err-305PX940e

Honeywell PX940e ERR-305 Error: Sensor Fix

The Honeywell PX940e ERR-305 error is a notification of media detection failure, usually caused by miscalibration of the label sensor. This error code prevents the head from identifying the gaps between labels, resulting in misaligned prints. To resolve the ERR-305 error on your Honeywell PX940e, clean the sensor and perform an auto-calibration.

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Common causes

  • 1Adhesive residue accumulation in sensor slot.
  • 2Switching to media with different opacity.
  • 3Incorrect sensor alignment with index marks.
  • 4Sensor photodiodes wear from heavy usage.

Solutions

Quick Diagnosis

ERR-305 appears after roll changes or when using adhesive materials that leave residue. If the printer doesn't stop exactly at the edge, the sensor is likely dirty.

Step-by-Step Solution

  1. Clean the sensor slot with a swab soaked in isopropyl alcohol.
  2. Navigate to the touchscreen menu and choose 'Media Auto-Calibration'.
  3. Manually adjust the sensor position to align with the mark or gap.
  4. Print a test label to confirm correct alignment.

Prevention and Maintenance

Make sensor cleaning part of your routine when loading a new roll. Avoid cheap labels that leave excessive paper dust or glue. Update firmware via the official portal for better sensor accuracy.

When to Call a Technician

If repeated calibration fails and the printer still doesn't recognize media, the photodiode might be damaged and requires hardware replacement.

Equipment Technical Data

  • Technology: Industrial thermal label printer
  • Speed/Performance: 350 mm/s
  • Connectivity: USB, Ethernet, RS232, Wi-Fi
  • Feeding Capacity: Rolls up to 213mm diameter
  • Compatible Consumable: PX940e ribbon and label family
  • Recommended Use: High-demand industrial environments
  • Official drivers / firmware

Steps to follow

  1. 1

    Sensor cleaning

    Clean the label sensor slot using a cotton swab and isopropyl alcohol.

  2. 2

    Manual calibration

    Go to the Settings menu and select Media Auto-Calibration.

  3. 3

    Verification

    Load the material properly ensuring the sensor is centered on the label gap.

Frequently asked questions

Error ERR-305 happens when the sensor fails to detect the gap between labels or the black mark, signaling a calibration issue.

Yes, it is necessary to continue printing labels without incorrect cut positions.

Use thermal transfer ribbons from the PX940e family and industrial-grade compatible labels.

Clean the printhead and sensor after every label roll change.