Calibrate the Zebra ZT610 and ZT620: sensors and skipped labels

Calibration teaches the ZT610 or ZT620 where each label starts and whether a ribbon is loaded. This guide covers the sensor settings, manual and automatic calibration, and what to check when labels still skip or drift. The steps are the same on both models.

When to calibrate

• After you change to labels or ribbon of a different size or type.
• When the printer skips labels or prints across the gap.
• When the print drifts up or down on the label (vertical drift).
• When the printer shows Media Out or Ribbon Out although labels and ribbon are loaded.
• When labels with gaps are treated as continuous labels.

Check the label type and sensor type

The printer can only find the labels if it knows what to look for. Check two settings on the touch display:

• Print › Print Quality › Label Type: Gap/Notch for labels with gaps, notches or holes, Mark for labels with black marks on the back, Continuous for media without any marks.
• Print › Sensors › Sensor Type: TRANSMISSIVE for gaps, notches and holes; REFLECTIVE for black marks.

Zebra's media specifications for gaps are 2–4 mm, 3 mm preferred. Black marks must sit within 1 mm of the inside edge of the media, be 3–11 mm long and more than 11 mm wide. Media outside these values may not calibrate reliably.

Position the media sensor

The transmissive sensor has a lower part that sends a green light and an upper part that receives it. The labels run between them. Zebra says to move the sensor only when the printer cannot find the top of the labels and reports Media Out with labels loaded. With notched or punched labels, the sensor must sit directly under the notch or hole.

1. Open the media door and remove the ribbon, so you can see the media path clearly.
2. With labels loaded, find the green light shining up from the lower part of the media sensor.
3. If needed, turn the gold transmissive sensor adjustment wheel until the light lines up with the notch or hole.
4. Reload the ribbon and close the printhead.

Zebra describes no adjustment for the reflective sensor, so use black-mark media that meets the position given above. Also check that the labels touch the inside back wall of the sensor and that the media guide touches the label edge.

Run a manual calibration

Run this after loading new media, or whenever a symptom above appears.

1. Load labels and, for thermal transfer, ribbon. Close the printhead.
2. On the Home screen, touch Menu, then Print › Sensors › Manual Calibration, then touch Start Calibration.
3. Follow every on-screen step exactly as shown, and touch Next to go to the next prompt.
4. To stop at any step, press and hold CANCEL.
5. When calibration is complete, press PAUSE to leave pause mode and start printing.

Set automatic calibration

The printer can calibrate by itself when you switch it on or close the printhead. Set System › Settings › Power Up Action and System › Settings › Head Close Action to one of these values:

If you often switch between label types, CALIBRATE as Head Close Action saves a manual calibration after each change.

Fix the label position

• Labels stop short of or past the tear bar: adjust Print › Image Adjust › Tear Line Offset (−120 to +120). Lower values move the labels into the printer, higher values move them out.
• Still skipping after calibration: clean the media sensor (blow it clean with air), check the sensor position and the label type, and make sure the label format in your software matches the label size.
• Auto calibration fails: reload media and ribbon, then run a manual calibration. Zebra lists dirty or wrongly positioned sensors and a wrong label type as the usual causes.

For alerts and lights, see ZT610 and ZT620 troubleshooting. First-time loading is in the ZT610 and ZT620 setup guide. More guides: ZT610 and ZT620.