Chamfer, Rounding (Chf, Chr, Rnd, Rndm, Frc, Frcm) - Siemens SINUMERIK 840Di sl Programming Manual

4.22

Chamfer, rounding (CHF, CHR, RND, RNDM, FRC, FRCM)

Function
You can insert the following elements at a contour corner:
• Chamfer or
• Rounding
If you wish to round several contour corners sequentially by the same method, use
command RNDM "Modal rounding". This address is for inserting a rounding between linear
and circle contours after each traversing block. This is, for example, for deburring sharp
workpiece edges.
You can program the feedrate for the chamfer/rounding with FRC (non-modal) or FRCM
(modal).
If FRC/FRCM is not programmed, then the normal path feedrate F is applicable.
Programming
CHF=...
Or
CHR=...
Or
RND=...
Or
RNDM=...
Or
FRC=...
Or
FRCM=...
Parameters
CHF=...
CHR=...
RND=...
RNDM=...
FRC=...
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
4.22 Chamfer, rounding (CHF, CHR, RND, RNDM, FRC, FRCM)
Chamfer the contour corner
Value = Length of the chamfer (unit of measurement according to G70/G71)
Chamfer the contour corner
Programming the chamfer in the original direction of movement.
Value = width of chamfer in direction of motion (unit of measurement as
above)
Round the contour corner
Value = Radius of the rounding (unit of measurement according to G70/G71)
Modal rounding: Rounding several consecutive contour corners in the same
way.
Value = Radius of the roundings (unit of measurement according to
G70/G71)
Rounding is deactivated with RNDM=0.
Non-modal feedrate for chamfer/rounding
Value = feedrate in mm/min (G94) or mm/rev (G95); FRC > 0
Motion commands
193