HEIDENHAIN TNC 320 (34055x-06) Cycle programming User Manual
Page 302
Touch Probe Cycles: Automatic Datum Setting
15.6 DATUM FROM INSIDE OF CIRCLE (Cycle 412, DIN/ISO: G412)
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TNC 320 | User's Manual Cycle Programming | 5/2013
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
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. Input range
-99999.9999 to 99999.9999
Set-up clearance Q320 (incremental): Additional
distance between measuring point and ball tip.
Q320 is added to
SET_UP (touch probe table). Input
range 0 to 99999.9999
Clearance height Q260 (absolute): Coordinate in
the touch probe axis at which no collision between
touch probe and workpiece (fixtures) can occur.
Input range -99999.9999 to 99999.9999
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
Datum number in table Q305: Enter the number in
the datum/preset table in which the TNC is to save
the coordinates of the pocket center. If you enter
Q305=0, the TNC automatically sets the display so
that the new datum is at the center of the pocket.
Input range 0 to 2999
New datum for reference axis Q331 (absolute):
Coordinate in the reference axis at which the TNC
should set the pocket center. Default setting = 0.
Input range -99999.9999 to 99999.9999
New datum for minor axis Q332 (absolute):
Coordinate in the minor axis at which the TNC
should set the pocket center. Default setting = 0
input range -99999.9999 to 99999.9999
NC blocks
5 TCH PROBE 412 DATUM INSIDE
CIRCLE
Q321=+50
;CENTER IN 1ST AXIS
Q322=+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
Q301=0
;MOVE TO CLEARANCE
Q305=12
;NO. IN TABLE
Q331=+0
;DATUM
Q332=+0
;DATUM
Q303=+1
;MEAS. VALUE
TRANSFER
Q381=1
;PROBE IN TS AXIS
Q382=+85
;1ST CO. FOR TS AXIS
Q383=+50
;2ND CO. FOR TS AXIS
Q384=+0
;3RD CO. FOR TS AXIS
Q333=+1
;DATUM
Q423=4
;NO. OF PROBE POINTS
Q365=1
;TYPE OF TRAVERSE