Citizen CL-S621 Ribbon Wrinkling/Jamming Diagnostic... | terminalfaults.org

Technical Background:

Ribbon printers rely on precise synchronization between the print head, ribbon supply spool, and take-up spool. Incorrect tension, worn gears, or sensor misalignment can disrupt this synchronization, leading to ribbon wrinkling and jamming. Static discharge (ESD), especially in dry environments, can also interfere with sensor readings. Voltage fluctuations can affect motor control precision, impacting ribbon feed.

Symptoms:

The Citizen CL-S621 printer exhibits ribbon wrinkling and jamming after approximately 50 labels are printed. This indicates a potential feed or tension issue.

Possible Causes:

Incorrect ribbon loading: The ribbon may not be threaded correctly through the print head and guide rollers.
Ribbon tension imbalance: The supply and take-up spools may have unequal tension, causing the ribbon to slacken and wrinkle.
Sensor obstruction: Dust or debris on the ribbon sensor(s) can lead to incorrect ribbon feed commands.
Print head pressure: Excessive or uneven print head pressure can increase friction and cause the ribbon to wrinkle.
Ribbon core damage: Deformed or damaged ribbon cores can cause uneven ribbon winding and tension.
Environmental factors: Low humidity can increase static electricity, affecting sensor performance.

Solution:

1

Safe Handling: Disconnect the power cable from the printer before proceeding.
2

Re-load Ribbon: Carefully remove the ribbon and re-load it according to the manufacturer's instructions, ensuring it's properly seated and threaded.
3

Clean Sensors: Use a dry, lint-free cloth or compressed air to gently clean the ribbon sensor(s). Refer to the printer's manual for sensor locations.
4

Adjust Ribbon Tension (if adjustable): Consult the printer's manual for instructions on adjusting the ribbon tension settings. Make small adjustments and test the printer after each adjustment.
5

Inspect Ribbon Path: Check the ribbon path for any obstructions, such as labels or debris, and remove them.
6

Test with New Ribbon: Try a new ribbon roll to rule out any defects in the existing ribbon.
7

Power Cycle: Reconnect the power cable and power on the printer to reset the system.

Safety Warning:

Always disconnect the power supply before performing any maintenance. Avoid using liquids or solvents to clean the printer's interior. Be cautious of static electricity, especially in dry environments; ground yourself before touching any internal components. Do not attempt to open the printer's casing as this may trigger anti-tamper mechanisms and void the warranty. Do not use excessive force when loading or adjusting the ribbon.

Prevention:

Regularly clean the printer's interior with a dry, lint-free cloth. Ensure proper ribbon loading techniques are followed. Control humidity levels in the environment, especially during dry seasons, to minimize static electricity. Avoid placing the printer near sources of electromagnetic interference (EMI). Inspect ribbon cartridges for damage before use.

Expert Tip:

Some Citizen printers have a self-test function that includes ribbon feed calibration. Consult the printer's manual for instructions on accessing and running this self-test. If the problem persists after cleaning sensors, a faint smudge on a sensor can be detected using a strong LED flashlight at an oblique angle.

Frequently Asked Questions

•What is the recommended cleaning schedule for the ribbon sensors?

The ribbon sensors should be cleaned at least monthly, or more frequently if the printer is used in a dusty or dirty environment.

•What type of cleaning cloth is recommended for cleaning the sensors?

A dry, lint-free, anti-static cloth is recommended. Avoid using cloths that may leave fibers or residue.

•Where can I find the ribbon loading instructions for the CL-S621?

The ribbon loading instructions are located in the Citizen CL-S621 user manual, which can be downloaded from the Citizen website.

Citizen CL-S621 Ribbon Wrinkling/Jamming Diagnostic Report

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the recommended cleaning schedule for the ribbon sensors?

•What type of cleaning cloth is recommended for cleaning the sensors?

•Where can I find the ribbon loading instructions for the CL-S621?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: