HEIDENHAIN TNC 426B (280 472) Touch Probe Cycles - Manual (Page 87)

HEIDENHAIN TNC 426, TNC 430 75
3.3 A
u
to
matic W
o
rk
piece Measur
ement
U U U U Traverse direction 1 Q267: direction in which the
probe is to approach the workpiece:
-1: Negative traverse direction
+1: Positive traverse direction
U U U U Measuring height in the touch probe axis Q261
(absolute): coordinate of the ball tip center (= touch
point) in the touch probe axis in which the
measurement is to be made.
U U U U Setup clearance Q320 (incremental): additional
distance between measuring point and ball tip. Q320
is added to MP6140.
U U U U Clearance height Q260 (absolute): coordinate in the
touch probe axis at which no collision between tool
and workpiece (fixtures) can occur.
U U U U Traversing to clearance height Q301: 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
U U U U Measuring log Q281: definition of whether the TNC is
to create a measuring log:
0: No measuring log
1: Generate measuring log: with the standard setting
the TNC saves the log file TCHPR420.TXT in the
directory in which your measuring program is also
stored.
If touch probe axis = measuring axis, then:
Set Q263 equal to Q265, if the angle about the A axis is to
be measured; Set Q263 not equal to Q265 if the angle is
to be measured about the B axis.
Example: NC blocks
5 TCH PROBE 420 MEASURE ANGLE
Q263=+10 ;1ST POINT 1ST AXIS
Q264=+10 ;1ST POINT 2ND AXIS
Q265=+15 ;2ND POINT 1ST AXIS
Q266=+95 ;2ND POINT 2ND AXIS
Q272=1 ;MEASURING AXIS
Q267=-1 ;TRAVERSE DIRECTION
Q261=-5 ;MEASURING HEIGHT
Q320=0 ;SET-UP CLEARANCE
Q260=+10 ;CLEARANCE HEIGHT
Q301=1 ;TRAVERSE TO CLEAR HEIGHT
Q281=1 ;MEASURING LOG