HEIDENHAIN TNC 128 (77184x-02) - Manual (Page 484)

Touch probe cycles
20.7 Measure the tool length (Cycle 481, software option 17 Touch Probe
Functions software option 17)
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TNC 128 | User's Manual HEIDENHAIN Conversational Programming | 5/2014
Cycle parameters
Measure tool=0 / Check tool=1: Select whether
the tool is to be measured for the first time or
whether a tool that has already been measured is to
be inspected. If the tool is being measured for the
first time, the TNC overwrites the tool length L in
the central tool file TOOL.T by the delta value DL =
0. If you wish to inspect a tool, the TNC compares
the measured length with the tool length L that is
stored in TOOL.T. It then calculates the positive or
negative deviation from the stored value and enters
it into TOOL.T as the delta value DL. The deviation
can also be used for Q-parameter Q115. If the delta
value is greater than the permissible tool length
tolerance for wear or break detection, the TNC will
lock the tool (status L in TOOL.T).
Clearance height: Enter the position in the spindle
axis at which there is no danger of collision with
the workpiece or fixtures. The clearance height is
referenced to the active workpiece datum. If you
enter such a small clearance height that the tool
tip would lie below the level of the probe contact,
the TNC automatically positions the tool above
the level of the probe contact (safety zone from
safetyDistStylus). Input range -99999.9999 to
99999.9999
Cutter measurement? 0=No / 1=Yes: Choose
whether the control is to measure the individual
teeth (maximum of 20 teeth) NC blocks
6 TOOL CALL 12 Z
7 TCH PROBE 481 TOOL LENGTH
Q340=1 ;CHECK
Q260=+100 ;CLEARANCE HEIGHT
Q341=1 ;PROBING THE TEETH