Siemens SINUMERIK 828D Programming Manual page 414

Supplementary commands
14.5 Fixed-point approach (G75, G751)
Note
The following applies for
moving to an intermediate point cannot be programmed.
Note
The value of the address
each programmed axis (MD30610 $MA_NUM_FIX_POINT_POS).
Examples
Example 1: G75
For a tool change, axes X (= AX1) and Z (= AX3) need to move to the fixed machine axis
position 1 where X = 151.6 and Z = -17.3.
Machine data:
● MD30600 $MA_FIX_POINT_POS[AX1,0] = 151.6
● MD30600 $MA_FIX_POINT[AX3,0] = 17.3
NC program:
Program code
...
N100 G55
N110 X10 Y30 Z40
N120 G75 X0 Z0 FP=1 M0
N130 X10 Y30 Z40
...
Note
If the "Tool management with magazines" function is active, the auxiliary function
(typically
Reason: With "Tool management with magazines is active", auxiliary functions for tool
change are not output to the PLC.
414
: Axes which are to only approach the fixed point without first
G751
must not be greater than the number of fixed points specified for
FP
) will not be sufficient to trigger a block change inhibit at the end of
M6
Comment
; Activate adjustable work offset.
; Approach positions in workpiece coordinate system.
; The X axis moves to 151.6 and the Z axis moves to
17.3 (in the machine coordinate system). Each axis
travels at the maximum velocity it is capable of
reaching. No additional movements are permitted to
be active in this block. To continue to prevent any
additional movements once the end positions have
been reached, a stop is inserted here.
; The position of N110 is approached again. The work
offset is reactivated.
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
or
T... M...
motion.
G75
Fundamentals