I could see a small circuit on the slave side that automatically drove the stepper on that side until it was aligned with the laser. but only operates right before the homing sequence starts - so the first step is align the slave side, once it's aligned relinquish control of step/dir back to EMC and then start homing as normal.
the circuit would have 3 laser sensors attached to ADC's on a microcontroller and would drive until the center sensor registered the highest reading and the outer two approximately matched. DougM On Thu, Nov 3, 2011 at 9:36 AM, Kirk Wallace <kwall...@wallacecompany.com> wrote: > On Thu, 2011-11-03 at 10:14 -0600, Jon Elson wrote: >> On 11/03/2011 6:48 AM, andy pugh wrote: >> > >> > Is it possible to wire such that the index of only one encoder goes >> > to the encoder counters of both axes? >> > >> > >> This allws the machine to home with a varying amount of racking of the >> gantry >> each time it is homed. This seems like a really poor choice. >> >> Jon > > I wonder if one end of the gantry could have an independent comp that > just keeps alignment with the master side. The alignment could be by > reading were a laser hits a target, or a webcam/telescope reading a > target from the other side. This would need to be enclosed in a tube > spanning the two sides and linked with e-stop. EMC2 would just control > the master side. > > -- > Kirk Wallace > http://www.wallacecompany.com/machine_shop/ > http://www.wallacecompany.com/E45/index.html > California, USA > > > ------------------------------------------------------------------------------ > RSA(R) Conference 2012 > Save $700 by Nov 18 > Register now > http://p.sf.net/sfu/rsa-sfdev2dev1 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
