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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
