On Thu, 2009-03-05 at 16:54 +0100, Robert von Knobloch wrote: > Hello, > > I have a 3-axis cnc router for making small items (printed circuit > boards etc.). Because it uses a high speed motor (30 000 rpm), it uses > collets to hold drills or milling tools. When drilling PCBs I must > change drill size quite often, so I have tried to use G28to move to a > known, absolute position, away from the workpiece, before doing a drill > change. > This works, except that I want to move Z first (to clear clamps etc.), > and then move to the absolute position. I do not want to issue commands > using the workpiece 'Zero' reference, but the absolute 'machine' one.
I don't know if this helps, but at the bottom of: http://www.linuxcnc.org/docview/html//config_ini_config.html#r2 there is a toolchange .ini file parameter, [EMCIO] TOOL_CHANGE_POSITION, that may be useful. I seem to recall there is a form that allows separating axis movement (ie. Z then XY). I haven't found any detailed information. ------------- Kirk http://www.wallacecompany.com/machine_shop/ ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
