I am cutting out two plywood rectangles to be glued back to back using the same rectangle drawn in Lightburn but when I fit the plywood together, it does not line up square. What am I doing wrong? Thanks!
Some things to check:
Step/mm calibration is correct for both axes
Both diagonals of a big square are 1.414 × side length
Laser beam is perpendicular to platform
No mechanical backlash