Cycle Parameters - HEIDENHAIN TNC 640 User Manual

Touch Probe Cycles: Automatic Measurement of Workpiece Misalignment | Compensating workpiece
misalignment by rotating the C axis (Cycle 405, DIN/ISO: G405)

Cycle parameters

Q321 Center in 1st axis? (absolute): Center of the
hole in the reference axis of the working plane.
Input range -99999.9999 to 99999.9999
Q322 Center in 2nd axis? (absolute): Center of
the hole 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 (angle of the hole center).
Input range -99999.9999 to 99999.9999
Q262 Nominal diameter?: Approximate diameter
of the circular pocket (or hole). Enter a value that
is more likely to be too small than too large. Input
range 0 to 99999.9999
Q325 Starting angle? (absolute): Angle between
the reference axis of the working plane and the
first touch point. Input range -360.000 to 360.000
Q247 Intermediate stepping angle?
(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
Q261 Measuring height in probe axis? (absolute):
Coordinate of the ball tip center (= touch point) in
the touch probe axis in which the measurement
is to be made. Input range -99999.9999 to
99999.9999
Q320 Set-up clearance? (incremental): Define
an additional distance between measuring point
and ball tip. Q320 is added to SET_UP in the touch
probe table. Input range 0 to 99999.9999
Q260 Clearance height? (absolute): coordinate in
the touch probe axis at which no collision between
tool and workpiece (fixtures) can occur. Input
range -99999.9999 to 99999.9999
Q301 Move to clearance height (0/1)?: Definition
of how the touch probe is to move between the
measuring points:
0: Move at measuring height between measuring
points
1: Move at clearance height between measuring
points
Q337 Set to zero after alignment?:
0: Set display of the C axis to 0 and write the
C_Offset of the active row in the datum table
>0: Write the measured angular offset in the
datum table. Row number = value of Q337 . If a C-
axis shift is registered in the datum table, the TNC
adds the measured angular misalignment.
HEIDENHAIN | User's manual for cycle programming | 10/2017
NC blocks
5 TCH PROBE 405 ROT IN C AXIS
Q321=+50 ;CENTER IN 1ST AXIS
Q322=+50 ;CENTER IN 2ND AXIS
Q262=10 ;NOMINAL DIAMETER
Q325=+0 ;STARTING ANGLE
Q247=90 ;STEPPING ANGLE
Q261=-5 ;MEASURING HEIGHT
Q320=0 ;SET-UP CLEARANCE
Q260=+20 ;CLEARANCE HEIGHT
Q301=0 ;MOVE TO CLEARANCE
Q337=0 ;SET TO ZERO
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