Touch Probe Cycles: Automatic Datum Setting
14.2 DATUM SLOT CENTER (Cycle 408, DIN/ISO: G408)
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HEIDENHAIN | TNC 320 | User’s manual for cycle programming | 9/2016
Cycle parameters
Q321 Center in 1st axis? (absolute): Center of the
slot in the reference axis of the working plane. Input
range -99999.9999 to 99999.9999
Q322 Center in 2nd axis? (absolute): Center of
the slot in the secondary axis of the working plane.
Input range -99999.9999 to 99999.9999
Q311 Width of slot? (incremental): Width of the
slot, regardless of its position in the working plane.
Input range 0 to 99999.9999
Q272 Measuring axis (1=1st / 2=2nd)?: Axis in the
working plane in which the measurement is to be
made:
1: Reference axis = measuring axis
2: Minor axis = measuring axis
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
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
Q305 Number in table?: Enter the number in the
datum/preset table in which the TNC is to save
the coordinates of the slot center. If Q303=1: If
you enter Q305=0, the TNC automatically sets the
display so that the new datum is on the slot center.
If Q303=0: If you enter Q305=0, the TNC writes to
line 0 of the datum table. Input range 0 to 99999
Q405 New datum? (absolute): Coordinate in the
measuring axis at which the TNC should set the
calculated slot center. Default setting = 0. Input
range -99999.9999 to 99999.9999
Q303 Meas. value transfer (0,1)?: Specify if the
determined basic rotation is to be saved in the
datum table or in the preset table:
0: Write the measured basic rotation as datum shift
active datum table. The reference system is the
active workpiece coordinate system
1: Write the measured basic rotation into the
preset table. The reference system is the machine
coordinate system (REF system).
NC blocks
5 TCH PROBE 408 SLOT CENTER REF
PT
Q321=+50 ;CENTER IN 1ST AXIS
Q322=+50 ;CENTER IN 2ND AXIS
Q311=25 ;SLOT WIDTH
Q272=1 ;MEASURING AXIS
Q261=-5 ;MEASURING HEIGHT
Q320=0 ;SET-UP CLEARANCE
Q260=+20 ;CLEARANCE HEIGHT
Q301=0 ;MOVE TO CLEARANCE
Q305=10 ;NUMBER IN TABLE
Q405=+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
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