231-9410

Access encoder configuration

Navigate to MOD function, select 'Machine Parameters', then CfgAxisHardware section for the affected axis.

Always backup machine parameters before making changes

Verify posEncoderDist value

Check the posEncoderDist parameter against encoder nameplate specifications or technical documentation.

Incorrect values can cause positioning errors

Update parameter if needed

Correct the posEncoderDist value to match encoder specifications, then perform control restart.

Use encoder manufacturer's data sheet for exact values

Check encoder increment setting

In MOD mode, navigate to CfgAxisHardware and locate posEncoderIncr for the faulted axis.

Common values are 1nm, 5nm, 10nm, or 20nm depending on encoder type

Read encoder nameplate data

Verify the actual encoder resolution from the physical encoder label or EnDat memory readout.

Mismatched increment values cause scaling errors

Correct parameter value

Update posEncoderIncr to match the encoder's actual increment value and restart the control.

Use TNC's encoder diagnostic function to verify correct communication

Access encoder diagnostics

Use TNC's encoder diagnostic function in Test Run mode to read EnDat encoder memory contents.

Document all current encoder parameters before attempting repairs

Verify encoder communication

Check EnDat communication status and error counters in the diagnostic display.

Communication errors may indicate cable or encoder hardware issues

Reprogram encoder memory

If encoder supports it, reprogram the internal parameters using manufacturer's programming tool or TNC encoder setup function.

Some encoders require factory reprogramming if memory is severely corrupted

Verify encoder model match

Compare installed encoder part number with original specifications and machine documentation.

Different encoder models may have incompatible electrical interfaces

Update all encoder parameters

Modify both posEncoderDist and posEncoderIncr parameters in CfgAxisHardware to match new encoder specifications.

Also check other encoder-related parameters like signal levels and interface type

Perform encoder calibration

Execute encoder reference point procedure and verify proper scaling through test movements.

Use precision measurement tools to verify actual movement matches commanded distance