Linear motion experimental test

Precise and controlled linear motion he had never played before, so he spent hours building a simple mobile platform device.
This is the type of system used in 3D printers to move a base or print head.

In his rig, a small laser cutting platform moves back and forth on a pair of guide rails, which is fixed on a timing belt and pulled by a stepper motor.

A cool use is for tracking lenses, but very short!