How to Calibrate the White Layer Position on Your DTF Printer

Watch the video walkthrough: DTF Printer Calibration Guide on YouTube

If the white under-base layer is poking out from the edges of your colour print, your white layer position calibration needs adjusting. DTF prints are made up of two layers — the CMYK colour layer goes down first, and then a separate print head lays a white layer on top. For perfect prints, the printer needs to know exactly how far apart these two print heads are.

There are two calibrations to complete here: vertical (the distance between heads along the direction of film travel) and horizontal (the side-to-side alignment). We’ll cover both.

Before You Start

As with any calibration:

• Warm up your printer before calibrating. A cold machine will produce inaccurate results. Do a test print or let it run for a few minutes first.
• Run a nozzle check to confirm the print heads are functioning properly.
• Check film tension. The roll should spin with slight resistance by hand — not sagging, not overly tight.

Part 1: Vertical White Layer Calibration

This calibration aligns the white layer with the colour layer along the vertical axis (the direction the film feeds through the printer).

Step-by-Step

1. In your printer manager software, go to Calibrate and select Vertical.
2. Click Print. The printer will produce a test pattern.
3. Examine the output. You’ll see white lines and black lines. At zero, the white lines should sit directly in line with the black lines. If they don’t, look along the scale to find the number where they do align.
4. Adjust the value in the software by the amount shown. For example, if –5 is the correct alignment, subtract 5 from the current value. If it were +5, you’d add 5.
5. Click Save, then Print again to verify.
6. Check the new output. At zero, the white and black lines should now be perfectly aligned.
7. Save and move on to the horizontal calibration.

Part 2: Horizontal White Layer Calibration

This calibration aligns the white layer with the colour layer along the horizontal axis (side to side). Because your printer prints bi-directionally, you’ll need to calibrate both the left pass and the right pass separately. The values are often similar but not always identical.

Step-by-Step

1. In your printer manager software, go to Calibrate and select Horizontal Head.
2. Click Print to Left. The printer will produce a test pattern for the leftward pass.
3. Click Print to Right. The printer will produce a second test pattern for the rightward pass. You can do both prints one after the other.
4. Examine the left-pass output. As with bi-directional calibration, you’re looking for the number where the lines align into a solid straight line at zero. Note the value.
5. Examine the right-pass output in the same way. Note its value.
6. Adjust both values in the software. Add the left-pass number to the left value, and the right-pass number to the right value.

Tip: It’s normal for the left and right values to differ by a small amount — they might be the same, or one or two apart. Don’t worry if they’re not identical.

7. Click Save, then print both left and right test patterns again.
8. Verify that zero is now perfectly aligned on both outputs.
9. Save and exit.

Troubleshooting

If the white layer is still showing at the edges of your prints after calibration:

• Double-check that the machine was properly warmed up.
• Re-run both vertical and horizontal calibrations — sometimes adjusting one reveals that the other needs a small tweak.
• Ensure the film tension is correct.
• If the problem continues, contact our tech support team for further assistance.