HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 468)

468 Touch probe cycles
5.8 Angular measur
ement
5.8 Angular measurement
Angular measurement G787
Cycle G787 probes twice in the programmed direction and computes
the angle. If the tolerance value defined in the cycle is exceeded, the
cycle saves the measured deviation for a subsequent misalignment
compensation. Program Cycle G788 next in order to activate the
misalignment compensation. 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
retracted. Then the touch probe is pre-positioned for the second
measurement and the workpiece is probed.
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: G787 Angular measurement
. . .
MACHINING
N3 G787 R1 D0 BR0 K2 WS-2 WC15 AC170 BE1
RC0 BD0.2 WT3 Q0 P0 H0
. . .
Parameters
R
Evaluation:
 1: Prepare tool compensation and misalignment
compensation:
 2: Prepare misalignment compensation
 3: Angle output:
D Directions:
 0: X measurement, Z offset
 1: Y measurement Z offset
 2: Z measurement, X offset
 3: Y measurement, X offset
 4: Z measurement, Y offset
 5: X measurement, Y offset
K Incremental measuring path (signed): Maximum measuring path
for probing. The algebraic sign determines the probing direction.
WS Position of first measuring point
WC Position of second measuring point
AC Nominal angle of measured surface
BE
Angle tolerance +/-: Measurement result range (in degrees) in
which no compensation is applied
RC Target position of first measurement: Nominal value of first
measuring point
BD Tolerance of first measurement +/-: Range for the measurement
result in which no compensation is applied