Siemens SINUMERIK 828D Operating Manual page 518

Programming technology functions (cycles)
9.5 Contour milling
parameters
Machining
surface
(only for ShopTurn)
PL
(only for G code)
ϕ
(only ShopTurn)
G17 G19
or or
face C/Y/B peripheral
surface C/Y
X Y
Y Z
X Y
Y Z
Starting point
L1
ϕ1
Additional commands
518
Description
Face C
•
Face Y
•
Face B
•
Peripheral surface C
•
Peripheral surface Y
•
Machining plane
G17 (XY)
•
G19 (YZ)
•
Cylinder diameter
(only peripheral surface C)
Cartesian:
Starting point X or Y (abs)
Starting point Y or Z (abs)
Polar:
Position pole (abs)
Position pole (abs)
Distance to pole, end point (abs)
Polar angle to the pole, end point (abs)
You can program feedrates and M commands, for example, using additional G
code commands. However, carefully ensure that the additional commands do
not collide with the generated G code of the contour and are compatible with
the machining type required. Therefore, do not use any G code commands of
group 1 (G0, G1, G2, G3), no coordinates in the plane and no G code com-
mands that have to be programmed in a separate block.
The contour is finished in continuous-path mode (G64). As a result, contour
transitions such as corners, chamfers or radii may not be machined precisely.
If you wish to avoid this, then it is possible to use additional commands when
programming.
Example: F or a contour, first program the straight X parallel and then enter
"G9" (non-modal exact stop) for the additional command parameter. Then pro-
gram the Y-parallel straight line. The corner will be machined exactly, as the
feedrate at the end of the X-parallel straight line is briefly zero.
Note:
The additional commands are only effective for path milling!
Operating Manual, 01/2015, 6FC5398-8CP40-5BA2
Unit
mm
mm
mm
mm
mm
mm
Degrees
Turning