On 6 January 2014 03:54, Andy <a...@evanspt.com> wrote: > however I've been wondering how I could tie the feed rate to the motor > load. I'll try to get my head around this as I move forward on my project.
If you can find a way to get motor current data from the spindle drive into HAL then LinuxCNC has adaptive feed capability built-in. The difficulty here is that there isn't a huge range of analogue-input hardware for LinuxCNC. What are you using to generate the step pulses? > http://www.automationtechnologiesinc.com/wp-content/uploads/downloads/2012/06/KL-8082H.pdf That says 10uS step length and 200kHz. Which doesn't add up really. (200 kHz is 5uS combined step + dir) direction setup is quoted as 5uS, though if it was my machine I think I would be tempted to configure it in CC/CCW mode rather than step/dir. > These drivers are supposed handle the encoder feedback and do any > necessary travel corrections. As I understand, LinuxCNC has the > capability to use the encoders, so maybe I would be better off with > Geckos and wiring the encoders back to EMC2? LinuxCNC can handle the encoders, but only at quite low count rates unless you add extra hardware. Parallel-port counting tops out at about 20kHz, which with a high-count encoder can be rather a low motor speed. You can view the drive/motor combination as a conventional stepper drive, except one that can detect stalls and that will never (mechanically) miss a step rather than a servo system. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
