300400

Check Axis Movement Manually

Set machine to JOG mode via HMI > Machine > JOG and manually move axis at low feed rate (F10-50) to identify binding points.

Ensure all safety circuits are active and E-STOP is accessible before manual movement.

Inspect Mechanical Components

Check ballscrew, linear guides, and coupling for debris, damage, or excessive wear. Verify proper lubrication of all moving components.

Listen for unusual noises during movement - grinding indicates bearing issues, clicking suggests coupling problems.

Verify Backlash Compensation

Check MD32450 (BACKLASH) parameter in HMI > Commissioning > Drive Data > Axis Specific to ensure proper backlash compensation is configured.

Excessive backlash compensation can cause oscillation and position errors.

Check Position Control Gain

Navigate to HMI > Commissioning > Drive Data > Position Control and verify MD32200 (POSCTRL_GAIN) matches motor and mechanical specifications.

Typical values range from 0.5-5.0 depending on system stiffness - higher values for stiffer systems.

Verify Following Error Window

Check MD32810 (FOLLOWING_ERR_WINDOW) in Drive Data menu - should be 2-3x normal following error during rapid moves.

Monitor actual following error via HMI > Diagnostics > Drive > Actual Values during test moves.

Review Speed Control Parameters

Verify MD32300 (SPEED_CTRL_GAIN) and MD32310 (SPEED_CTRL_INT_TIME) are properly tuned for the connected motor and load inertia.

Use SINUMERIK Optimize function for automatic servo tuning if available on your control version.

Check Encoder Signals

Navigate to HMI > Diagnostics > Drive > Encoder and monitor encoder signals during axis movement for dropouts or noise.

Look for consistent signal amplitude and proper quadrature relationship between A and B channels.

Verify Cable Connections

Inspect encoder cable connections at motor, drive, and control cabinet. Check for proper shielding and separation from power cables.

Power down system before checking connections to prevent damage to encoder circuits.

Test Reference Point Return

Execute reference point return via HMI > Machine > Reference Point and observe for consistent positioning and alarm-free completion.

Inconsistent reference point positions indicate encoder or mechanical issues.

Review Load Calculations

Verify actual load inertia against motor specifications and check MD32000 (MAX_AX_ACCEL) and MD32010 (MAX_AX_DECEL) settings in Drive Data.

Load inertia should not exceed 10:1 ratio to motor rotor inertia for optimal performance.

Monitor Drive Current

Use HMI > Diagnostics > Drive > Actual Values to monitor motor current during moves - should not exceed 80% of rated current continuously.

Peak currents during acceleration indicate proper sizing, but sustained high current suggests overload.

Adjust Acceleration Limits

Reduce MD32000 (MAX_AX_ACCEL) by 20-30% and test axis movement to see if alarm clears, then gradually increase to find optimal setting.

Balance acceleration capability with positioning accuracy requirements for your application.