Programming and Operating Manual (Milling) 
90  6FC5398-4DP10-0BA1, 01/2014 
See the following illustration for multiple block contours using the example of the G17 plane: 
 
 
Rounding, chamfer 
Functionality 
You can insert the chamfer (CHF or CHR) or rounding (RND) elements into a contour corner. If you wish to round several 
contour corners sequentially by the same method, use "Modal rounding" (RNDM). 
You can program the feedrate for the chamfer/rounding with FRC (non-modal) or FRCM (modal). If FRC/FRCM is not 
programmed, the normal feedrate F is applied. 
CHF=...  ; Insert chamfer, value: Length of chamfer 
CHR=...  ; Insert chamfer, value: Side length of the chamfer 
RND=...  ; Insert rounding, value: Radius of chamfer