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Zebra printer print text pattern is not clear how to deal?

Release Time:2020-07-29

Zebra printer encountered printing text pattern is not clear how to deal with the situation? Zebra printer print head is the most critical maintenance and replacement parts. Improper use or maintenance of the print head will affect the print quality and lead to insufficient black printing, too black, stripes, spots and other direct causes. Regular cleaning and replacement of necessary parts is the best way to ensure print quality and stable performance.

Zebra printer prints too light (not black enough)

If the black bar code is printed too lightly, it cannot form enough contrast with the light-colored areas. This will directly affect the scanning device to read the data.

There are several potential factors that cause printing to not be black enough:

• The print head exerts uneven or insufficient pressure on the material. The remedy is to adjust the pressure of the print head.

• The heat of the molten ribbon in the thermal label material or thermal transfer printing is not high enough. The heat setting is adjustable and should be adjusted to produce the desired contrast.

Zebra printer prints black

When the heat is set too high, it will be too black and make the bar code thicker, also known as bar code hyperplasia. This will cause the bar code to be out of specification because the required width/narrow ratio cannot be maintained and may become unreadable. Lowering the heat setting usually corrects the blackout.

Extra slashes appear in Zebra printer print

The presence of unwanted slashes or white streaks is a signal that the ribbon is not properly installed or sent. The ribbon should look smooth when inspected. Make sure that the label material is correctly installed within the wire and fed into the printer smoothly and evenly.

Spots or voids in the printed pattern of the Zebra printer

Usually dust, corrosion or defects on the print head will cause spots and voids. Defects prevent heat transfer, resulting in blind spots on the label. Dust or pitting can also stop or change the direction of heat or ribbon transport, causing voids or spots to appear that make the bar code unreadable. Regular cleaning can prevent dust and corrosion, but if there are defects, the print head needs to be replaced.

A wrinkled ribbon can also cause streaks or blind spots when printing:

• If the ribbon is not tight enough, it may cause wrinkles. Tighten the ribbon.

• If the ribbon continues to wrinkle, you may need to reduce the printing speed.

Other possible factors that may cause spots or voids are: improper coating or other defects on the top surface of the medium. Try a new roll of media and see if the problem persists.

Zebra printer printing edge blur

Barcode readers require clear, well-defined edges to recognize lines and spaces and properly decode symbols. One of the factors that makes thermal technology the best barcode printing technology is the ability to produce straight, sharp edges. Lowering the print speed can usually correct a looped or blurred edge. Blurred edges can also be caused by low quality label or ribbon material, or a mismatch between the ribbon and the media. Printing barcodes in the vertical (trapezoidal) direction may also cause blurred edges, so you should print in the horizontal (peg grid) direction as much as possible. Many of these quality problems can be monitored, such as normal visual label inspection, or printing a test label every time a barcode printer is started, a shift is changed, media or ribbon is changed. These preventive steps prevent problems and form the basis of an effective quality assurance program.