HEIDENHAIN TNC 620 (81760x-02) Cycle programming - Manual (Page 386)

Touch Probe Cycles: Automatic Workpiece Inspection
15.4 MEASURE ANGLE (Cycle 420, DIN/ISO: G420, software option 17)
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TNC 620 | User's Manual Cycle Programming | 2/2015
15.4 MEASURE ANGLE (Cycle 420,
DIN/ISO: G420, software option 17)
Cycle run
Touch Probe Cycle 420 measures the angle that any straight
surface on the workpiece describes with respect to the reference
axis of the working plane.
1 Following the positioning logic, the TNC positions the touch
probe at rapid traverse (value from
FMAX column) (see
"Executing touch probe cycles", page 298) to the programmed
touch point
1 . The TNC offsets the touch probe by the safety
clearance in the direction opposite to the defined traverse
direction.
2 Then the touch probe moves to the entered measuring height
and runs the first probing process at the probing feed rate
(column
F).
3 Then the touch probe moves to the next starting position 2 and
from there probes the second position.
4 The TNC returns the touch probe to the clearance height and
saves the measured angle in the following Q parameter:
Parameter number Meaning
Q150 The measured angle is referenced to
the reference axis of the machining
plane.
Please note while programming:
Before a cycle definition you must have programmed
a tool call to define the touch probe axis.
If touch probe axis = measuring axis, set
Q263
equal to
Q265 if the angle about the A axis is to be
measured; set
Q263 not equal to Q265 if the angle is
to be measured about the B axis.