On Tue, 20 Apr 2010, Alexey Starikovskiy wrote: > Date: Tue, 20 Apr 2010 13:46:41 +0400 > From: Alexey Starikovskiy <aysta...@gmail.com> > Reply-To: EMC developers <emc-developers@lists.sourceforge.net> > To: emc-developers@lists.sourceforge.net > Subject: Re: [Emc-developers] Coordinated Gantry Homing by Linked Joints > > Isn't the separate homing of linked joints needed to remove any >misalignment in them? If you just want to do same speed and same >acceleration to them, >you might just connect control wires to both motors from single >axis/joint and have one home switch. > >So, if you need to correct misalignment, you need at some point to move >them independent of each other, >so the speeds and accelerations will differ. > >Sorry if I'm restating obvious things... >Alex.
Dont know a thing about gantrys but maybe one approach is to separate the synchronization from homing, and do a synchronize operation first, then do homing. For example a servo system with indexes on its encoder could always synchronize within one leadscrew turn (and a servo with resolver or other absolute encoder could sync with a minimal motion at startup), and then homing is (almost) standard, with even one home switch being sufficient. Peter Wallace ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
