Camera Setup: random capture results

[gooddealonly]

I am a new LightBurn user. I am using Lightburn 1.4.000 on a Windows 11/64

I have no problem installing the camera.
The Camera Control view shows the dot circle pattern correctly.
The Lens Calibration Wizard also shows the dot circle pattern correctly. When I click on Next and then click Capture, I got different results at different times randomly It may be any one of the following:

1. Image 0 (1929 x 1080) Pattern not found.
2. A capture score of between 0.55 and 1 but never below 0.3
3. A capture score of 1000-80000 or some huge number

I have restarted LB, and reset the camera by unplugging it from the USB port.

What am I doing wrong? Help!

[Wyked (Chris Gallaher)]

When Calibrating a camera I always cover the entire work area with white card stock/paper and get scores below 0.3 every time.

[gooddealonly]

The test pattern is obviously on the screen in both Camera Control and Lens Califbration Wizard but LB say not found.

[JTR (Tyler Raps)]

It looks like you’re positioning the calibration pattern much too close to the camera. For each capture position, it should take up roughly 1/9th of your camera’s field of view, as shown in the reference photo in the wizard.

Here are some additional tips on the lens calibration (and alignment) process:

Tips for calibrating / aligning the camera

These are the most common reasons for difficulty with camera calibration: The camera doesn’t need to be on the machine for the lens calibration - It’s ONLY the lens and pattern that matter for this part, and the pattern can be scaled up. If you do it on the machine, if you have a honeycomb bed, cover it (bedsheet, paper, wood, etc) - the pattern gets misinterpreted as more circles and confuses the software. The printed circle pattern has to be as flat as possible . Glue it to wood or f…

And a video guide:

LightBurn Camera Lens Calibration

[gooddealonly]

The calibration pattern is not too close to the camera. The dot pattern was too large.
My problem was I printed the dot pattern on a full 8.5" x 11" letter-size paper. After I watched the video, I printed the dot pattern at half-page letter size. Everything started working.

Thanks. Problem resolved.