Damaged print heads leaving lines through the barcode. Depending on which way you are printing the barcodes, ladder or picket fence, this may leave the barcode unreadable. For preference always print picket fence as one missing print head pixel does not affect the overall readability of the code.
Inferior paper. Using economy direct thermal paper on a high-throughput line is false economy as the print head cannot mark it as well as higher grade papers.
Inadequate printer cleaning. Not cleaned those print heads and rollers lately? A build up of dirt and adhesive on the rollers will affect the print very quickly.
Inappropriate 'cleaning'. If you really want to ruin your print, allow your operators to clean your £300 print heads by scraping them with a screwdriver. It might be quicker than using a cotton swab and the proper cleaner but it is not quite as effective.
Clean Start. The convenient way to maintain your printheads and print quality.
These are just a few reasons why it can all go wrong, there are hundreds more. Still not sure what's going wrong?
Then why not ask us to check out your procedures? We offer initial free visits to review your production lines, and we will discuss the results with you then and there. Contact us for further details or to make an appointment.