I would love to see the setup you did, if you have a drawing handy. (Don't make one on my account though. :)
On Sat, Apr 12, 2014 at 8:28 PM, Jon Elson <[email protected]> wrote: > On 04/12/2014 03:30 PM, Rod Fitzsimmons Frey wrote: > > 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. > Gecko is VERY good with steppers, but I think their step servo > is kind of the unwanted step-daughter. > > 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. > > > OK, in that case, I think you CAN wire the encoders back to the > mesa board so you can plot the servo response with Halscope. > I made a board for this, it makes an opto-isolated copy of the > encoder signal for the Gecko drive, and powers the encoder > from our stepper controller board and then feeds the original > signal to the stepper controller. This is a bit different > than the > Mesa system, where LinuxCNC is within the step generation > loop, so making the switch between "open-loop" step generation > and closed loop with an encoder is quite easy. I think you > can do > this with Mesa as well. By putting the positioning loop into > LinuxCNC, it is possible to get much better control of the > servo, programmable following error limits, etc. > > Jon > > > ------------------------------------------------------------------------------ > 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
