HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 447)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 447
5.4 Calibr
a
ting t
ouc
h pr
obes
5.4 Calibrating touch probes
Calibrate touch probe standard G747
Cycle G747 measures with the programmed axis and, depending on
the selected calibration method, calculates the touch probe
adjustment dimension or the ball diameter. If the tolerance values
defined in the cycle are exceeded, the cycle corrects the touch probe
data. The result of the measurement is saved additionally in the
variable #i99. (See "Touch probe cycles for automatic operation" on
page 429.)
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: G747 Calibrate touch probe
. . .
MACHINING
N3 G747 R1 K20 AC10 BD0.2 Q0 P0 H0
. . .
Parameters
R
Calibration method:
 0: Change ball diameter
 1: Change adjustment dimension
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.