130-019B

Access Complete Alarm Information

Press MOD key, select 'System Messages' or 'Error Messages', and locate alarm 130-019B to view the complete text where %1 will be replaced with the specific axis (X, Y, Z, etc.) and detailed fault description.

Take a photo or write down the complete alarm text as it contains critical diagnostic information that the generic alarm code doesn't reveal.

Check Encoder Diagnostics Display

Navigate to Positioning > Test > Encoder or use the CC/UMC diagnostics screen (depending on control generation). Check signal amplitude for 1Vpp encoders (should be 0.8-1.2Vpp) or EnDat error counters and status bits for absolute encoders.

For EnDat encoders, error counters incrementing rapidly indicate communication issues, while static errors may indicate one-time events during power-up.

Inspect Encoder Cable and Connections

Power off the machine and inspect the encoder cable from the reading head to the CC/UMC module. Check for pinched cables, damaged shields, proper connector seating at both ends, and verify shield continuity to ground at the control cabinet end only.

Always power down the machine before disconnecting encoder cables to prevent damage to the CC module encoder inputs.

Verify Encoder Reading Head Gap

Using feeler gauges, check the gap between the encoder reading head and scale. For LIP/LIF linear encoders, maintain 0.5-1.0mm gap. For LIC enclosed encoders, verify proper installation per Heidenhain encoder manual. Clean the scale and reading head window with isopropyl alcohol.

Contamination from coolant, chips, or dust is the most common cause of gradual encoder signal degradation on machine tools.

Check Following Error in Real-Time

In Manual Operating Mode, select Positioning menu and observe the 'Lag' or 'Following Error' display for the affected axis during manual movement. Compare this value against MP140 (position monitoring window during motion).

Normal following error should be less than 50% of the monitoring window value during constant velocity moves.

Review Position Monitoring Parameters

Access machine parameters (MOD > Machine Parameters requires password). Check MP140 (monitoring window moving), MP141 (monitoring window stationary), and MP142 (time delay) for the affected axis. Verify values are appropriate for axis dynamics.

Do not increase monitoring window values to mask mechanical problems without identifying the root cause of excessive following error.

Test Axis Movement for Binding

In Manual mode, jog the affected axis at various speeds (10%, 50%, 100% rapid). Listen for unusual sounds, feel for hesitation, and observe if following error increases at specific positions, indicating mechanical binding or way problems.

Following error that increases linearly with velocity indicates servo tuning issues; following error that spikes at specific positions indicates mechanical problems.

Check Servo Tuning Parameters

Review axis servo parameters MP800-MP830 series (specific range depends on control version). Verify Kv factor (proportional gain), acceleration limits, and velocity feedforward are properly tuned for the machine's mechanical characteristics.

Heidenhain service software TCPM or iTNC service displays can show real-time following error graphs during test moves for detailed analysis.

Access EnDat Diagnostics

Navigate to the CC/UMC diagnostics display (access method varies by control: Setup > CC Diagnostics or MOD > System > CC Status). View EnDat error counters, status word, and communication quality indicators for the affected axis encoder.

EnDat 2.2 encoders provide detailed diagnostic information including temperature, internal errors, and signal quality metrics accessible through CC diagnostics.