Kinematic system

Recently (early March 2024), I built the kinematic system to move the laser head and the print bed.

The laser moves in X (left-right) axis, and the bed moves in Y (forward-backward) and Z (up-down) axis.
All the axes are driven by cheap 28BYJ-48 stepper motors.

Operation as a laser marker

To test the kinematic system and laser control, I used the machine as a laser marker to draw burned image on a paper.
The image (★) was marked on a paper by raster-scanning laser.

The burned image was clear, but there were "zig-zag" artifacts on edges.
As it indicates there are unexpected deviation of X position between left-to-right and right-to-left scan lines, there is room for improvement in mechanical accuracy and/or motion control program.