Characteristics Common To All Touch Probe Cycles For Datum Setting - HEIDENHAIN TNC 620 User Manual

15
Touch Probe Cycles: Automatic Datum Setting
15.1 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
This combination can only occur if you
read in programs containing Cycles 410 to 418
created on a TNC 4xx
read in programs containing Cycles 410 to 418
created with an older software version on an iTNC
530
did not specifically define the measured-value
transfer with parameter Q303 when defining the
cycle.
In these cases the TNC outputs an error message,
since the complete handling of REF-referenced
datum tables has changed. You must define a
measured-value transfer yourself with parameter
Q303.
Q305 not equal to 0, Q303 = 0
reference point in the active datum table. The reference
system is the active workpiece coordinate system. The value of
parameter Q305 determines the datum number.
datum with Cycle 7 in the part program.
Q305 not equal to 0, Q303 = 1
reference point in the preset table. The reference system is
the machine coordinate system (REF coordinates). The value of
parameter Q305 determines the preset number.
preset with Cycle 247 in the part program.
322
Datum setting in
X and Y
Z and X
Y and Z
value: The TNC sets the calculated
The TNC writes the calculated
The TNC writes the calculated
Activate the
Activate the
TNC 620 | User's Manual Cycle Programming | 3/2014