230-01CC

Access Machine Parameter Menu

Press MOD key, select 'Machine Parameters' from the TNC menu, navigate to MP1020.x series parameters.

Ensure machine is in a safe state before modifying machine parameters

Check Encoder Input Assignments

Review MP1020.0 through MP1020.x for each axis, verify that each axis has a unique encoder input number assigned (typically 0, 1, 2, etc.).

Document current settings before making changes for easy rollback

Correct Duplicate Assignments

Assign unique encoder input numbers to each axis in MP1020.x, ensuring no two axes share the same input channel number.

Incorrect encoder assignments can cause axis movement errors

Restart Control and Test

Perform a control restart (CTRL+ALT+DEL), clear alarms, and verify axis functionality with careful manual movements.

Review Recent Hardware Changes

Check maintenance logs and verify any recent encoder cable connections, axis additions, or drive replacements that may have affected input assignments.

Verify Physical Encoder Connections

Trace encoder cables from each axis to the TNC control inputs, ensuring physical connections match the intended MP1020.x parameter assignments.

Use the TNC diagnostic screens to verify encoder signal quality on each input

Cross-Reference Electrical Schematics

Compare actual wiring with machine electrical drawings to identify any discrepancies between physical connections and parameter settings.

Update Machine Parameters

Modify MP1020.x parameters to match the actual physical encoder input connections, ensuring each axis reads from its dedicated encoder input.

Check Parameter Backup History

Access the TNC file management system and review recent parameter backup restorations in the machine parameter history logs.

Compare Current vs. Backup Parameters

Load the original machine-specific parameter backup and compare MP1020.x values with currently active parameters to identify discrepancies.

Always verify parameter compatibility before restoring backups from different machine configurations

Restore Correct Parameter Set

Load the appropriate parameter backup for this specific machine configuration, or manually correct the encoder input assignments in MP1020.x series.

Validate All Axis Functions

Perform comprehensive axis testing including reference point approach and position verification to ensure proper encoder feedback operation.

Review Machine Configuration Documentation

Check the original machine setup documentation and axis configuration specifications to determine correct encoder input assignments.

Verify Axis Count and Types

Confirm the total number of axes configured in MP1010 (Number of axes) matches the actual machine configuration and available encoder inputs.

Unused axes should be properly disabled to prevent configuration conflicts

Systematically Assign Encoder Inputs

Starting with X-axis as input 0, sequentially assign encoder inputs (Y=1, Z=2, etc.) in MP1020.x parameters according to machine axis layout.

Test Each Axis Individually

Manually jog each axis separately while monitoring position feedback to verify correct encoder input assignment and signal integrity.