When a label printer prints one shipping label, skips the next, then prints again, it may not know where one label ends and the next begins. Incorrect size settings, sensor mode, roll loading and calibration are useful first checks.
Identify the exact symptom
- One blank label between each print: Check page length, gap detection and driver stock size.
- Several labels advance before printing: Check whether the sensor can detect the gap or reference mark.
- Printing starts too high or too low: Compare top-of-form offset, media calibration and document page dimensions.
Do not use the same remedy for all three symptoms. An application-level page-size mismatch can mimic a mechanical feeding problem.
Seven steps to fix skipped labels
1. Measure the printable label—not the roll
Measure width and height of one label. A nominal portrait 4 × 6 inch label measures approximately 101.6 × 152.4 mm. The liner width, roll diameter and gap are different measurements. Verify your media rather than guessing from the product listing.
2. Match the driver page size
Open operating-system printing preferences, choose the correct printer and set the actual label size. Then check the shipping application or PDF viewer for matching dimensions. A Letter-sized print job sent to 4 × 6 stock can cause extra feeds and unexpected output.
3. Select the appropriate sensing method
Gap sensing detects the space or translucent backing between die-cut labels. Black-mark sensing uses printed registration marks, typically on the liner. Continuous sensing assumes no regular label gaps. The correct setting depends on stock construction and printer capabilities.
4. Align the label roll carefully
Follow the printer’s threading guide and position adjustable side guides so the media advances straight without buckling or excessive friction. On models with movable sensors, ensure the sensor is positioned where it can see the required gap or mark.
5. Perform media calibration using the loaded roll
Use the documented calibration command, menu or button sequence for that model. A calibration routine may intentionally feed multiple labels to learn the repeat length—that is not necessarily a fault. Recalibrate when switching between substantially different stock types.
6. Test device output separately from PDF output
Print a built-in test pattern or configuration label. If it feeds correctly while PDFs still skip, compare the document page size, application scaling and driver preset. Our article on 4 × 6 shipping labels printing too small explains how PDF size and settings interact.
7. Inspect the sensor and use approved cleaning steps
Adhesive residue, label fragments and dust may interfere with optical detection. Power off the printer before maintenance and use the materials and method in its manual. Never force a sensor or put sharp tools into its slot.
Use the outcome to choose the next action
| Result | What to investigate |
|---|---|
| Native self-test skips | Media selection, roll path, sensor, calibration |
| Only one PDF or app skips | Page size, orientation, printer preset, scaling |
| New roll skips but old roll works | Gap or black-mark layout and media compatibility |
| Sensor never recognizes stock | Manufacturer diagnostics and possible professional service |
How to prevent skipped labels
Keep a note of the working media dimensions, stock-sensing type and driver preset. Test a sample before switching suppliers or opening a new label size. Avoid factory resets as the first step: they can remove network and other known-good settings.
Frequently asked questions
Why does my printer skip every other label?
A mismatch in label length or a misread gap is a reasonable starting hypothesis. Verify the actual stock, selected sensor type and calibration rather than replacing parts immediately.
Is it normal for calibration to feed several blank labels?
Yes, many printers feed stock during media calibration. Confirm the behavior in your printer’s own instructions.
Should I factory-reset the printer?
Only after you document current settings and simpler checks fail. A reset can erase useful configurations without fixing incompatible stock.
Editorial note: Terms for sensor settings and calibration menus differ by brand and firmware; this is a device-independent troubleshooting method.
Independent general troubleshooting information for shipping labels and thermal printers. Model-specific button sequences, cleaning supplies and service instructions can differ; consult your manufacturer's official documentation. Never alter a carrier-generated barcode.