TSP143III Print Alignment Diagnostic and Solution -... | terminalfaults.org

Technical Background:

Print alignment relies on precise stepper motor control of the print head and paper feed. Firmware interprets commands and translates them into voltage signals for these motors. Deviations in voltage, signal attenuation due to cable faults, or firmware errors can disrupt alignment. ESD events can corrupt the volatile memory storing alignment parameters.

Symptoms:

Receipt prints exhibit misalignment. The text, barcodes, or graphics are skewed, cropped, or otherwise incorrectly positioned on the paper.

Possible Causes:

Firmware corruption affecting motor control.
Print head stepper motor malfunction or degradation.
Paper feed mechanism issues (e.g., obstructions, sensor errors).
Incorrect printer driver settings on the host system.
Communication errors between the host system and the printer due to cable issues (signal attenuation).
Electrostatic discharge (ESD) altering printer settings stored in volatile memory.

Solution:

1

Perform a printer self-test to isolate hardware issues. Hold the feed button while powering on. Examine the printout for consistent alignment. If the self-test is misaligned, the problem is internal.
2

Verify the correct printer driver is installed on the host system. Update the driver to the latest version from the Star Micronics website.
3

Check the printer driver settings for any manual alignment adjustments. Reset these settings to their default values.
4

Inspect the paper path for obstructions or debris. Clean the print head using a non-abrasive cloth and isopropyl alcohol.
5

Cycle the printer power. Disconnect the power cable for 30 seconds, then reconnect and power on.
6

Check the interface cable (USB/Serial/Ethernet) for damage or loose connections. Replace the cable if necessary.
7

If using a serial interface, verify that the baud rate and other communication parameters are correctly configured on both the printer and the host system.

Safety Warning:

Safe Handling: Disconnect the power cable before performing any maintenance. Do not use excessive force when cleaning the print head. Avoid water contact with electrical components. Ensure the power outlet is properly grounded. Avoid touching the print head immediately after printing, as it may be hot. Static electricity is more prevalent in dry environments. Use anti-static precautions.

Prevention:

Regularly clean the printer and paper path. Use high-quality thermal paper. Ensure proper cable management to prevent strain and damage. Minimize electrostatic discharge (ESD) by using anti-static mats and grounding straps, especially in dry environments. Periodically check for firmware updates from Star Micronics.

Expert Tip:

If alignment drifts over time, a potential cause is voltage fluctuations on the power line. Try plugging the printer into a different outlet or using a UPS (Uninterruptible Power Supply) to stabilize the voltage. Also, on rare occasions, using a different BRAND of receipt paper can resolve very subtle alignment issues due to minor paper thickness variations.

Frequently Asked Questions

•Does the self-test print correctly?

A correctly aligned self-test print indicates the issue is likely software or driver-related. A misaligned self-test suggests a hardware fault.

•What type of interface is used (USB, Serial, Ethernet)?

The interface type impacts the troubleshooting steps. Serial connections require baud rate verification. Ethernet connections require IP address confirmation.

•Has the printer been recently moved or subjected to physical shock?

Physical trauma can misalign internal components or damage the print head.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Does the self-test print correctly?

•What type of interface is used (USB, Serial, Ethernet)?

•Has the printer been recently moved or subjected to physical shock?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: