Well. As you say it's not the best to use an induction AC motor for a servo work but I managed to get 0.3 or 0.4 mm of error wich is pretty cool for the job.
I tried using the pid BIAS as Andy told to decrease vibration but nothing happened. Also tried decreasing the servo thread speed as Gene said but didn't help either. I think the best here is to avoid the resonance speed as Jon told, because if I increase the rapid to 9000 mm/min (wich is a lot) I have a lot less vibration. This happens also when I decrease it to 1500 mm/min. I guess with a better tuning I can get better results but I have a lot to learn about servos, also there's the inherent limitation of the AC motor. But I don't have to forget that the charriot it's vertical and weights a lot, we even tried with a person standing over it and behaves in the same way so it will work ok with the induction transformer that has to be on it. I'm happy because it's going to work really fine for the job, most of you already know that I was automating a machine for case hardening on camshafts. And may be in the near future I can install an AC servo since this VFD can handle permanent magnet motors too. In the next few days I'll be uploading some videos to show you how it works and how is the machine. Also I would like you to see it fully working with the induction heater on it! Thanks as alway!! 2013/12/11 Kirk Wallace <kwall...@wallacecompany.com> > On 12/11/2013 09:40 AM, Dave Cole wrote: > ... snip > > Siemens had hybrid motors that were not > > standard induction motors at the time that could do better positioning > > but they were as expensive ore more expensive than other companies servo > > drive systems and were generally only used for very large HP/torque > > applications that required some level of positioning at high power > > levels. Think big $$. > > > > Dave > > Speaking of getting creative with induction motors, I found this > recently. It may be of interest. > > http://powerelectronics.com/power-management/how-run-split-phase-induction-motor-three-phase-inverter > > > -- > Kirk Wallace > http://www.wallacecompany.com/machine_shop/ > http://www.wallacecompany.com/E45/ > > > ------------------------------------------------------------------------------ > 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 > -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ 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
