Siemens SINUMERIK 840D sl Programming Manual page 330

Fundamentals
2.12 Coordinate transformations (frames)
Example 2: Turning
Program code
N10 TRANS X0 Z140
...
N30 TRANS X0 Z600
N40 AMIRROR Z0
N50 ATRANS Z120
...
Further information
MIRROR X... Y... Z...
The mirror is programmed by means of an axial change of direction in the selected working
plane.
Example: Working plane G17 X/Y
The mirror (on the Y axis) requires a direction change in X and, accordingly, is programmed with
MIRROR X0. The contour is then mirrored on the opposite side of the mirror axis Y.
330
The actual machining is stored as a subpro‐
gram and execution at the respective spindle
is implemented by means of mirroring and off‐
sets.
Comment
; Zero offset to W
; Machining of the first side with spindle 1
; Zero offset to spindle 2
; Mirroring of the Z axis
; Zero offset to W1
; Machining of the second side with spindle 2
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming