If you do bidirectional compensation then backlash does not apply. I think I would adjust the scale to get the numbers to match as good as possible. Then the compensation values would be small.
On Thu, Sep 5, 2013 at 1:20 PM, andy pugh <bodge...@gmail.com> wrote: > On 5 September 2013 19:08, Russell Brown <russ...@lls.lls.com> wrote: > > > Were the 'errors' I showed (~.015mm over a 50mm move) in the right ball > > park for a non-ball-screw benchtop mill driven by steppers? > > Not brilliant, but then I doubt that the machine is driven by > super-precision screws. > > > Should I expect a commanded 50mm move to travel 0.040mm less than 50mm ? > > > > Does the variation in actual distance moved indicate missed steps? (the > > actual move varied with different microsteppings) > > You may be missing steps, it is always a possibility with stepper machines. > > I don't suppose you have any way to get the DRO feedback into the PC? > Closing the loop might be a fun project. > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > > ------------------------------------------------------------------------------ > Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! > Discover the easy way to master current and previous Microsoft technologies > and advance your career. Get an incredible 1,500+ hours of step-by-step > tutorial videos with LearnDevNow. Subscribe today and save! > http://pubads.g.doubleclick.net/gampad/clk?id=58041391&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Addressee is the intended audience. If you are not the addressee then my consent is not given for you to read this email furthermore it is my wish you would close this without saving or reading, and cease and desist from saving or opening my private correspondence. Thank you for honoring my wish. Just for you NSA - think autointercourse terrorist suitcase bomb sarin hello ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
