Okuma Alarm A-1523 – Workpiece Weight Data File Not Found

What Does Alarm A1523 Mean?

The Okuma alarm A1523 indicates that the workpiece weight (MCS) data file specified by a system parameter cannot be found.

This means the control is attempting to apply load-related compensation data for the defined workpiece weight, but the referenced data set is missing, corrupted, or improperly configured.

To prevent unstable axis behavior, the control stops execution.

Technical Explanation

Okuma controls use MCS (Machine Coordinate System) and weight-related data files to adjust axis behavior depending on the mass of the workpiece.

Workpiece weight data typically affects:

  • Acceleration and deceleration characteristics

  • Servo response tuning

  • Vibration control

  • Load compensation values

If the parameter that selects the workpiece weight index references a data entry that does not exist in the axis or MCS file, Alarm A1523 is triggered.

This is a protective mechanism to avoid incorrect servo response under load.

When Does This Alarm Typically Appear?

Alarm A1523 may occur:

  • After restoring parameters from backup

  • After HDD or CF card replacement

  • Following software updates

  • When transferring machine configuration data

  • If weight-related parameters were modified manually

Possible Causes

  • Missing workpiece weight data file

  • Incorrect parameter index

  • Corrupted MCS data

  • Incomplete system restoration

  • Version mismatch after update

Recommended Troubleshooting Steps

  1. Verify the parameter that selects the workpiece weight data index.

  2. Confirm that the corresponding MCS data entry exists.

  3. Restore machine data from a verified backup.

  4. Check storage media integrity.

  5. Confirm compatibility between system software and machine configuration.

Important: Incorrect manual modification of weight compensation parameters may affect machining accuracy and servo stability.

Is This a Mechanical Problem?

No. Alarm A1523 is not caused by mechanical damage.

However, incorrect weight data may influence:

  • Positioning accuracy

  • Axis smoothness

  • Dynamic stability

Therefore, the control blocks operation until correct configuration is restored.

When Professional Service Is Recommended

If the alarm persists after verifying parameters and restoring data, professional diagnostics may be required.

Our CNC electronics specialists provide:

  • Okuma parameter verification

  • MCS and axis data recovery

  • Storage media replacement

  • Control diagnostics and repair

Request CNC RepairOur Spare Parts Shop
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