Question about Zebra QL 420 Plus Printer

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I have a big problem whit my zebra ql420+, dont take the position of paper correcto, just open and close header and the paper dont adjust whit the sensor and the continuos paper. Simply dont calibrate. Please helpme!!! thanks

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5 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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itdude4321
  • 13 Answers

SOURCE: Zebra S600 printer continues calibrating

The factory default settings for the S600 is to auto calibrate every time the printhead is closed and every time the power is cycled. If the media sensor is not positioned correctly for the media you are using the label size will not be detected during a calibration. You mentioned the media has no markings, doe sthe media have a space between the labels? If so, the media sensor may not see the gap in the labels adn therefor is not calibrating properly or not calibrating at all. Check the media sensor position. I have found that the media sensor must be at least 1" from the inner wall of the printer so it doesn't see the edge of the backing in oder to read the size of the labels.

Posted on Feb 02, 2008

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  • 35 Answers

SOURCE: Zebra 140xi II error

If you open the case there is a sensor that detects whether the head is opened or not that is connected to the open and close lever. Sometimes the tab that blocks the sensor when it is closed get out of alignment or comes loose or the sensor is jarred loose. Make sure the tab breaks the beam.

Posted on May 12, 2008

Joed911
  • 4338 Answers

SOURCE: how to adjust and align the printout downward

Here is a video which shows you how: (should be the same for your printer)

http://www.findinternettv.com/Video,item,554494454.aspx

Click on this link or copy and paste the complete link into your browser.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

Posted on Mar 03, 2009

Sakeninja1
  • 5 Answers

SOURCE: Zebra 105Se power on calibration

If this unit has the LCD screen you need to Press Setup. Then Press Next till you get to Media Power Up and set it to FEED. Next go to Head Close and set it to FEED also and then save settings. It will only shoot one label out instead of Calibrate. Which is needed when they install new lables if its the same type of label all the time really don't need to Calibrate every time you stick new labels in it.

Posted on Mar 25, 2009

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I have experienced similar issues between two zebras. I found that the driver was the issue. I recommend:
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  2. remove old driver and install new driver from Zebra's support website. https://www.zebra.com/us/en/support-downloads.html
  3. If you are still having issues after all that, I really must recommend contacting Zebra as your printer may be defective and may be under warranty for service or replacement.

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there is a possibility that you need to just the print head assembly, if when its at close position, the print head is far from the sensor.

With the print head is open, you will see 3 screw on the left, louse them and adjust all the print head mechanism, up and down some milliliters tie the screws again, close the printhead , try again and see if errors desapeer

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Include this command before the start of your ZPL code:
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If you open the case there is a sensor that detects whether the head is opened or not that is connected to the open and close lever. Sometimes the tab that blocks the sensor when it is closed get out of alignment or comes loose or the sensor is jarred loose. Make sure the tab breaks the beam.

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I have WiFi Zebra QL420. In my case a simple header label prints fine then the complex label (many fields, barcode, lines & boxes) gets stuck. Labels are in separate spol files. We have many other labels printing fine, just this one ALWAYS gets stuck.
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