If we install it at the red arrow we have (without honeycomb which is about 3cm more): 110cm.
If we install it at the green arrow we have about: 88cm
According to lightburn help
Should I take the 8MP 120 or the 8MP 85 degree ?
What do you suggest so that we can use the wall area ? Does the camera have to be exactly at the middle ? For sure it will work with the 8MP 120 but I could get more precision with the 8mP 85 degree no if it suits … the risk is to have not the wall area right ?
That’s a good question, and you’re on the right track!
Here’s a statement of our camera dev:
Overhead is better than a low oblique angle for a couple of math reasons, and creates a more consistent overlay. I would not go beyond 45deg. 20deg is totally fine.
One of the rules is that you don’t want the camera to see much ‘above the horizon’. The bed is an infinite ground plane and the math is fine with that, but gets a little confused when you include sky points.
Mounting the camera exactly in the middle over the workbed is preferred, so that the lens correction needs to correct less. (I personally have my camera mounted at an extremely oblique angle, and it’s still accurate.)
The 8MP 120 degree requires a Minimum mounting height of 667mm in order to see the whole bed.
If you mount it at either 88, or 110cm, the camera will see more than the workarea and you’ll loose precious resolution due to cropping.
I’d recommend the narrower 85 degree angle and mount it at the green arrow.
You can try the red position. The only reason I’d consider this is, if the camera happens to be at a better angle to see the workarea when the lid is closed.
That’s correct. The lid needs to be open in order for the camera to see the full bed.
If it’s mounted at your red mark, the closed angle of the camera might be more useful to get an overview of that’s happening inside the laser.
Yes, that’s plenty of space. The LightBurn Camera mount is not much taller than 5cm.
You can print this camera mount from the link in the listing
I’m not sure, what I was thinking earlier. You are correct!
The 85 degree camera needs a minimum mounting height of 1067mm to see the full workarea. - So you would need to mount it at the higher (red) position.
At 1100mm, that’s a little close to the bed and you might lose a tiny bit of coverage, but you’ll be using the full resolution, which will lead to better accuracy.
The 120 degree camera (Minimum mounting height: 667mm) will cover the entire area at both mounting positions. Really, that one should only be used at the lower position. Mounted above 1m, the camera will be able to see far beyond the work area, which is of no benefit to you; instead, you lose resolution because LightBurn has to crop the image.
Anyways, thanks for this question
I find it challenging to give you the perfect recommendation. We recently received a box of cameras to run some tests on a big laser, so I will have more insights soon.
Curious to hear what others might say in this situation.
