Tool Calibration With The Tt 110; Interfacing The Tt 110 - HEIDENHAIN TNC 415 Technical Manual

9.4 Tool calibration with the TT 110

The HEIDENHAIN TT 110 touch probe serves for measuring and inspecting tools. HEIDENHAIN
provides standard cycles for automatic tool measurement and calibration with the TT 110 (see
User's Manual).
Technical Prerequisites:
– TT 110
– TNC 4xx as of software version 280 58, 280 54, 280 56
– Central tool file TOOL.T must be active (via machine parameter)
– The machine must feature a controlled spindle (for spindle orientation)

9.4.1 Interfacing the TT 110

MP6500 enables the cycles for tool measurement. The cycles should only be enabled when a TT
110 is mounted and interfaced.
MP6505 defines the probing direction for tool radius measurement. For tool radius measurement,
MP6530 defines the distance from the tool bottom to the top of the probe contact. In the tool table
an additional tool-specific offset is entered in the field L-OFFS. MP6540 defines a safety zone around
the probe contact of the TT 110. When a cycle for tool measurement is started the tool moves
automatically from the "clearance height" entered in the cycle at the feed rate defined in MP6550 to
the limit of the safety zone.
The probe disk diameter or the cube edge length is entered in MP6531. The coordinates of the
probe contact centre referenced to the machine datum is entered in MP6580.
For calibrating and measuring individual teeth, the spindle must be brought to a stop at a defined
angular orientation. MP6560 defines whether the spindle is oriented directly through the NC or
through the PLC. If the spindle is oriented by the NC, the PLC need only reset the Marker M2499. If
the PLC orients the spindle the number of the M function is entered in MP6560. The respective
positions are then transferred as for the "Spindle Orientation" cycle. Marker M2127 is set during
every spindle orientation.
Probing feed rate and spindle speed
For tool measurement of a non-rotating tool the probing feed rate is taken from MP6520.
For tool measurement of a rotating tool the probing feed rate and the spindle speed are
automatically calculated by the TNC. The rotational speed is calculated from the maximum
permissible surface cutting speed (MP6570) and the tool radius from the tool table. The rotational
speed is limited to a maximum of 1000 rpm.
MP6570
n =
−
π
× × × 3
2 r 10
4-192 TNC 407/TNC 415/TNC 425
n = Rotational speed [rev./min]
MP6570 = Maximum permissible surface speed of the tool edge
[m/min]
r = Tool radius [mm]
9 Touch probe 01.98