This is a copy of a post i made in the HSM post processor forum, but i figured the issue might benefit from some inputs here as well:
We want to generate the xy-coordinates to position our head/head machine above the part, prior to g68.2 to avoid any diagonal rapid moves through a part. Our local post expert, says most Fanuc-controlled machines does this using an internal parameter, but our machine supplier claims never to have come across it, and that their CAM/post suppliers calculates these xy-coordinates through matrix-transformation.
I could show the resultant NC-file, but my gues is it wont look any different, since the variable, as mentioned, is internal to Fanuc.
We have managed to call the initial position from the current section to generate xy-values prior to g68.2, but if the local workplane has different xy-orientation relativ to the "global" WCS, the machines rapids in the opposite direction. We want the post to create the correct code for rapid moves regardless of "incorrect" workplane xy-orientation.
I see three options:
1. Matrix-transformation of the initial position, to match the global WCS
2. Getting the fanuc-variable set up correctly if possible
3. Entirely avoid using G68.2 if possible, and let all 3+2 operations be 5-axis
Any inputs will be most appreciated
