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1. The printhead in your printer might be scratched (evidenced by thin white streaks through your print). This is common, and the most likely cause. Printhead must be replaced. 2. Material might be stuck on your printhead (usually evidenced by wide white streak vertically through print). Printing surface of printhead can be cleaned with rubbing alcohol and cotton ball. 3. The ribbon might be wrinkling due to uneven tension, producing intermittent diagonal streaks in your print. This is somewhat common, but doesn't fit your description as well as 1 & 2 above. Mechanical adjustment and/or proper media loading solves ribbon wrinkles. 4. Poor pressure and/or printhead alignment. Evidenced by grainy, light or no print on one side or the other of the media. This is somewhat common, but doesn't fit your description as well as 1 & 2 above. Mechanical adjustment solves printhead pressure and alignment issues.
possible, need printhead replacement. Try to.
Turn printer off,
press pouse button,
turn printer on, still pressing pouse button for 10 seconds, and then relese the button. the printer will print the pouse test with barcode, check if coming with wihte lines across, if yes, change printhead.
check if the setting FORMAT CONVERT is with some numbers, please change for NONE.
This seting change the resolution from Printhead 200dpi or 300dpi or 150 dpi or none, none mins, if you have 200dpi printhead, print 200dpi resolution(small fonts). if have 300 dpi, print with 300 dpi resolution, if have 300 dpi(very small fonts) printhead, can print 150dpi(big fonts) if change this setting.
if ok, check the driver or your software.
You may have an element or two on the left side of the printhead that is worn out and not printing. The best way to see if elements are not working is to use the widest label you have and run the PAUSE test. Turn the printer off, press and hold the PAUSE key while you turn the printer on. Keep pressing for about 10 seconds and then you can let go. When the printer is finished starting up, a test pattern will print. Part of the pattern is a black box. Any elements that are not working will show as white vertical lines. The only way to correct is to replace the printhead.
The gaps run in the direction of the label feed? You have a bad printhead. Bad dots on the printhead prevent it from printing your format in the areas that you see the blank lines. There is no easy fix other than replacing the printhead. You can prevent (or actually prolong the time between failures) in the future by periodically cleaning your printhead. It's recommended that you clean the printhead after every roll of labels. The printhead is underneath the hinged assembly. Over time, ribbon or adhesive from the labels builds up and causes dots to go bad - creating the blank lines you see. Clean your new printhead with rubbing alcohol.
printer manufacturers has different standards depending from the varieties of model and brand of printers for example an epson printer model who is older version is not the same speed print with the recent model likewise with the other brand. Therefore calibration of labels is depending to the version of the printer you are using now.
As the label comes out of the printer...it sounds like your printing in picket fence mode (vertical bars). You most likely have 1 or more pixels out on the printhead...try cleaning first...if that fails... you will have to replace the printhead.
I have had this problem, but only when I used a label of a size that isn't within specification. Technically, this printer isn't specified for a label that is under 1 inch in height. I have a label that is only 0.2" in height and it will get sucked down inside the machine. I have asked the people who work on the manufacturing floor to advance the label two rows after a print job so that this doesn't happen. Then I ask them to cut the label off leaving the two rows sticking out. So, the next print job will start with the label stock sticking at least 1/2 " out of the printer.
I believe that also my printer doesn't tear the labels cleanly, so there is sometimes something that can catch right at the tear bar. You can probably fix that problem if it exists for you by adjusting the tear bar, or having a machinists slightly sharpen it. I hope this helps.