Thanks guys - will try the increase for steptime to 2500; let it run for another 4 hours (no spindle speed; not much noise)
Dave - had thought of doing this - X and Y axes are identical steppers; have to peek at the config again and see if the limit switches need moving wires. We'll see if the steptime helps first, though. Sigh! Thanks - JohnS. On Sun, Aug 10, 2014 at 1:18 PM, Dave Caroline <dave.thearchiv...@gmail.com> wrote: > divide and conquer > eg swap driver to another axis, that eliminates the driver leaving > mechanics or the interface to the driver (timing/levels) > > mechanics, I have had couplings slip > > interfacing, bad timing delay from the reversal to the first step > driver not seeing levels correctly (opto not driven hard enough) > > Dave Caroline > > > On 10/08/2014, John Alexander Stewart <ivatt...@gmail.com> wrote: > > Hi all; > > > > I thought I had this fixed. > > > > running a 4 hour engraving process, and the X axis slowly moves. At the > > end, it is off, maybe, 0.3mm or so. (using centre drill before and after, > > you can see different points) > > > > I thought I had this fixed, because I've had this problem for a long > time, > > now I find that the error is small, but still exists. > > > > - 5i25 has stepdir, etc, parameters set to 2,000 (all 4 of them) > > > > - The G540 motor is tuned as per directions. (tuned more than once) > > > > - Only X axis affected, and only in 1 direction. > > > > - machine slowed down, currently trying one where I increased accel > > parameters to slow down any "jerking". > > > > I'm beginning to think that the G540 is not working quite right, as I've > > spent (probably, over the last year) about 1 week on fixing this X axis > > slip. > > > > What would you guys try? > > > ------------------------------------------------------------------------------ > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
