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How do I optimize the Mark/Gap Sensor on the Callisto?

Running the Sensor Optimize function can improve label registration and reduce skipping.

When Should I Optimize the Sensor?

If you are experiencing any of the following issues, optimizing the sensor may help:

  • Labels are skipping during printing
  • Print registration is inconsistent
  • The printer is having difficulty detecting gaps or black marks

How to Optimize the Sensor

  1. On the Callisto touchscreen, navigate to:
    Settings → Device Settings → Sensors → Mark/Gap Sensor
  2. Remove all media from the printer before starting the optimization process.
  3. Select Optimize on the right side of the screen.
  4. Choose the media type:
    • Gap (die-cut labels with gaps)
    • Black Mark media
  5. If using Gap media:
    • Peel the first label from the liner.
    • Load only the backing material into the printer when prompted.
  6. If using Black Mark media:
    • Follow the on-screen prompts. No label removal is required.
  7. Allow the printer to complete the optimization process.
  8. Review the recommended settings and select Accept to apply them.