Rounding, Chamfer - Siemens sinumerik 808d Programming And Operating Manual

1.5.2

Rounding, chamfer

Functionality
You can insert the chamfer (CHF or CHR) or rounding (RND) elements into a contour corner.
If you wish to round several contour corners sequentially by the same method, use "Modal
rounding" (RNDM).
You can program the feedrate for the chamfer/rounding with FRC (non-modal) or FRCM
(modal). If FRC/FRCM is not programmed, the normal feedrate F is applied.
Programming
CHF=...
CHR=...
RND=...
RNDM=...
FRC=...
FRCM=...
Information
The chamfer/rounding functions are executed in the current planes G17 to G19.
The appropriate instruction CHF= ... or CHR=... or RND=... or RNDM=... is written in the
block with axis movements leading to the corner.
The programmed value for chamfer and rounding is automatically reduced if the contour
length of an involved block is insufficient.
No chamfer/rounding is inserted, if
● more than three blocks in the connection are programmed that do not contain any
● or a plane change is carried out.
F, FRC,FRCM are not active when a chamfer is traversed with G0.
If the feedrate F is active for chamfer/rounding, it is by default the value from the block which
leads away from the corner. Other settings can be configured via machine data.
Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
; Insert chamfer, value: Length of chamfer
; Insert chamfer, value: Side length of the chamfer
; Insert rounding, value: Radius of chamfer
; Modal rounding:
Value >0: Radius of chamfer, modal rounding ON
This rounding is inserted in all contour corners.
Value = 0: Modal rounding OFF...
; Non-modal feedrate for chamfer/rounding
Value >0, feedrate in mm/min (G94) or mm/rev. (G95)
; Modal feedrate for chamfer/rounding:
Value >0: Feedrate in mm/min (G94) or mm/rev. (G95),
Modal feedrate for chamfer/rounding ON
Value = 0: Modal feedrate for chamfer/rounding OFF
Feedrate F applies to the chamfer/rounding.
information for traversing in the plane,
Programming principles
1.5 Special turning functions
67