On Nov 3, 2011, at 12:31 PM, andy pugh wrote: > On 3 November 2011 16:14, Jon Elson <el...@pico-systems.com> wrote: > >> 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. > > Now you mention it...Yes. > > I was imagining that switches (or the dead-stop that Tom has been > experimenting with) would do the squaring. Though then I don't know > why you would bother with the index.
We have the squaring part working. We send a simultaneous signal to each Granite drive and it homes to a hard stop and comes off a fixed amount. It is repeatable to no worse than 0.002, often better (lte 0.001). Then we want to have EMC home just to the index on just one of the two joints (don't really care which one) but it must also do it while coordinating the opposite joint. The reason is that then that index location would have even better repeatability. -Tom ------------------------------------------------------------------------------ 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
