Siemens SINUMERIK 828D Programming Manual page 416

Supplementary commands
14.5 Fixed-point approach (G75, G751)
Working area limitation in the workpiece coordinate system/SZS
Coordinate-system-specific working area limitation (
block with
block.
Axis/Spindle movements with POSA/SPOSA
If programmed axes/spindles were previously traversed with
will be completed first before the fixed point is approached.
Spindle functions in the G75/G751 block
If the spindle is excluded from "Fixed-point approach", then additional spindle functions (e.g.
positioning with
Modulo axes
In the case of modulo axes, the fixed point is approached along the shortest distance.
References
For further information about "Fixed-point approach", see:
Function Manual, Extended Functions; Manual and Handwheel Travel (H1), Chapter: "Fixed-
point approach in JOG"
416
/ . The destination point is monitored as the starting point of the following
G75 G751
/ ) can be programmed in the
SPOS SPOSA
... ) is not effective in the
WALCS0 WALCS10
or
POSA SPOSA
/ block.
G75 G751
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
, these movements
Fundamentals