How to Calibrate Bi-Directional Printing on Your DTF Printer

Watch the video walkthrough: DTF Printer Calibration Guide on YouTube

If your DTF prints look horizontally blurred or show a ghosting effect, your bi-directional calibration is likely off. This is one of the most common calibration issues we see at 1ClickPrint tech support, and the good news is it only takes a minute or two to fix.

What Is Bi-Directional Printing?

Your printer lays down ink as the print head moves in both directions — left to right and right to left. This is called bi-directional printing, and it effectively doubles your print speed. However, if the left-to-right pass and the right-to-left pass aren’t perfectly aligned, the result is a horizontal blur or ghosting effect on your prints.

Before You Start

Before running any calibration, make sure you’ve covered these basics:

• Warm up your printer. Temperature affects calibration. If your machine has been sitting in a cold environment, turn it on and let it warm up before calibrating. Ideally, do a test print first to bring the machine up to operating temperature. Calibrating a cold machine will give you inaccurate results.
• Run a nozzle check. Print a nozzle check pattern to confirm your print heads are in good condition. The lines should be sharp and the pattern undistorted. Minor gaps may clear after a soak or some printing, but significant issues should be addressed first.
• Check your film tension. The film roll should spin with just a little resistance when turned by hand. It shouldn’t be sagging at the back, but it also shouldn’t be so tight that the printer struggles to feed it.

Step-by-Step: Horizontal Bi-Directional Calibration

1. In your printer manager software, navigate to the Calibrate menu and select Horizontal.
2. Click Print. The printer will produce a calibration test pattern.
3. Examine the output. You’ll see a series of vertical lines arranged around a centre point marked zero. The goal is for the lines at zero to form a single, solid, straight line.
4. If zero is not a solid line, look along the scale to find the number where the lines do align into a clean, straight line. Note whether it’s a positive or negative number.
5. In the software, adjust the value by that amount. For example, if +3 is the aligned line, add 3 to the current value. If –3 is correct, subtract 3 from the current value.

Important: This is not the number you set the value to — it’s the amount you change it by. If the current value is 120 and the test shows +3, set it to 123.

6. Click Save, then click Print again to produce a second test pattern.
7. Check the new output. The lines at zero should now be perfectly aligned into a solid straight line.
8. Once confirmed, save and exit.

Troubleshooting

If you’re still seeing ghosting after calibration:

• Ensure the machine was fully warmed up before calibrating.
• Re-run the nozzle check to rule out print head issues.
• Check that your film tension is correct — too tight or too loose can both cause problems.
• If the issue persists, get in touch with our tech support team.

Tip: If your working environment gets particularly cold overnight, it’s worth rechecking this calibration periodically, especially during winter months.