- Jul 12, 2006
- Tempe, AZ
The Fanuc and Haas uses R and C for rounding and chamfering respectively on both, mills and lathes.
Some Fanucs would use 'C' for chamfer and some had to use 'K' for chamfer. I have no idea why the change, but this is Fanuc after all.
IIRC, the intended chamfer direction was also determined by designating a positive or negative value with the C or K. This is similar as you need to specify a positive or negative I or J value for G2 or G3 moves.
Lathe program turning a 2" step on a shaft with .1" chamfer on the nose:
G0 X1. Z0.1
G1 Z0 F.005