On Thursday 15 October 2020 14:01:09 Chris Albertson wrote: > Not really newer, just different specs. The "2" version goes up to > only 16 volt and is used for automotive motors powered from 12 lead > acid batteries. The "3" has a higher voltage rating. I think some > other slight differences too. > > What you are really doing here is building a DIY servo motor. An > H-bridge and PWM are used to drive a quadrature encoder to the desired > position and rate. The nest question is "Where to attach the > encoder?" Placing it on the motor shaft gives best regulation and > control of speed but placing it on the faceplate removes all the > backlash
This motor is itself a worm drive, with surprisingly low backlash, so any backlash considerations will be in the crappy Chinese machining of the BS-1 clone. Having had it apart already to clean the manufacturing swarf out of it, I was rather disappointed to see the worm and bull gear appeared to be stock off the shelf items, with no attempt to fit one to the other. So the backlash runs from dragging to nearly 1.5 degrees depending on the angle, just from that. At the price and heft, 90+ kg by the time I mount this motor on it, I expected better than that. Running it dragging might wear it in better. The question then becomes "are you breaking it in" or are you wearing it out :-( > On Thu, Oct 15, 2020 at 10:43 AM Thaddeus Waldner <thadw...@gmail.com> > > wrote: > > I see that some of these use the > > VNH2SP30 and some use the > > VNH3SP30. 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
