On Sun, 2008-07-20 at 16:32 -0400, John Kasunich wrote: ... > I wonder if Kirk is thinking of (or already has) something like the tool > turret "encoder" on the Mazak at the CNC workshop? That machine has > five prox switches that generate a 5 bit code to indicate which tool is > selected. It is a simple absolute encoder, _except_ that the prox > switches are "looking at" a series of drilled holes in the disk that > forms the tool turret. When the turret is at an intermediate position, > between two tools, none of the holes line up, and the prox switches > report all zeros. There is an additional prox that says "you are in a > valid position". > > In any case, Kirk may be over-worrying about this. Unless somebody > kills the power in the middle of a tool-change, the machine will always > power up in a valid position. You can't ignore that possible invalid > situation, but it will by no means be a frequent problem. > > Regards, > > John Kasunich
I suspect the Mazak carousel was designed to always come to a valid position even with the power off, or at least fault out. I was planning to remove that aspect of my changer. Your right, I am being _way_ too fussy, but I didn't know that when I started thinking about it. Thanks. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC/EMC CNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending Craftsman AA 109 restoration Shizuoka ST-N/EMC CNC) ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
