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14
Touch Probe Cycles: Automatic Datum Setting
14.1 Fundamentals
Characteristics common to all touch probe cycles for
datum setting
You can also run the Touch Probe Cycles 408 to 419
during an active rotation (basic rotation or Cycle 10).
Datum point and touch probe axis
From the touch probe axis that you have defined in the measuring
program the TNC determines the working plane for the datum.
Active touch probe axis
Z
Y
X
Saving the calculated datum
In all cycles for datum setting you can use the input parameters
Q303 and Q305 to define how the TNC is to save the calculated
datum:
Q305 = 0, Q303 = any
datum in the display. The new datum is active immediately. At
the same time, the TNC saves the datum set in the display by
the cycle in line 0 of the preset table.
Q305 not equal to 0, Q303 = –1
326
Set reference point in
X and Y
Z and X
Y and Z
value: The TNC sets the calculated
HEIDENHAIN | TNC 320 | User's manual for cycle programming | 9/2016
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