Rob Jansen <r...@...> writes: > > I'm lost. > I thought that the touch-off feature was for setting the workpiece home
snip... > After homing my machine, giving machine coordinates, how do I manually > set the home coordinates of my workpiece to 0,0,0 ? > > Currently I search the sides of my workpiece and do a G92 X -5 / G92 Y > -5 but that's not really a good and solid way to work. > > Regards, > > Rob Hi Rob, After homing your machine you will still have the previous values stored from touching off even though you may have turned your machine & emc off. I cut and pasted some info from the Emc wiki below - and you can research more at: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?CoordinateSystems In MDI: Move to the machine origin. G53 G0 X0Y0Z0 (A0B0C0) Clear the G92 coordinate offset. G92.1 Use the G54 coordinate system. G54 Set the G54 coordinate system to be identical to the machine coordinate system. G10 L2 P1 X0Y0Z0 (A0B0C0) (watch the screen (in Axis) when you do this and you'll see the work offsets move to the machine home position.) Turn off tool offsets. G49 Turn on Relative coordinate display from the menu now touch off on the workpiece using your edgefinder. Remember to add/subtract the radius of your edgefinder to your touchoff value so that the (X/Y) axis zero is position on the workpiece is equal to the spindle centerline. When you touchoff the Z, Emc will not add a tool offset unless a toolchange command is given M6 T1 G43 H1 so if you are using a toolchange and tool number (like above) then you should enter a reference tool in the tool table with an offset value of 0.0 and use that tool for touching off in Z. Now you can move where you want and G0 X0Y0Z0 will always return you to your workpiece home, and G53 X0Y0Z0 will always return you to the machine home position. Tom ------------------------------------------------------------------------------ Register Now & Save for Velocity, the Web Performance & Operations Conference from O'Reilly Media. Velocity features a full day of expert-led, hands-on workshops and two days of sessions from industry leaders in dedicated Performance & Operations tracks. Use code vel09scf and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
