Siemens SINUMERIK 840D sl Programming Manual page 573

Note
Coupled axis motion is always executed in the base coordinate system (BCS).
The number of coupled axis groupings which may be simultaneously activated is limited only
by the maximum possible number of combinations of axes on the machine.
Example
The workpiece is to be machined on two sides with the axis configuration shown in the
diagram. To do this, you create two combinations of coupled axes.
Program code
...
N100 TRAILON(V,Y)
N110 TRAILON(W,Z,–1)
N120 G0 Z10
N130 G0 Y20
...
N200 G1 Y22 V25 F200
...
TRAILOF(V,Y)
TRAILOF(W,Z)
Job Planning
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
9.1 Coupled motion (TRAILON, TRAILOF)
Comments
; Activation of 1st coupled axis grouping
; Activation of 2nd coupled axis grouping, Negative
coupling factor: Coupled-motion axis traverses in the
opposite direction from leading axis.
; Infeed of Z and W axes in opposite axial directions.
; Infeed of Y and V axes in same axis
; Overlaying of a dependent and independent movement of
coupled motion axis V.
; Deactivation of 1st coupled axis grouping.
; Deactivation of 2nd coupled axis grouping.
Axis couplings
direction.
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