Citizen CL-S621 Label Jam Diagnostic and Prevention -... | terminalfaults.org

Technical Background:

Label jams can occur due to excessive friction between the thick label stock and the printer's internal components. This increased friction requires a higher torque from the print motor. Insufficient torque, worn rollers, or incorrect media settings can contribute to slippage and jamming. Electrostatic discharge (ESD), particularly in low-humidity environments, can also affect label feed consistency. Voltage fluctuations can affect motor performance.

Symptoms:

The Citizen CL-S621 printer experiences paper jams specifically when printing on thick labels.

Possible Causes:

Incorrect media type selected in printer driver settings.
Worn or contaminated print rollers reducing friction.
Excessive label thickness exceeding printer specifications.
Printhead pressure settings not optimized for thick labels.
Electrostatic discharge (ESD) affecting label feed.
Label roll not properly aligned or tensioned.

Solution:

1

Verify that the correct media type (e.g., 'Thick Label') is selected in the printer driver settings on the connected computer.
2

Clean the print rollers with a lint-free cloth and isopropyl alcohol to remove any accumulated dust or adhesive residue. Allow to dry completely before use.
3

Confirm that the label thickness falls within the CL-S621's supported range as specified in the printer's documentation.
4

Adjust the printhead pressure setting. Increase pressure slightly for thicker labels but avoid over-tightening, which can cause damage.
5

Ensure the label roll is properly loaded and aligned according to the printer's manual, paying attention to tension.
6

If possible, test with a different brand of thick labels to rule out inconsistencies in the label stock itself.
7

Power cycle the printer. Unplug the power cable, wait 30 seconds, then plug it back in.

Safety Warning:

Always use Safe Handling (unplug the device) before performing any maintenance. Avoid operating the printer in areas with high static electricity. Do NOT open the printer casing, as this may void the warranty and damage sensitive components. Ensure the power cable is not strained or damaged.

Prevention:

Regular cleaning of print rollers and ensuring proper label alignment can significantly reduce the likelihood of paper jams. Check and update printer drivers. Monitor environmental humidity, especially during dry periods, to minimize static electricity.

Expert Tip:

Try adjusting the 'peel-off' function setting (if enabled) as it can sometimes interfere with thicker label feeding. Disable and test. Some label materials may have release liners that generate more static, consider an anti-static wipe on the label supply before printing.

Frequently Asked Questions

•What is the maximum label thickness supported by the Citizen CL-S621?

Refer to the CL-S621's technical specifications in the user manual or the manufacturer's website. It's often expressed in millimetres or mils.

•How do I access the printhead pressure settings on the CL-S621?

The printhead pressure settings are typically accessible through the printer driver on the connected computer or via the printer's control panel (if it has one). Consult the printer manual for specific instructions.

•What type of cleaning solution is recommended for the print rollers?

Isopropyl alcohol (90% or higher) is generally recommended. Ensure the alcohol evaporates completely before resuming printing.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the maximum label thickness supported by the Citizen CL-S621?

•How do I access the printhead pressure settings on the CL-S621?

•What type of cleaning solution is recommended for the print rollers?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: