HEIDENHAIN TNC 620 (34056x-04) Cycle programming - Manual (Page 329)

DATUM FROM OUTSIDE OF CIRCLE (Cycle 413, DIN/ISO: G413,
software option 17)
15.7
15
TNC 620 | User's Manual Cycle Programming | 5/2013
329
Please note while programming:
Danger of collision!
To prevent a collision between touch probe and
workpiece, enter a
high estimate for the nominal
diameter of the stud.
Before a cycle definition you must have programmed
a tool call to define the touch probe axis.
The smaller the angle increment Q247, the less
accurately the TNC can calculate the datum.
Minimum input value: 5°.
If you set a datum (Q303 = 0) with the touch probe
cycle and also use probe in TS axis (Q381 = 1), then
no coordinate transformation must be active.
Cycle parameters
Center in 1st axis Q321 (absolute): Center of the
stud in the reference axis of the working plane.
Input range -99999.9999 to 99999.9999
Center in 2nd axis Q322 (absolute): Center of the
stud in the minor axis of the working plane. If you
program Q322 = 0, the TNC aligns the hole center
to the positive Y axis. If you program Q322 not
equal to 0, then the TNC aligns the hole center to
the nominal position. Input range -99999.9999 to
99999.9999
Nominal diameter Q262: Approximate diameter of
the stud. Enter a value that is more likely to be too
large than too small. Input range 0 to 99999.9999
Starting angle Q325 (absolute): Angle between the
reference axis of the working plane and the first
touch point. Input range -360.000 to 360.000
Stepping angle Q247 (incremental): Angle between
two measuring points. The algebraic sign of the
stepping angle determines the direction of rotation
(negative = clockwise) in which the touch probe
moves to the next measuring point. If you wish to
probe a circular arc instead of a complete circle,
then program the stepping angle to be less than
90°. Input range -120.000 to 120.000