Circular Measurement; Circular Measurmnt G785 - HEIDENHAIN CNC PILOT 640 User Manual

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5.7

Circular measurement

Circular measurmnt G785

Cycle G785 determines the circle center and diameter by probing
three times in the programmed plane and shows the measured
values on the control screen. The result of the measurement is
saved additionally in the variable #i99.
Further information:
Page 521
Cycle run: From the current position the touch probe moves in the
defined measuring plane 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. Another two
probing operations are carried out with the defined stepping angle.
If a Starting diameter D was programmed, the cycle positions the
touch probe on a circular path before the respective measuring
process.
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:
R: Measuring plane
0: X/Y plane G17 – probe circle in X/Y plane
1: Z/X plane G18 – probe circle in Z/X plane
2: Y/Z plane G19 – probe circle in Y/Z plane
BR: -Inside/outside
0: Inside: Probe inside diameter
1: Outside: Probe outside diameter
K: Measuring path (the algebraic sign determines the probing
direction) – maximum measuring path for probing
C: Angle of 1st measurement – angle for the first probing
operation
RC: Incremental angle – stepping angle for the subsequent
probing operations
D: Starting diameter – diameter on which the touch probe is
pre-positioned before the measurements
WB: Position in infeed direct. – measuring height to which
the touch probe is positioned before the measuring process (no
input: The circle is probed from the current position)
I: Circle center in axis 1 – nominal position of the circle center
in first axis
J: Circle center in axis 2 – nominal position of the circle center
in second axis
WE: Max. deviation – probe twice and monitor the dispersion
of the measured values
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"Touch probe cycles for automatic mode",
Touch probe cycles | Circular measurement
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017