Laser Cutter: LightBurn Camera Accuracy

After going through the LightBurn camera alignment / calibration process, I thought it would be interesting to see how well the corrected image matches the design grid.

Burn some holes and draw lines 10 mm in from the physical corners, like this:

LB Camera Cal - corner target
LB Camera Cal – corner target

Burn holes and lay in a 10 mm grid at the center point:

LB Camera Cal - center grid
LB Camera Cal – center grid

The center grid as seen through the camera:

LB Camera Cal - center grid overlay
LB Camera Cal – center grid overlay

That’s after adjusting the X and Y offset to align the center of the imaged grid with the center of the design grid. That’s using the non-faded image to make the target lines more visible.

The corner markers don’t quite line up with the grid, but they’re not off by much (using the faded image to make the grid more visible):

  • LB platform overlay - adj - rear left
  • LB platform overlay - adj - rear right
  • LB platform overlay - adj - front left
  • LB platform overlay - adj - front right

You could, of course, split the difference among all five sites, but I think having the middle of the platform be more accurate than the far corners makes more sense.

In any event, a few millimeters works for most purposes, even if you’d want to verify the alignment for critical operations before firing the laser in earnest.

Spam comments get trashed, so don't bother. Comment moderation may cause a delay.

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s