Having such a large FERROR is bogus imo. Basicly you're telling the machine it can deviate 100 units from path, and you don't mind...
It's probably less bad in mm, but still worlds away from a precise part. Regards, Alex > Rob, > > Have you tried adjusting FError and Min_FError? You can increase FError > by > quite a bit, say 100 or higher if necessary. In my case that got rid of > most > of the following errors. The one instance I would still get them is in a > sequence of G0 moves, such as retract, move, plunge (I am using a laser, > so > I can get away with it <g>). Between the move and the plunge, I would > occasionally get following errors. If you get these, then increase > Min_FError until they go away. > > Regards, > Eric > > > > the past week(s) I have been working on getting my hostmot2 system > running > with the Mesa 5i20 card and stepper motors. > Up to a certain point this is a success. But there still is this problem > with joint following errors - whatever I try I keep having joint following > errors. > > I tried different values for all kinds of parameters but things only seem > to > work reliable when I put in extreme high numbers for the MAX_ACCEL values > (1000 instead of the wanted 100). Then I do not see any joint following > errors but the abrupt start/stop of the machine is not good for the > mechanics... > > The parport configuration on the same machine runs perfectly well with > MAX_VELOCITY=25 and MAX_ACCELERATION=100 (mm/s) but the hostmo2 > configuration keeps having problems. > I tried lots of different timing where BASE_PERIOD,SERVO_PERIOD and > TRAJ_PERIOD are small, larger, different values or the same but nothing > seems to help. > > I am getting kind of desperate. With the 5i20 hostmot2 configuration > things > only are working as long as I keep my jog under ~400 mm/min as soon as I > go > higher (and up to the max 1500 mm/min) the joint following error appears > on > any of the axis as soon as I jog by repeated presses of the keyboard jogs > quickly after each other. > > What causes this joint following error and how to fix it? > > > > ------------------------------------------------------------------------------ > Stay on top of everything new and different, both inside and > around Java (TM) technology - register by April 22, and save > $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. > 300 plus technical and hands-on sessions. Register today. > Use priority code J9JMT32. http://p.sf.net/sfu/p > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.287 / Virus Database: 270.12.2/2074 - Release Date: 04/22/09 08:49:00 ------------------------------------------------------------------------------ Stay on top of everything new and different, both inside and around Java (TM) technology - register by April 22, and save $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. 300 plus technical and hands-on sessions. Register today. Use priority code J9JMT32. http://p.sf.net/sfu/p _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
