Datalogic Gryphon Scanner: Laser Failure on Reflective... | terminalfaults.org

Technical Background:

Barcode scanners use a laser diode to project a beam of light onto a barcode. The reflected light is captured by a photodiode, which converts the light intensity into an electrical signal. This signal is then decoded to identify the barcode. Reflective surfaces can cause excessive light reflection, saturating the photodiode or creating interference patterns that the decoder cannot interpret. Voltage fluctuations can affect laser diode output power. Baud rate issues will cause transmission failures to the host system, but not specifically related to reflective surfaces.

Symptoms:

Datalogic Gryphon barcode scanner laser fails to read barcodes on reflective surfaces. Scanner functions normally on non-reflective surfaces. Reported 'glare issue'.

Possible Causes:

Excessive ambient light interfering with the scanner's photodiode.
Damaged or dirty scanner window affecting light transmission and reflection.
Laser diode degradation resulting in reduced laser power, exacerbated by reflective surfaces.
Scanner firmware or software malfunction affecting decoding algorithms for reflective surfaces.
Poor grounding of the scanner, increasing susceptibility to electromagnetic interference (EMI) from reflective surfaces.
Voltage fluctuations from the host system's USB or power supply.

Solution:

1

Clean the scanner window with a lint-free cloth and isopropyl alcohol. Ensure the scanner is disconnected from the power source during cleaning (Safe Handling).
2

Shield the scanner from direct sunlight or bright overhead lights to minimize ambient light interference.
3

Test the scanner on various barcode types and surface reflectivities to determine the extent of the issue.
4

Update the scanner firmware to the latest version from the Datalogic website. Consult the manual for instructions.
5

Verify the scanner's power source. If using USB power, try a different USB port or a powered USB hub. If using an external power adapter, ensure it is the correct voltage and amperage.
6

If possible, test the scanner with a different host system to rule out software or hardware conflicts on the original system.
7

Inspect the scanner cable for damage or loose connections. Replace the cable if necessary.

Safety Warning:

Disconnect the scanner from its power source (Safe Handling) before cleaning. Avoid using excessive force when cleaning the scanner window. Be mindful of static electricity (ESD) discharge, especially in dry environments. Ground yourself before handling the scanner.

Prevention:

Regularly clean the scanner window to prevent dust and debris buildup.,Avoid exposing the scanner to direct sunlight or extreme temperatures.,Use a scanner stand or holster to prevent accidental drops and cable strain.,Implement a scheduled firmware update process to ensure optimal performance.,Ensure proper grounding of the POS system to minimize EMI.,Check cables regularly for wear and tear.

Expert Tip:

Try adjusting the scanner's aiming angle. A slight change in angle can sometimes reduce glare and improve readability on reflective surfaces. Also, a small external ferrite choke on the USB cable close to the device could reduce electrical noise.

Frequently Asked Questions

•What firmware version is currently installed on the scanner?

Check the scanner's configuration settings or documentation to determine the installed firmware version.

•Are other scanners of the same model experiencing similar issues?

Gather information from other staff members or locations to determine if the problem is isolated or widespread.

•Has the scanner been dropped or subjected to any physical impact?

Inspect the scanner for any signs of physical damage, which could indicate a hardware problem.

Datalogic Gryphon Scanner: Laser Failure on Reflective Surfaces

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What firmware version is currently installed on the scanner?

•Are other scanners of the same model experiencing similar issues?

•Has the scanner been dropped or subjected to any physical impact?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: