Cycle Parameters - HEIDENHAIN TNC 640 User Manual

Touch Probe Cycles: Automatic Workpiece Inspection | MEASURE HOLE (Cycle 421, DIN/ISO: G421)

Cycle parameters

Q273 Center in 1st axis (nom. value)? (absolute):
Center of the hole in the reference axis of the
working plane. Input range -99999.9999 to
99999.9999
Q274 Center in 2nd axis (nom. value)?
(absolute): Center of the hole in the minor axis
of the working plane. Input range -99999.9999 to
99999.9999
Q262 Nominal diameter?: Enter the diameter of
the hole. 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
HEIDENHAIN | User's manual for cycle programming | 10/2017
NC blocks
5 TCH PROBE 421 MEASURE HOLE
Q273=+50 ;CENTER IN 1ST AXIS
Q274=+50 ;CENTER IN 2ND AXIS
Q262=75 ;NOMINAL DIAMETER
Q325=+0 ;STARTING ANGLE
Q247=+60 ;STEPPING ANGLE
Q261=-5 ;MEASURING HEIGHT
Q320=0 ;SET-UP CLEARANCE
Q260=+20 ;CLEARANCE HEIGHT
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