Once, the customer reported that it was also the product of Glassine. The blue base paper had no problem on the thermal printer but the white base paper had the problem of misalignment. The main manifestation is that after printing a few sheets, the printing position gradually shifts forward or backward.
Failure analysis:
Thermal printers use a sensor to scan the distance between the labels to control the paper feed. The light intensity of the sensor can be adjusted. The blue backing paper and the white backing paper have different light transmittances. The customer's printer used blue backing paper to print, and the light intensity of the photosensitive head was adjusted higher. After replacing the label with white backing paper, the step scan was unstable because the white backing paper had higher light transmittance than the blue backing paper. In order to confirm this judgment, let the customer cover the photoreceptor with a small piece of white paper, which artificially reduces the light intensity of the photoreceptor. On the machine print labels print step is very stable.
solution:
The thermal intensity of the thermal head of the thermal printer is adjustable. When using a material with a different color from the previous backing paper, if the step scan is unstable, you can try to adjust the light intensity of the photosensitive head to solve this problem.
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Ningbo Vesta Leisure Products Co., Ltd. , http://www.vesta-leisure.com