Siemens Sinumerik 840D Operating Turning page 106

Section 4
Notes
B507
B507
Chamfering of contour corners
The defined rounding of the contour corners between linear and circular
contours in any combination can be carried out very comfortably.
Only the points of intersection of the contour elements have to be pro-
grammed. The control unit automatically adds the required circular arc
contour element.
P3
Rounding with statement of the rounding radius
Programming example:
.....
N40 G42 G00 X0 Z2
N50 G01 Z0
N60 X40 RND=10
N70 Z-40 RND=40
N80 X80 Z-80
If on a work piece there are several edges one after the other on each of
which the same rounding radius is to be machined (e. g. for deburring),
modal rounding may be used.
This instruction must be deactivated afterwards.
Modal rounding ON EIN
Modal rounding OFF
Programming example:
N50 G01 Z0
N60 X40 RNDM=0.5
N70 Z-10
N80 X50
N90 Z-50
N100 RND=0
...
Page 6
Finished contour
Programmed contour
P2
Explanation:
Straight to P1, tangential rounding
with radius 10 mm
Straight to P2, rounding radius = 40 mm
Straight to P3
Code RNDM=
Code RNDM=0
Explanation:
Straight to P1, Tangential rounding
modal ON with radius 0,5 mm,
Straight, rounding with radius 0,5 mm,
Straight, rounding with radius 0,5 mm,
Straight, rounding with radius 0,5 mm,
modal rounding OFF
P1
Code RND=
840D/828D SINUMERIK Operate