Mark Wendt (Contractor) wrote: > > I moved my X axis to where I'd simulated my part to be, hit the Touch > Off button, and the little window popped up. I entered 0.0 with P1 > G54 selected in the pull down. Some activity - disks whirling, small > activity bar, etc, then a warning window popped up saying the machine > had to be "homed" to do that. So, I homed the machine again, moved > to the same spot where I was before, and repeated the "touch off" > with the same results. Re-homed the machine, ran the touch off from > the home position, and set in 2.0 with P1 G54 selected in the > pulldown, and it sorta worked this time. I didn't get the > warning/error message, but now when the machine is homed, it shows > the virtual cutter in the Axis display 2" down the X axis even though > the cutting head is sitting in the home position. > > Not exactly the intended results, at least for what I was thinking > the "Touch Off" function to be. The problem is that a lot of functionality in EMC2 and Axis needs to know the current position of the slides relative to the machine's limits of travel. For instance, Axis displays the machine's limits on the screen. EMC checks all programs against the machine's limits and reports and error if a program will exceed them. The leadscrew error compensation tables are based on machine position. All of this is calibrated by the homing function, and that means homing the machine to the exact same position every time. Home switches are not that hard to install.
So, using the home function to set home as a random location doesn't work. It really needs to be the same position every time, and then you can set the machine limits based on that position. Then, the touch off function will relate a workpiece-relative position to the machine position. When you then load a part program, you can see a box showing the machine's limits of travel, inside a box showing the workpiece's bounding box. Jon ------------------------------------------------------------------------------ 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-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
