How to reduce camera alignment pattern below 30% scale

LightBurn Software Questions
1

I’m running into an obtuse but simple problem, and would appreciate advice from anyone here. I’m trying to do camera alignment on a small subset of the total working area (150x150 mm) of my laser cutter. To do this, I have a camera with a large focal length to maximize the number of pixels / inch on my subset of the working area.

However, this means that the alignment pattern, even at 30% scale, is about 3x as large as my camera FoV! So I’m unable to move forward with camera alignment.

It seems like 30% is the minimum pattern scaling factor - the text box replaces anything smaller with 30%.

Is there any workaround for this?

Thank you!

2

How did you process exactly? You can’t calibrate the camera on a subset of the actual workspace. The camera always needs to see the homing position. The easiest way is to add the laser as another device, with a 150x150 workspace. Then everything will be adapted to that size. Also the calibration area.
You can’t calibrate 150x150 in the center of a 400x400 workspace, for example. See here for some details:

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