Re: 3-dimensional circular interpolation question
You should be able to code two half circles with Z movement if you can define the highest and lowest points. One half circle with Z down, the other with Z up.
That said, there should be no issues with a segmented circle, assuming the machine is well setup. Reality is that even when cutting with G2, G3 moves the machine is given straight line segments. That is the only way GCode machines move. There are no arc moves. Only straight lines. The only difference is that with G2-3 moves, the controller writes the segments and not the CAM program.
Gary Campbell CNC Technology & Training
GCnC411 (at) gmail.com www.youtube.com/user/Islaww1/videos