I would vote mechanical also - That is how are old machine does it. It was pretty easy to setup. (I actually wrote a comp for the spindle gearbox/index for this machine). it sets the transmission into 'lock' mode then creeps into the dog. Checks to see that the spindle is at 0 rpm and then sets a 'spindle is locked' bit.
http://www.youtube.com/watch?v=KplU8hkI0AQ sam On 12/9/2010 4:20 PM, Chris Radek wrote: > On Wed, Dec 08, 2010 at 06:21:03PM -0800, Gary McRobert wrote: >> >> Still undecided as how to resolve the tool change challenge. > I think you are asking about how to do spindle orient. > > Having used machines with vfd+pid orient and machines with mechanical > orient and lock, I have to say the mechanical scheme wins, hands down. > > A full servo spindle would orient fine -- but if you don't have it, I > suggest trying hard to come up with a mechanical orient stop, and use > the "jog" feature of the vfd to get there. It should have a switch so > when it's done the vfd can know to stop jogging. > > Chris > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
