Hi, while using Zebra printer model Gk420t, I faced a problem which is the gap between each label is 2 labels space. The label i am using is 4.7cm width x 1.3 cm height, my problem is when i print more then one label, gap between each label takes 2 label space which mean between my 2 printed label present 2 blank label. How can i solve this issue to make the label is printed continuesly without blank label occured? Is this because of my printer setting?

SOURCE: Intermec PC4 label printer

Your printer is not sensing the gap between two labels.Please try calibrating the printer for the gap.
Switch ON the printer while holding FEED key down, on printer start feeding label realese the FEED Key.
Printer will stop feeding paper after printing SELF TEST, Once again press FEED key for 3 seconds. Printer will enter into normal Mode.
Check now.

SOURCE: Printer = Zebra TLP 2844-Z Problem = will not calibrate

just switch off the printer ,and then hold the green button power on the printer now and wait upto 4 bliknks of green led then remove the fingers.now printer will calibrate the label..

if still the problem exist .check the notch in the ribbon core.an adjust the spring tenson of rippon supply and take of roolers in printer

SOURCE: Zebra 105SL label issues

I am surprised that you are using that sequence of buttons to solve this problem. I am pretty sure that they want you to go into the "Media Sensor Calibration" setup in the config menu. It is a bit more complicated than what you have described. I also believe that the size of the gap on two of your labels might be out of tolerance (they are usually 1/8" gaps between the labels). The black marks are a problem for the transmissive sensors. You may need to move the transmissive media gap sensor (remember it has two parts: upper and lower). I would usually setup mine for a place beyond the black mark so that you are looking at just the white paper.

To start out:
1. Load the backing of a 6" strip of media (no label attached).
2. Remove a ribbon (if you usually use one).
3. Close the printhead.
4. Press SETUP/EXIT and then NEXT/SAVE until "Media and Ribbon Calibrate" appears.
5. Press "+" to start the calibration procedure. You should see the "Load Backing" in the LCD Display. You already have the backing loaded so continue to the next step.
6. Press "+" to answer the message and the next screen should say, "Remove Ribbon". You have also removed the ribbon.
7. Press the "+" to continue. You should see the screen say, "Calibrating Please Wait". After the sensors are setup by the machine a new screen should appear, "Reload All".
8. Open the printhead, and move the labels until they are loaded correctly to print. Smooth out the ribbon and load it correctly.
9. Withe media and ribbon now loaded, press "+" to continue and the machine should say, "Media and Ribbon Calibrate".
10. Press the Setup/Exit button once. It should say, "Save Changes Permanent". Press Next/Save to finish the process.
11. Do a normal calibration of your stock and print a label.

You are done. The machine will run for the labels you have setup the sensors for. Unfortunately, you must do this for each of the media types. To automate this, you could run a Configuration listing, capture the settings you just created for each type of label. Take these to a programmer to have them send the setup to the machine before the job. This is beyond the scope of this type support to really help you.

SOURCE: the Zebra 2443 printer is feeding out 13 to 14

It sounds like the printer is not calibrated. This procedure is in the users guide. Make sure both labels and ribbon are loaded correctly and then perform this procedure. If you do not have the manual or still have issues, email me at hilster1968@gmail.com for the procedure.

SOURCE: I have a Zebra GK420t...it was printing fine until

It sounds like they are in backwards or on the wrong side of the thermal printhead.