Siemens SINUMERIK 828D Programming Manual page 286

Motion commands
9.15 Chamfer, rounding (CHF, CHR, RND, RNDM, FRC, FRCM)
Example 3: Rounding between straight line and circle
The RND function can be used to insert a circle contour element with tangential connection
between the linear and circle contours in any combination.
Program code
...
N30 G1 Z... RND=2 FRC=50
N40 G3 X... Z... I... K...
...
Example 4: Modal rounding to deburr sharp workpiece edges
Program code
...
N30 G1 X... Z... RNDM=2 FRCM=50
N40...
N120 RNDM=0
...
286
• MD20201 Bit 0 = 1 (derived from
previous block)
• G71 is active.
• The radius of the rounding should be
2 mm and the feedrate for rounding
50 mm/min.
Comment
; Activate modal rounding.
Radius of rounding: 2 mm
Feedrate for rounding: 50 mm/min
; Deactivate modal rounding.
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
Fundamentals