HEIDENHAIN SW 548328-05 DIN Programming - Manual (Page 435)

HEIDENHAIN MANUALplus 620, CNC PILOT 620/640
435
5.2 T
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uc
h pr
obe cy
cles f
or single-point measur
ement
Single-point measurement for zero point G771
Cycle G771 measures with the programmed measuring axis in the
specified direction. If the tolerance value defined in the cycle is
exceeded, the cycle saves the measured deviation as zero point shift.
The result of the measurement is saved additionally in the variable
#i99 (See "Touch probe cycles for automatic operation" on page 431.).
Cycle run
From the current position the touch probe moves along the defined
measuring axis toward the measuring point. When the stylus touches
the workpiece, the measured value is saved and the touch probe is
positioned back to the starting point.
The control outputs an error message if the touch probe does not
reach any touch point within the defined measuring path. If a
maximum deviation WE was programmed, the measuring point is
approached twice and the mean value is saved as result. If the
difference of the measurements is greater than the maximum
deviation WE, the program run is interrupted and an error message is
displayed.
Example: G771 Single-point measurement for tool
compensation
. . .
MACHINING
N3 G771 R1 D0 K20 AC0 BD0.2 Q0 P0 H0
. . .
Parameters
R Type of zero point shift:
 1: Table and G59: Activate zero point shift and additionally
save in zero point table. The zero-point shift also remains
active after the program run.
 2: Activate zero point shift with G59 for the further program
run. Zero point shift no longer active after program run.
D Measuring axis: Axis in which the measurement is to be made
K Incremental measuring path with direction (signed): Maximum
measuring path for probing. The algebraic sign determines the
probing direction.
AC Nominal value for target position: Touch point coordinate
BD Tolerance +/-: Measurement result range in which no
compensation is applied
WE Maximum deviation: Probe twice and monitor the dispersion of
the measured values
F Measuring feed rate: Feed rate for probing. If nothing is entered,
the measuring feed rate from the touch probe table is used. If
the entered measuring feed rate F is higher than the one in the
touch probe table, the feed rate is reduced to the value from the
touch probe table.