I had to replace the roller that the printhead prints against. Now, each time a label is printed, a blank label is fed out. I Called Zebra and they calibrated it, but offered no solution to my blank label problem.
I would say the roller isn't the problem. I had the same problem on many Zebra printers, but often the calibration helped. Then it could do, when printing
task label is for larger/longer than the label size is set in the printer system
(conflict of software with printer settings after calibration). It could be set too down to bottom in Y axis. Or
it could be in the software settings - as action after print - not sure. Try to open the printer queue while the label is printed and check if the label has proper number of pages or there's 1 page more. If it is the right number - then the problem is on printer side (recalibrate, reflash it). If the number is about 1 higher, the problem is with settings of the label size (barcode software, printer settings) or action after print on PC side.
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Do the labels come out right when you print locally? That is the first thing to see. Serial devices over a network are tricky. Baud rate and what to do with CR LF, stop bits, parity etc. need to be right.
Do you use adhesive labels? It looks like the printer is unable to make the difference betwen the labels. Verify that the printer it's not set on Continuous mode for the media type. Verify if there is any label (or pice of label) stiked on the upper media sensor (gap sensor). You can locate the upper media sensor using the User Manual (page 74). There is an User Manual available for download from Zebra website. You will find there precious information. The manual is very explicit and you will learn how to maintain your printer and how to troubleshoot some common errors. Clean your printer, assure to put the supplies on the right path, close the printhead and press Pause to enter in Ready state.
You can clean the sensor with an coton cloth dampened into isopropylic alcohol.
Do a calibration, this should fix the issue. Also make sure that the label stopper (silver peg on label holder) is pressed firmly against the labels. This will stop the labels from sliding around during a print, throwing off the calibration. Also check to make sure the sensors are free of any dust.
I think the 105 has an adjustment on the printhead. There are left and right hand adjusters just above the printhead. It sounds as if the right hand one does not have enough pressure on it, try increasing the RH one and see the effect on the print.
Thermal printers don't have any 'color' of their own; the 'printed' text/numbers are actually only areas subjected to heat from the printhead which exposes the color of tiny beads of ink that are on the paper itself by melting them.
Use a fingernail to 'score' the paper and you will see it change color just as happens in the printer.
Clean your platen roller. It's the white rubber roller (that turns and pulls your labels through your printer) located under your printhead. When this gets slick it causes your labels to slip while printing. You should use rubbing alcohol to clean it. Your computer guys may also have some cleaning wipes in a foil packet that you can use.
1. Move the pressure arm further towards the outside of the printhead. Adjust if needed using only the minimum pressure required in order to achieve uniform print quality.
2. Inspect the printhead to ensure it has properly engaged the alignment pins. I have had after-market printheads that did not line up correctly and required "surgery" to make them properly seat on the mounting pins.
3. Check for worn platen roller bearings. If they're are sufficiently worn, one side of the platen roller will be slightly lower than the other.
4. Consider replacing the platen roller. They do wear out and require replacement. Zebra part number 40038M IIRC.
5. Check the printhead parallelism adjustment. The procedure is in the maintenance manual.