Touch Probe Cycles: Automatic Tool Measurement
17.4 Measuring tool length (Cycle 31 or 481, DIN/ISO: G481)
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HEIDENHAIN | TNC 320 | User’s manual for cycle programming | 9/2016
Cycle parameters
Tool measurement mode (0-2)?: Specify whether
and how the determined data will be entered in the
tool table
0: The measured tool length is written to column L
of the tool table TOOL.T, and the tool compensation
is set to DL=0. If there is already a value stored in
TOOL.T, it will be overwritten.
1: The measured tool length is compared to the
tool length L from TOOL.T. It then calculates the
deviation from the stored value and enters it into
TOOL.T as the delta value DL. The deviation can
also be used for 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)
2: The measured tool length is compared to the
tool length L from TOOL.T. The TNC calculates the
deviation from the stored value and enters it in
Q parameter Q115. Nothing is entered under L or
DL in the tool table.
Parameter number for result?: Parameter
number in which the TNC saves the status of the
measurement result:
0.0: Tool is within tolerance
1.0: Tool is worn (LTOL exceeded)
2.0: Tool is broken (LBREAK exceeded). If you do not
wish to use the result of measurement within the
program, answer the dialog prompt with NO ENT.
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
Probe the teeth? 0=no/1=yes: Choose whether the
control is to measure the individual teeth (maximum
of 20 teeth)
Measuring a rotating tool for the first
time; old format
6 TOOL CALL 12 Z
7 TCH PROBE 31.0 CAL. TOOL LENGTH
8 TCH PROBE 31.1 CHECK: 0
9 TCH PROBE 31.2 HEIGHT: +120
10 TCH PROBE 31.3 PROBING THE
TEETH: 0
Inspecting a tool and measuring the
individual teeth and saving the status
in Q5; old format
6 TOOL CALL 12 Z
7 TCH PROBE 31.0 CAL. TOOL LENGTH
8 TCH PROBE 31.1 CHECK: 1 Q5
9 TCH PROBE 31.2 HEIGHT: +120
10 TCH PROBE 31.3 PROBING THE
TEETH: 1
NC blocks in new format
6 TOOL CALL 12 Z
7 TCH PROBE 481 CAL. TOOL LENGTH
Q340=1 ;CHECK
Q260=+100;CLEARANCE HEIGHT
Q341=1 ;PROBING THE TEETH
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