Siemens SINUMERIK 840Di sl Programming Manual page 196

Motion commands
4.22 Chamfer, rounding (CHF, CHR, RND, RNDM, FRC, FRCM)
Example of modal rounding, RNDM
Deburring sharp workpiece edges:
N30 G1 X... Z... F... RNDM=2 ;modal rounding 2 mm
N40...
N120 RNDM=0 ;deactivate modal rounding
Example of chamfer CHF, rounding FRCM of the following block
MD CHFRND_MODE_MASK Bit0 = 0: Accept technology from following block (default)
N10 G0 X0 Y0 G17 F100 G94
N20 G1 X10 CHF=2
N30 Y10 CHF=4
N40 X20 CHF=3 FRC=200
N50 RNDM=2 FRCM=50
N60 Y20
N70 X30
N80 Y30 CHF=3 FRC=100
N90 X40
N100 Y40 FRCM=0
N110 S1000 M3
N120 X50 G95 F3 FRC=1
...
M02
Example of chamfer CHF, rounding FRCM of the previous block
MD CHFRND_MODE_MASK Bit0 = 1: Accept technology from preceding block
(recommended)
N10 G0 X0 Y0 G17 F100 G94
N20 G1 X10 CHF=2
N30 Y10 CHF=4 FRC=120
N40 X20 CHF=3 FRC=200
N50 RNDM=2 FRCM=50
N60 Y20
N70 X30
N80 Y30 CHF=3 FRC=100
N90 X40
N100 Y40 FRCM=0
N110 S1000 M3
N120 X50 CHF=4 G95 F3 FRC=1
196
;Chamfer N20-N30 with F=100 mm/min
;Chamfer N30-N40 with FRC=200 mm/min
;Chamfer N40-N60 with FRCM=50 mm/min
;Modal rounding N60-N70
;with FRCM=50 mm/min
;Modal rounding N70-N80
;with FRCM=50 mm/min
;Chamfer N80-N90 with FRC=50 mm/min (modal)
;Modal rounding N90-N100
;with F=100 mm/min (deselect FRCM)
;Modal rounding N100-N120
;with G95 FRC=1 mm/rev
;Chamfer N20-N30 with F=100 mm/min
;Chamfer N30-N40 with FRC=120 mm/min
;Chamfer N40-N60 with FRCM=200 mm/min
;Modal rounding N60-N70
;with FRCM=50 mm/min
;Modal rounding N70-N80
;with FRCM=50 mm/min
;Chamfer N80-N90 with FRC=100 mm/min
(modal)
;Modal rounding N90-N100
;with FRCM=50 mm/min
;Modal rounding N100-N120
;at F=100 mm/min
;Chamfer N120-N130 with G95 FRC=1 mm/rev
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals