On Wednesday 30 June 2021 06:30:30 Les Newell wrote: > On a trivkins machine I don't think it matters much. In coordinated > mode the lowest speed/acceleration for a given axis will win. In joint > mode (mainly jogging while unhomed) the joint's speed + acceleration > are used. > > If you are using soft limits it pays to have to have the axis limits > slightly before the joint limits. If you are about hit an axis limit > the axis will decelerate to a stop. If you hit a joint limit the joint > stops without any deceleration. > This is good to know Les, thank you. But for those who don't know how to achieve that, a 1 axis example would be a huge help.
In making a servo for axis A/B/C in a stepper machine, there is a huge differential in how it runs unhomed, and how it runs after homed. Being a full rotation device, it has no limits set. > Les > > On 30/06/2021 11:09, Matthew Herd wrote: > > A second question. For velocity mode operation between LinuxCNC and > > the USC board, do I need to add headroom to any speeds or > > accelerations? Right now I have the TRAJ section max speeds & > > accelerations set higher than the max speeds & accelerations on the > > joints and axes (which are set to be the same, since it’s a trivkins > > machine). Or should I be setting all max speeds and accelerations > > to the same numbers (excepting if joint 2/Z might be set lower)? > > > > Thanks! > > Matt > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users 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
