As you sad : "Yes, as I said, motor is "drifting" in particular direction, which may change (not always), if system is restarted, but the direction of drift does not change, once the system is running - if it gradually goes up, then it does so; if down, then it keeps getting deeper."
Means that the "drift" in is both directions. But the axis (motor) is always making more space than expected , isn't it ? Alex On Thu, Sep 4, 2014 at 5:29 PM, alex chiosso <achio...@gmail.com> wrote: > As Gene is suggesting , here > <http://linuxcnc.org/index.php/english/forum/16-stepconf-wizard/27293-solved-tuning-stepper-motor-with-gecko-201-driver?start=10> > is a discussion on the forum regarding problems with "steps" and Gecko > Drive . > A question for you ... the router is brand new (I mean that you have > finished the setup) or is a "already working" machine ? > This question is to understand if the machine was working fine before and > later start with the problem you are mentioning. > > Alex > > > On Thu, Sep 4, 2014 at 5:21 PM, Gene Heskett <ghesk...@wdtv.com> wrote: > >> On Thursday 04 September 2014 11:07:07 Viesturs Lācis did opine >> And Gene did reply: >> > Hello! >> > >> > I have a strange situation: >> > Stepper motor of Z axis on a cnc router is losing it's position - >> > doing a series of numerous holes in material will end up with various >> > depths of holes. >> > >> > The strange part is: >> > 1) for each time, when machine is running, it will lose position only >> > in one direction; if holes are getting deeper, then they only get >> > deeper, not the other way; >> > 2) the direction of "drift" will change randomly as machine is >> > restarted and only then; simply running another g-code file will not >> > change the direction of "drift"; >> > >> > There is Nema23 stepper motor and Gecko stepper driver. >> > Motor cable is checked for loose contact, step/dir signal lines are >> > checked for loose contact, ballscrew and linear rails are checked for >> > any damage to cause extra resistance in particular direction, the >> > clutch between motor and ballscrew is checked not to slip. >> > >> > I am totally out of ideas, where to look. Has anyone ever experienced >> > anything like that? What puzzles me most is the consistency to >> > maintain direction of "drift" and yet randomly change, when whole >> > system is restarted, so any suggestions will be appreciated. >> > >> > Viesturs >> >> Can we assume you have lengthened the dirsetup and dirhold settings? >> >> I don't have any gecko's, but this sure seems to be an ongoing problem >> with them. >> >> From previous messages, it seems a trip to gecko for repairs fixes it, but >> a random direction fixed at machine boot? Thats weird, and I've no clue. >> >> 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) >> Genes Web page <http://geneslinuxbox.net:6309/gene> >> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS >> >> >> ------------------------------------------------------------------------------ >> Slashdot TV. >> Video for Nerds. Stuff that matters. >> http://tv.slashdot.org/ >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > ------------------------------------------------------------------------------ Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
