Touch Probe Cycles: Automatic Workpiece Inspection
15.5 MEASURE HOLE (Cycle 421, DIN/ISO: G421)
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HEIDENHAIN | TNC 320 | User’s manual for cycle programming | 9/2016
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 secondary 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? 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
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): 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
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
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