Description

Laser exposer - SketchUp project. X lines are provided by polygon mirror, taken from LaserJet 6L LSU.

Bottom view - moving board in Y direction done with stepper motor and lead screw.

STM32F103C8T6 "Blue Pill" board is used for the control

Python based GUI:

The first tests - result is not very good, I haven't got 0.2mm tracks with 0.2mm clearance. Reason?

Polygon mirror error

  1. Beam is not focused well

  2. Polygonal mirror create 4 lines with offset instead single one.

  3. Beam sync sensor is not working stable because beam is not focused on the sensor.

  4. Design converter to bitmap image is very far away to be perfect

After some improvement it looks much better: