Will someone provide the G code for a convex surface with a radius of 0.65 inches in the Z plane for a length of 4 inches in the X plane? At one time I used G68 with the canned arc program in the Mach 3, but it seems I no longer figure out how to do that.
Thanks
AJ

G20 G40
G00 X0 Y0 Z1.
G01 Z0 F10.
G18
G02 X-4. Z0 R3.4019
G17
G00 Z1.
M30

Graham

Thanks Graham, I can build on what you provided.
AJA