I calibrated the camera at the height of the honeycomb. I’m wondering what the function of the camera control - height setting is? Do I have to set it to 3 if I use 3 mm thick material, or 10 if I use 10 mm thick material?
The Width and Height fields increase or decrease the size of the Overlay in the X (Width) or Y (Height) dimension as referenced in our docs: Camera Control Window - LightBurn Documentation
You only can use material at the same height you calibrated it to. You should not calibrate to the honeycomb height, because you only can use paper then. If you usually use 3 or 4 mm material, calibrate to this height. You may not change the material height after calibration.
If you mean this setting?, I believe it is intended for machines with motorized Z-axis control, where the material thickness must be defined so the bed/laser head can automatically move into focus before the alignment pattern is burned.
If you don’t have this, then AFAIK entering a figure here would not have made any difference.
Because the height that matters is the height at which you ‘Capture Image’ for the alignment and select the pixel positions of the burned targets. This is the moment when the perspective and scaling for the alignment of your camera overlay image is set, so as @misken mentioned - you should calibrate the alignment with a material the same thickness as your usual material.
If the camera’s height relative to the material surface changes after this step, due to moving the bed or swapping in thicker material - the overlay will no longer line up correctly.
Should you need a very precise camera alignment while alternating between 3mm and 10mm material (and if you do not have a motorised bed so you can move it down to compensate for the thickness and keep the lens-to-surface distance the same), then you would need to duplicate and rename your device so you can calibrate the alignment individually for each material thickness - and switch between them as needed, for example:
1 Like
Thank you for this answer. Everything is clear to me now. This is what I was looking for.