HEIDENHAIN iTNC 530 (34049x-08) Cycle programming - Manual (Page 382)

382 Touch probe cycles: automatic datum setting
15.8
D
A
TUM
FR
OM
OUTSIDE
OF
CORNER
(Cy
cle
414,
DIN/ISO:
G414)
15.8 DATUM FROM OUTSIDE OF
CORNER (Cycle 414,
DIN/ISO: G414)
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 (see "Executing touch probe cycles"
on page 332), the TNC positions the touch probe at rapid traverse
(value from MP6150) to the first touch point 1 (see figure at upper
right). The TNC offsets the touch probe by the safety clearance in
the direction opposite the respective traverse direction.
2 Then the touch probe moves to the entered measuring height and
probes the first touch point at the probing feed rate (MP6120). The
TNC derives the probing direction automatically from the
programmed 3rd measuring point.
3 Then the touch probe moves to the next starting position 2 and
probes the second position.
4 The TNC positions the probe to starting point 3 and then to starting
point 4 to probe the third and fourth touch points.
5 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 "Saving the calculated datum" on
page 358) and saves the coordinates of the determined corner in
the Q parameters listed below.
6 If desired, the TNC subsequently measures the datum in the touch
probe axis in a separate probing.
X
Y
1 2
4
3
X
Y
X
Y
X
Y
X
Y
A B
C D
1 2
3
2 1
3
1 2
3
2 1
3
Parameter number Meaning
Q151 Actual value of corner in reference axis
Q152 Actual value of corner in minor axis