Minor nit: " The E. Hemingway phrase TANSTAAFL: should be "The Robert Heinlein phrase TANSTAAFL".
On Sun, Apr 19, 2015 at 2:09 PM, Gene Heskett <ghesk...@wdtv.com> wrote: > On Sunday 19 April 2015 14:40:06 Karlsson & Wang wrote: > > Oh i didn't think about stepper. The equations are useful for DC, > > BLDC, PMSM, Asyncronous and probably also for switched reluctance. > > NP Nicklas, I just want to emphasize that we were looking at different > pages and user experiences. I believe the 47/28 increase in MAX_VEL is > entirely sensible however. But since the motor current will not change > by much if any, the increase in MAX_ACCEL wouldn't be as great. > > With steppers, MAX_ACCEL and MAX_VEL are effectively the playground > teeter-totter, where raising one, needs to be accomnpanied by a decrease > in the other. Violation=stalled motor. The E. Hemingway phrase > TANSTAAFL comes handily to mind. ;-) > > These motors also have relatively heavy dampers, which would tend to > impinge on the MAX_ACCEL settings also. But, putting them on effectively > doubled the MAX_VEL I could use by damping the resonances at 1/8 stepper > divides. > > This also is something that needs further reseach with a view of running > the motor at the ideal current that fits the drivers idea of interphase > mapping. I would love to see a driver where the current could be > adjusted live, obviously for the least noise when moving at a good > singing rate. But these 2M542's only read the dip switches for those > settings at power up. > > [biiiiig snip] > > Cheers, Gene Heskett > -- > "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> > > > ------------------------------------------------------------------------------ > BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT > Develop your own process in accordance with the BPMN 2 standard > Learn Process modeling best practices with Bonita BPM through live > exercises > http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- > event?utm_ > source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
