Approaching A Fixed Point (G75) - Siemens Sinumerik 840D sl Programming Manual

Supplementary commands

15.5 Approaching a fixed point (G75)

Meaning
G74:
X1=0 Y1=0 Z1=0 ... :
A1=0 B1=0 C1=0 ... :
Note
A transformation must not be programmed for an axis which is to approach the reference point
with G74.
The transformation is deactivated with command TRAFOOF.
Example
When the measuring system is changed, the reference point is approached and the workpiece
zero point is set up.
Program code
N10 SPOS=0
N20 G74 X1=0 Y1=0 Z1=0 C1=0
N30 G54
N40 L47
N50 M30
15.5 Approaching a fixed point (G75)
The non-modal command G75 can be used to move axes individually and independently of
one another to fixed points in the machine space, e.g. to tool change points, loading points,
pallet change points, etc.
The fixed points are positions in the machine coordinate system which are stored in the
machine data (MD30600 $MA_FIX_POINT_POS[n]). A maximum of four fixed points can be
defined for each axis.
The fixed points can be approached from every NC program irrespective of the current tool or
workpiece positions. An internal preprocessing stop is executed prior to moving the axes.
356
G function call for reference point approach
The specified machine axis address X1, Y1, Z1 ... for linear axes is
approached as the reference point.
The specified machine axis address A1, B1, C1 ... for rotary axes is
approached as the reference point.
Comment
;Spindle in position control
;Reference point approach for linear axes and
rotary axes
; Zero offset
;Cutting program
; End of program
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals