Zebra ZT420 How Do Auto Calibration

Watch the video below.

Step-By-Step Instructions To Do Auto Calibration On The Zebra ZT420

Method 1: Auto Calibration from the Printer Menu (Recommended)

1. Power on the printer.
2. Press the MENU button.
3. Use the arrows to go to Settings → press OK.
4. Scroll to Printhead/Media (or Media Settings depending on firmware) → press OK.
5. Find Calibrate Media or Media Calibration.
6. Press OK to start calibration.

The printer will feed several labels as it automatically:

• Detects label length
• Detects gaps/notches/black marks
• Sets top-of-form calibration

Method 2: Quick Calibration (Fastest)

1. Load labels and close the printhead.
2. Hold FEED for 2–3 seconds, then release when the status indicator flashes once.
3. The printer feeds a few labels and calibrates.

This is “Quick Calibration” — useful when switching label types but not when switching between gap/notch/black-mark media.

Method 3: Full Manual Calibration (Factory Method)

1. Turn the printer OFF.
2. Hold PAUSE + FEED while powering ON.
3. Release buttons when the indicator lights flash.
4. The printer enters Manual Calibration Mode and feeds labels more extensively.

Use this if:

• Labels are skipping
• The printer fails to detect gaps
• After switching between gap and mark media

Tips for Best Results

• Make sure labels are loaded properly and the media sensor is positioned over the gap/mark.
• Clean the sensors if calibration keeps failing.
• If using black mark media, ensure the sensor is aligned to the black stripe.