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Access Machine Parameters

Press MOD key, select 'Machine Parameters' from the TNC menu, navigate to spindle configuration section MP7160-MP7169.

Always backup current parameters before making changes using the data backup function.

Verify Spindle Name Parameters

Check MP7160 (spindle designation) and MP7161 (spindle type) are properly defined with valid spindle names matching your machine configuration.

Incorrect spindle parameters can cause machine damage - verify with machine documentation.

Reload Machine Parameters

If parameters are missing, restore from backup or re-enter correct values, then perform a control restart to activate changes.

Test Spindle Recognition

Execute a simple M3 S1000 command in MDI mode to verify the TNC now recognizes the spindle designation.

Review Active NC Program

Open the current NC program and examine all spindle-related commands (M3, M4, S) for incorrect spindle designations or syntax errors.

Use the TNC search function (GOTO) to quickly locate all spindle commands in large programs.

Compare with Machine Configuration

Cross-reference spindle names in the program with the configured names in MP7160, ensuring exact spelling and case sensitivity match.

Spindle names are case-sensitive in Heidenhain TNC systems.

Correct Program Syntax

Edit the NC program to use the correct spindle designation as defined in machine parameters, save the corrected program.

Validate Program

Run program check (Test Run mode) to verify all spindle commands are now properly recognized by the TNC.

Check PLC Status

Access PLC diagnostics through MOD menu, verify PLC is running without errors and spindle interface modules are active.

Look for PLC markers related to spindle ready signals (typically M4xxx series markers).

Examine Spindle Interface Signals

In PLC diagnostics, check input/output signals from spindle drive to ensure proper communication of spindle identification data.

Restart PLC Program

Perform PLC restart from the diagnostics menu to reinitialize spindle communication interfaces.

PLC restart will interrupt all machine operations - ensure machine is in safe state.

Verify Spindle Communication

Monitor PLC markers and I/O status while attempting spindle commands to confirm proper data exchange.

Check Cable Connections

Inspect all cables between TNC control and spindle drive, including encoder feedback cables and communication bus connections.

Power down machine before checking electrical connections to prevent shock hazard.

Verify Drive Status LEDs

Examine spindle drive status indicators for communication errors, fault conditions, or loss of control signal.

Test Communication Bus

Use TNC diagnostics to test communication bus integrity and verify spindle drive is responding to control commands.

Power Cycle System

Perform complete system power cycle (control and drives) to reset communication interfaces and re-establish proper connections.