Gene, that’s very odd behavior. My machine isn’t homed (still just working on basic tuning) when I’m doing my tests and your behavior sounds similar. I wonder if we could determine the reason for this difference in behavior.
> On Jun 30, 2021, at 9:25 PM, Gene Heskett <[email protected]> wrote: > > On Wednesday 30 June 2021 14:47:57 Les Newell wrote: > >> On 30/06/2021 12:52, Gene Heskett wrote: >>> 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 your INI file, there are two places where you can set the MIN_LIMIT >> and MAX_LIMIT (joint and axis). Just make sure you hit the axis limit >> before the joint limit. The difference does not need to be much.* >> * >> >>> 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. >> >> In that case you won't be using soft limits, so it makes no >> difference. > > I agree. But thats not how it seems to work. I won't say its unusable > when unhomed, but its 10% of its homed speed of it is jogged whle > unhomed and it suffers from windup badly even running that slow. It acts > like it afraid to move if not homed. The rest of the stepper motor > driven stuff works well, homed or not. And it, "A" does more reversals > while homing, some times visibly away from the switch, with no false > switch stuff detected. Once homed it behaves itself exactly, stopping > within an arc-second of where I sent it, as long as it can get stopped > w/o any overshoot. Thats dangerous because the pwmgen, if coasting too > far, will try to reverse it while its still turning and that crowbars > and shuts down its 24 volt 10 amp supply for about a 2 minute cooldown > before a power cycle by the f2 key restores it. So I'm forced to use > much slower (10% or less) speeds while homing it, than it can run during > normal, homed operation. > >> Les >> >> >> _______________________________________________ >> Emc-users mailing list >> [email protected] <mailto:[email protected]> >> https://lists.sourceforge.net/lists/listinfo/emc-users >> <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 > <http://geneslinuxbox.net:6309/gene>> > > > _______________________________________________ > Emc-users mailing list > [email protected] <mailto:[email protected]> > https://lists.sourceforge.net/lists/listinfo/emc-users > <https://lists.sourceforge.net/lists/listinfo/emc-users> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
