I need help getting the camera + laser to work correctly. When I do the calibration with a piece of paper, it cuts a nice square and the box is lined up perfectly. When I put something on the platform, it’s horribly misaligned. See the attached picture.
Any help would be greatly appreciated.
The camera creates a mask or algorithm for stitching at calibration, so later on when using CamCap it will do the same stiching regardless of what the photos taken are showing.
So when you capture something thats (considerably) thicker than the original material you used to calibrate, you get this result.
I’m not saying this is a good thing, I don’t like it either.
Btw, camera capture is not accurate (yet).
Maybe put a metal sheet on top of your workpiece, a piece of paper on top of that, and run calibration again.
Maybe put a metal sheet on top of your workpiece, a piece of paper on top of that, and run calibration again.
Why? The 3D printhead has a magnetic sensor. The laser does not. It uses the camera.
The camera calibration isn’t great with something flat to the bed. It completely falls apart as soon as you have a thicker piece that’s raised off the bed.
-S
So what is the recommended solution? How do I calibrate this to print accurately? The work material is 4.3mm thick.
Metal sheet(as thin as possible but won’t bend kinda like the printbed, but I wouldn’t use that if I were you), so your workpiece isn’t touched by the laser. Paper to laser the calibration lines (square) onto.
Then use those lines to have the camera stitch and your higher workpiece will properly align.
I gave up on camera calibration.
Generally I just watch when it runs boundary and I can get get close enough.
When I need to place something accurately I use piece of thick paper like a file folder on top of my work piece (adjust the height for paper thickness) and set the laser low enough power that it won’t cut through but high enough to mark it. Then I just play with origin (or measure offset) until I feel it’s right. It’s a bit of trial and error but usually by the third try I’ve got it right.
-S
Software: Luban 3.7.0
Can you follow these steps to run the calibration again?
After adjusting the square (to the shape), you need to press ‘Confirm’ then ‘Apply’
Then you place the diagram
Then press Start, it works perfectly!
Best regards,
Software: Luban 3.7.0
Can you follow these steps to run the calibration again?
We need to go back to Luban 3.7 to use camera calibration?
-S
No, it does not work perfectly. Those are the steps I followed when it took the photo of the round wooden disc and the alignment was messed up.
I just tried to run it by putting a piece of paper on top of my work surface, and the laser pushed into it and then tore the paper by dragging it around. I am pretty fed up with this thing. Please provide clear steps on correctly calibrating the camera at a specific work height.
I agree this is a HUGE Pain. I tried the paper and it rammed the laser head into the table and dragged it across before I got to the E Stop. The still picture with four holes makes ZERO sense. What would make sense for calibration is letting the camera run and have us manually stitch the items together. or better yet the camera should know where it is located according to the table and we should be able to get a pretty optimal view that way and the software could automatically stitch it without any calibration. If we adjust the thickness of the material being lasered it would adjust the camera upaccordingly.
