hey guys sam i just looked at that link you sent that looks pretty cool
only thing is i don't know is if it will work to reduce the backlash issue i am getting. I have about 0.10mm of backlash on each axis. half of that is from the thrust bearings which is fixable with new bearings the rest is from the ball nut i think and i am not willing to fix that but i can only try it. does anyone want to have a go with making a config like they did? one axis would be best I am struggling to get my head around the different layers. i probably need to write it all out or use a diagram or something. regardless i am sure i will work it out. just might take some brain cells cheers Andrew On Fri, Jan 2, 2026 at 4:54 AM Sam Sokolik <[email protected]> wrote: > This was also John k.. I would trust his solution. He is the one that > came up with hal in linuxcnc... (Among other things). > > On Thu, Jan 1, 2026, 9:49 AM andy pugh <[email protected]> wrote: > > > On Thu, 1 Jan 2026 at 15:41, andy pugh <[email protected]> wrote: > > > > > > On Wed, 31 Dec 2025 at 22:14, andrew beck <[email protected]> > > wrote: > > > > > > > just looking for a config example if possible for a mesa card from > > someone > > > > that has this nested PID loop setup. > > > > > > This may not be as effective as you would hope. Cascaded PID loops... > > > > Actually, what was done with the MPM jigmill wasn't a cascaded PID. > > What was done there was to run a P + FF control based on the motor > > encoder and an I control based on the linear scales. > > > > Then the two controllers were summed together to create a PID > > controller, but with I using a different feedback source than P and D. > > > > -- > > atp > > "A motorcycle is a bicycle with a pandemonium attachment and is > > designed for the especial use of mechanical geniuses, daredevils and > > lunatics." > > — George Fitch, Atlanta Constitution Newspaper, 1912 > > > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
