Siemens SINUMERIK 840D sl Programming Manual page 247

Examples
Example 1: Chamfer between two straight lines
Programming can be performed in two ways:
● Programming with CHR
Program code
...
N30 G1 Z... CHR=2 FRC=100
N40 G1 X...
...
● Programming with CHF
Program code
...
N30 G1 Z... CHF=2(cosα*2) FRC=100
N40 G1 X...
...
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
● MD20201 Bit 0 = 1 (derived from previous
block).
● G71 is active.
● The width of the chamfer in the direction of
motion (CHR) should be 2 mm and the fee‐
drate for chamfer 100 mm/min.
Fundamentals
2.9 Motion commands
247