Siemens SINUMERIK 840D sl Programming Manual page 967

Machining with rotatable tools
Note
Use the tangential control function if you wish to position rotatable tools at a tangent to the
programmed path.
Use of M commands
As in earlier versions, macro technology allows special M functions to be used instead of
language commands (compatibility). The M functions and equivalent language commands as
used in earlier systems are as follows:
M20, M23
M22
M25
M26
Example for macro file:
Program code
DEFINE M25 AS PON
DEFINE M125 AS PONS
DEFINE M22 AS SON
DEFINE M122 AS SONS
DEFINE M26 AS PDELAYON
DEFINE M20 AS SPOF
DEFINE M23 AS SPOF
Programming example:
Program code
...
N100 X100 M20
N110 X120 M22
N120 X150 Y150 M25
...
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
≙
SPOF
≙
SON
≙
PON
≙
PDELAYON
Comment
; Punching on
; Punching with leader on
; Nibbling on
; Nibbling with leader on
; Punching with delay on
; Punching, nibbling off
; Punching, nibbling off
Comment
; Position without punch initiation.
; Activate nibbling, initiate stroke before and af-
ter motion.
; Activate punching, initiate stroke at end of mo-
tion.
Work preparation
3.19 Punching and nibbling
967