Calibrate Touch Probe Via Two Points G748 - HEIDENHAIN CNC PILOT 640 User Manual

Touch probe cycles | Calibrating touch probes

Calibrate touch probe via two points G748

Cycle G748 measures two opposite points and computes the touch
probe adjustment dimension and 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.
Further information: "Touch probe cycles for automatic mode",
Page 521
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 Max.
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 Max. deviation WE, the program
run is interrupted and an error message is displayed.
Parameters:
K: Incr. meas path w/ Ri. (the algebraic sign determines the
probing direction) – maximum measuring path for probing
RB: Circumnav. dir. offset – distance
RC: Measuring direction offset – distance for pre-positioning
before the second measurement
AC: Target pos. nominal value – touch point coordinate
EC: Nominal width – coordinate for the second probing position
BE: -Tolerance width +/ – range for the second measurement
result in which no compensation is applied
WE: Max. deviation – probe twice and monitor the dispersion of
the measured values
F: Measuring feed – 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.
Q: Tool orientation (machine-dependent)
Orient the touch probe in the programmed probing direction
before each probing operation.
P: PRINT outputs
0: OFF – do not display measuring results
1: ON – display measuring results on the screen
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
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