280-0602

Access touch probe configuration

Press MOD key, enter code if required, navigate to Touch Probe Configuration or System Configuration > Touch Probes to view the current probe table (tchprobe.tp).

On iTNC 530 and TNC 620/640, the path is typically MOD > Settings > Touch Probe > Tool Touch Probe Configuration.

Verify probe table completeness

Check that the TT probe entry exists with probe number (typically probe 1 or 2), probe type (e.g., TT 140), and all geometry fields (center offset X/Y/Z, stylus radius, stylus length) are populated with numerical values, not empty or zero.

Do not modify probe geometry values unless you have accurate calibration data or plan to recalibrate immediately.

Restore or re-enter probe data

If entries are missing or corrupted, restore from a known good backup of tchprobe.tp from the TNC:\system\tchprobe.tp directory, or manually re-enter probe configuration data according to machine documentation.

Always maintain backup copies of tchprobe.tp after successful calibration, stored on external media or network location.

Recalibrate the TT probe

Execute the tool touch probe calibration cycle (typically CYCLING DEF 30 or via the Calibrate Tool Touch Probe menu option) to regenerate valid configuration data and verify probe functionality.

Ensure adequate clearance and proper setup gauge is in position before running calibration cycle.

Review MP7410 probe usage parameter

Press MOD key, navigate to Machine Parameters, locate MP7410 (Usage of touch probe for tool measurement). Verify it is set to the correct value: 0=no probe, 1=TT probe without infrared transmission, 2=TT with infrared, 3=laser measurement.

MP7410 must match your actual installed hardware. Most common setting is 1 or 2 for TT 130/140/160 systems.

Check MP7411-MP7415 geometry parameters

Verify MP7411 (TT probe center position X), MP7412 (Y position), MP7413 (Z position of touch point), MP7414 (stylus radius), and MP7415 (safety clearance height) contain valid non-zero numerical values appropriate to your machine geometry.

Incorrect position values can cause collisions. Only modify if you have accurate measured data or factory specifications.

Validate MP7416-MP7419 calibration data

Check MP7416 through MP7419 for calibration values and operating parameters. If any show zero or obviously incorrect values, the probe has not been properly calibrated or data has been lost.

These parameters are typically auto-populated during calibration cycles. Manual entry is rarely needed.

Reset and recalibrate if necessary

If parameter values are clearly incorrect and no backup is available, consult machine manufacturer documentation for default starting values, enter them, then perform complete TT probe calibration sequence to generate accurate parameters.

Record all existing parameter values before making changes, even if they appear incorrect, for reference and possible machine manufacturer support.

Identify installed probe hardware

Physically verify the model number on the installed TT probe unit (check label on probe body or mounting bracket). Common models include TT 130, TT 140, TT 160, and TT 449.

Take a photo of the label for documentation purposes and future reference.

Check configured probe type

In MOD > Touch Probe Configuration, verify the probe type selection matches the physical hardware. Look for explicit probe model designation in the configuration interface or tchprobe.tp table type field.

Do not arbitrarily change probe type selection hoping to clear the alarm - this can cause communication errors or damage.