Reference Point Approach: G74 - Siemens SINUMERIK 808D User Manual

C ommand
G75
FP=<n>
X=0 Y=0 Z=0
Programming example
N05 G75 FP=1 Z=0
N10 G75 FP=2 X=0 Y=0
N30 M30
N o te
The programmed position values for X, Y, Z (any value, here = 0) are ignored, but must still be written.
11.6.2

Reference point approach: G74

Fu n ctionality
The reference point can be approached in the NC program with G74. The direction and speed of each axis are stored in
machine data.
G74 requires a separate block and is non-modal. The machine axis identifier must be programmed!
In the block after G74, the previous G command of the "Interpolation type" group (G0, G1,G2, ...) is active again.
Programming example
N10 G74 X=0 Y=0 Z=0
N o te
The programmed position values for X, Y, Z (any value, here = 0) are ignored, but must still be written.
11.7 Acceleration control and exact stop/continuous path
11.7.1 Acceleration pattern: BRISK, SOFT
BR ISK
The axes of the machine change their velocities using the maximum permissible acceleration value until reaching the final
velocity. BRISK allows time-optimized working. The set velocity is reached in a short time. However, jumps are present in
the acceleration pattern.
SOFT
The axes of the machine accelerate along a non-linear, constant characteristic until reaching the final velocity. With this jerk-
free acceleration, SOFT allows for reduced machine load. The same behavior can also be applied to braking procedures.
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
Si gnificance
Fixed point approach
Fixed point that is to be approached. The fixed point number is specified: <n>
Value range of <n>: 1, 2, 3, 4
MD30610$NUM_FIX_POINT_POS should be set if fixed point number 3 or 4 is to be used.
If no fixed point is specified, fixed point 1 is approached automatically.
Machine axes to be traversed to the fixed point.
Here, specify the axes with value "0" with which the fixed point is to be approached simultaneous-
ly.
Each axis is traversed with the maximum axial velocity.
; Approach fixed point 1 in Z
; Approach fixed point 2 in X and Y, e.g. to
change a tool
; End of program
105