HEIDENHAIN TNC 620 (340 56x-02) Cycle programming - Manual (Page 317)

HEIDENHAIN TNC 620 317
15.3 D
A
TUM RIDGE CENTER (Cy
c
le 409, DIN/ISO: G409)
15.3 DATUM RIDGE CENTER
(Cycle 409, DIN/ISO: G409)
Cycle run
Touch Probe Cycle 409 finds the center of a ridge and defines its
center as datum. If desired, the TNC can also enter the coordinates
into a datum table or the preset table.
1 The TNC positions the touch probe to the starting point 1 at rapid
traverse (value from FMAX column) following the positioning logic
(see “Executing touch probe cycles” on page 283). 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
probes the first touch point at the probing feed rate (column F).
3 Then the touch probe moves at clearance height to the next touch
point
2 and probes the second touch point.
4 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 312) and saves the actual values in the Q parameters
listed below.
5 If desired, the TNC subsequently measures the datum in the touch
probe axis in a separate probing.
Please note while programming:
X
Y
1
2
Parameter number Meaning
Q166 Actual value of measured ridge width
Q157 Actual value of the centerline
Danger of collision!
To prevent a collision between touch probe and
workpiece, enter a high estimate for the ridge width.
Before a cycle definition you must have programmed a
tool call to define the touch probe axis.