On Wed, 27 Nov 2013 21:14:58 -0500, Gene Heskett <[email protected]> wrote: > > So, the next question is, what file do I put that offset pair into, and > what buttons do I click to tell LinuxCNC to reference those offsets when
> setting up to "etch" the top of a board? > Hello Gene, You need to set the offset in the tool table, tool #99. I have used the following procedure : - drill a very small hole with a V-carve tool in your spindle, 0.1mm depth - set X/Y zero on the DRO (this is the reference hole position) - now, move your table to center the camera on the hole - store the DRO X/Y reading in the tool #99 - reload the tool table - move back to X=0 Y=0 (so your spindle is now back on the hole) - now, if you check the G43H99 checkbox, the table should move and the camera should be perfectly centered on the hole and you still read X=0 Y=0 on the DRO - uncheck G43H99, now the spindle should move were the camera was pointing, and should should read again X=0 Y=0 Now, your setup is ok. The procedure to set the zero for a new workpiece is: - check G43H99 - move your table to point your camera to the needed zero - set DRO to 0/0 - uncheck G433H99 - the spindle should now be at the needed zero position Be careful with the nc file associated to G43H99: it does not move the spindle up, so you may experience collision if it is to low. I have modified the nc file to move up to top position before any X/Y motion. > Do also need to drill a 2nd hole and similarly record its location, but > against the first set of data so as to facilitate the auto correction of > any rotation of the workpiece about the Z axis? > There is a Z rotation compensation feature in LinuxCNC, but I do not know how to use it. On my side I use the camera to align the workpiece along X axis: I point my camera on a corner of the stock, then move along X and check if the camera center follows the edge. Then adjust the stock if I see deviation, and recheck. The workpiece is aligned in 2 or 3 iterations. Frederic. ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
