HEIDENHAIN TNC 620 (81760x-01) Cycle programming - Manual (Page 401)

MEASURE RIDGE WIDTH (Cycle 426, DIN/ISO: G426, software
option 17)
16.10
16
TNC 620 | User's Manual Cycle Programming | 3/2014
401
16.10 MEASURE RIDGE WIDTH (Cycle 426,
DIN/ISO: G426, software option 17)
Cycle run
Touch Probe Cycle 426 measures the position and width of a ridge.
If you define the corresponding tolerance values in the cycle, the
TNC makes a nominal-to-actual value comparison and saves the
deviation value in system parameters.
1 Following the positioning logic, the TNC positions the touch
probe at rapid traverse (value from FMAX column) (see
"Executing touch probe cycles", page 294) to touch point 1 . The
TNC calculates the touch points from the data in the cycle and
the safety clearance from the
SET_UP column of the touch
probe table.
2 Then the touch probe moves to the entered measuring height
and runs the first probing process at the probing feed rate
(column
F). 1. The first probing is always in the negative
direction of the programmed axis.
3 Then the touch probe moves at clearance height to the next
starting position and probes the second touch point.
4 Finally the TNC returns the touch probe to the clearance height
and saves the actual values and the deviation value in the
following Q parameters:
Parameter number Meaning
Q156 Actual value of measured length
Q157 Actual value of the centerline
Q166 Deviation of the measured length
Please note while programming:
Before a cycle definition you must have programmed
a tool call to define the touch probe axis.