Any comments are > appreciated. > > Thank you all for your patience on the IRC chanel. > during my reinstall. Cheers > > > > ____________________________________________________________________________________ > Looking for earth-friendly autos? > Browse Top Cars by "Green Rating" at Yahoo! Autos' Green Center. > http://autos.yahoo.com/green_center/ > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier. > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers > > > ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
