Yes indeed, as part of my tuition costs for this field I bought Gecko 320x controllers and DC servos, as a package from Keling. Never again. Practically undocumented, disappointing support from Gecko, unanswered forum questions, etc. etc. When trying to tune the PIDs for example, the test points (or rather, the best candidates for test points given the obsolete documentation) gave no signal at all. I got the same amount of signal from Gecko support.
I have a Mesa 5i25 doing step generation along with a 7i76 for I/O. I may be seeking advice on debugging (I really am a newb here) if the first two strategies (adjust servo thread frequency; try new TP) don't pan out. On Sat, Apr 12, 2014 at 3:42 PM, Gene Heskett <[email protected]> wrote: > On Saturday 12 April 2014 15:40:08 Jon Elson did opine: > > > On 04/12/2014 08:18 AM, Philipp Burch wrote: > > > Anyway, figuring out the maximum with a servo system > > > should be easier, at least if your hardware can handle the > > > maximum torque of the drives. Just set the acceleration > > > limit to some insanely large value (100'000mm/s^2 or so) > > > and then do a G0 move with one joint at a time while > > > logging the encoder feedback with halscope. You'll > > > probably need to temporarily raise your FERROR and > > > MIN_FERROR to about the magnitude of the move for this. > > > > Mr. Frey indicated he is using Gecko 320-series drives, so > > he may > > not have any way to read high encoder rates on his system. > > (If he's using hardware step generation, then he may be able > > to.) > > But, with just a simple breakout board, it could get difficult. > > Depending on model of Gecko drive, they may not fault out > > until 128 encoder counts of following error develops. > > Yikes! AIUI, the gecko's also have rather leasurely pulse timing > requirements. My 2M542's seem to be tolerant of 10x faster pulses. > > > Jon > > > Cheers, Gene > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > Genes Web page <http://geneslinuxbox.net:6309/gene> > US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS > > > ------------------------------------------------------------------------------ > Put Bad Developers to Shame > Dominate Development with Jenkins Continuous Integration > Continuously Automate Build, Test & Deployment > Start a new project now. Try Jenkins in the cloud. > http://p.sf.net/sfu/13600_Cloudbees > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Put Bad Developers to Shame Dominate Development with Jenkins Continuous Integration Continuously Automate Build, Test & Deployment Start a new project now. Try Jenkins in the cloud. http://p.sf.net/sfu/13600_Cloudbees _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
