HEIDENHAIN TNC 620 (81760x-02) Cycle programming - Manual (Page 351)

DATUM FROM OUTSIDE OF CORNER (Cycle 414, DIN/ISO: G414,
software option 17)
14.8
14
TNC 620 | User's Manual Cycle Programming | 2/2015
351
14.8 DATUM FROM OUTSIDE OF CORNER
(Cycle 414, DIN/ISO: G414, software
option 17)
Cycle run
Touch Probe Cycle 414 finds the intersection of two lines and
defines it as the datum. If desired, the TNC can also enter the
intersection into a datum table or preset table.
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 touch point 1 (see
figure at upper right). The TNC offsets the touch probe by the
safety clearance in the direction opposite to the respective
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). The TNC derives the probing direction automatically
from the programmed 3rd measuring point.
1 Then the touch probe moves to the next starting position 2 and
from there probes the second position.
2 The TNC positions the probe to starting point 3 and then to
starting point 4 to probe the third and fourth touch points.
3 Finally the TNC returns the touch probe to the clearance height
and processes the determined datum depending on the cycle
parameters Q303 and Q305 (see "Characteristics common to all
touch probe cycles for datum setting", page 326) and saves the
coordinates of the determined corner in the Q parameters listed
below.
4 If desired, the TNC subsequently measures the datum in the
touch probe axis in a separate probing.
Parameter number Meaning
Q151 Actual value of corner in reference axis
Q152 Actual value of corner in minor axis