Siemens SINUMERIK 840D sl Programming Manual page 273

Examples
Example 1: Chamfering 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...
...
Fundamentals
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
9.15 Chamfer, rounding (CHF, CHR, RND, RNDM, FRC, FRCM)
• 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
feedrate for chamfering 100 mm/min.
Motion commands
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