Special Functions; Contour Repetition (G72.1, G72.2) - Siemens Sinumerik 840D sl Programming Manual

4.8

Special functions

4.8.1

Contour repetition (G72.1, G72.2)

Does not function in SINUMERIK 802D sl.
A contour programmed once can be repeated easily with G72.1 and G72.2. This function
can be used to create either a linear copy (G72.2) or a rotational copy (G72.1).
Format
G72.1 X... Y... (Z...) P... L... R...
X, Y, Z: Reference point for coordinate rotation
P: Subroutine number
L: Number of subroutine passes
R: Roll angle
A subroutine containing the contour to be copied can be called multiple times with G72.1.
The coordinate system is rotated by a certain angle before calling each subroutine. The
coordinate rotation is executed around a vertical axis on the selected plane.
G72.2 I... J... K... P... L...
I, J, K: Position to which the X, Y Z axes are traversed before calling the subroutine.
P: Subroutine number
L: Number of subroutine passes
A subroutine containing the contour to be repeated can be called multiple times with G72.2.
The axes programmed with I, J and K must be traversed incrementally before each
subroutine call. The cycle (CYCLE3721) is used to call the subroutine as often as is
specified in Address "L". A distance programmed in I, J and K and calculated from the
starting point is traversed before each subroutine call.
ISO Milling
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
Additional functions
4.8 Special functions
135