On Friday 08 November 2019 07:13:02 andy pugh wrote: > On Fri, 8 Nov 2019 at 05:53, Thomas D. Dean <[email protected]> wrote: > > The config file has a strange entry: > > AXES = 3 > > COORDINATES = X Z > > > > Should there be names for 3 axes? > > Not with a lathe. This apparent oddity is no longer required in 2.8. > > > -0.0100 -0.0080 moved -0.0081 > > -0.0100 -0.0175 moved -0.0095 > > -0.0100 -0.0275 moved -0.0100 > > -0.0100 -0.0375 moved -0.0100 > > +0.0100 -0.0305 moved +0.0070 > > +0.0100 -0.0210 moved +0.0095 > > +0.0100 -0.0110 moved +0.0100 > > +0.0100 +0.0010 moved +0.0100 > > How many steps per inch is the machine set up for? The inconsistent > physical steps might be due to the step granularity.
I've not measured it but it seems to that microstepping maps ought to be calibrated to the individual motors performance so as to achieve a good match at one certain amperage, and that there will a miss-match if the motor is not being operated at that current. Since thats a variable we aren't told about, changing wildly with both the motor and driver, I feel it isn't something any of us will ever be able to precisely define. IMO, the proper current should be that which operates the motor the smoothest/quietest. But I've not experimented all that extensively to find the velocity noise null vs current. I have played with dampers, the old hf mill getting a tripling of its maximum speed with the addition of the dampers. That was my first and only machine using sw steppers. And a sample on one generally isn't a very good sample. 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
