G68 Rotation problem on Fanuc 180i

[btdmfg]

I am trying to use a G68 rotational coordinate system on a VM5 OKK mill with a Fanuc 180i control. I am storing the angle in variable #550, and calling it with a "G68X0.0Y0.0R#550" line. It works great when using offset G54, but when I try to use any other offset (G55, G56, etc.) it wants to refer back to offset G54. I have tried moving the placement of the line all over in the code (before and after the offset callout), and nothing seems to fix it. Is this a parameter issue, or what have I got going on? And help would be greatly appreciated!!

[stevo1]

Maybe try to specify the G55 before and after the G68 line. I would not think that this is a parameter issue but I could be wrong. My first guess on why the G54 works ok is becasue this is usually your default work coordinate. I would probably look at were you are making G55 modal and were G68 is going modal. I am pretty sure that I have used G68 with different work coordinates before and never had any problems. It was a long time ago but I will see if I can track down one of my programs and take a look at the sequence of code to see how I put it.

Stevo

[ikneb]

Try this turn it off before you got to the next offset
G54.....
G68.....
G69.....
G55.....
G68.....
G69.....
The control is probably storing the point of rotaition