Approaching A Fixed Point (G75) - Siemens SINUMERIK 840DE Programming Manual

Programming Motion Commands

4.20 Approaching a fixed point (G75)

4.20 Approaching a fixed point (G75)
Function
G75 can be used to approach fixed points, such as tool change locations, loading points,
pallet changing points, etc.
The positions of the individual points are specified in the machine coordinate system and
stored in the machine parameters.
You can approach these positions from any NC program, irrespective of the current tool or
workpiece position.
Programming
G75 FP= X1=0 Y1=0 Z1=0 U1=0 ...
Parameters
G75
FP=
X1= Y1= Z1=
Note
Two fixed point positions per machine axis can be specified in the machine parameters.
G75 is modal.
G75 "Approach fixed point" applies all offset values (DRF, external ZO and overlaid motion).
The fixed point corresponds to the actual value in the MCS.
Changes to the DRF and external zero offset while the G75 block is being preprocessed and
executed in the main run are not applied. You should prevent this problem by programming
STOPPRE in front of the G75 block.
Kinematic transformation must be deselected before fixed point approach is performed.
4-66
Fixed point approach
The fixed point approach is described by a fixed point and
axes, which are to be traversed to the fixed point FP.
Number of fixed point to be approached
Number of the fixed point FP=...
If no fixed point number is specified, fixed point 1 is
automatically approached.
Machine axes to be traversed to the fixed point
Machine axis addresses X1, Y1 ...
Here, you specify with value 0 the axes, with which the
point is to be approached simultaneously. Each axis
traverses at the maximum axial velocity.
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Fundamentals