motorized camera slider - cheap and simple

thingiverse

Here are the 3D printed parts: three pieces. The NEMA 17 stepper motor, any will do. Two FL05 flange bearings - model included for representation purposes only, not to be printed. Two GT2 pulleys and a two-meter belt - can be purchased as a set. Four twelve-millimeter polished stainless steel rods - full or heavy versions are available, or hollow and more expensive ones. Alternatively, four chrome-plated linear motion shafts can be used, although they are quite pricey. The following parts are also required: four linear bearings LM12UU, four zip ties, a camera ball head of your choice, an Arduino board, two-axis joystick, stepper driver A4988 or DRV8825 - any will suffice. Some M3 nuts and bolts for the motor and bearing housing are needed as well. All these components, excluding the ball head and 3D printed parts, can be acquired for less than forty to fifty euros.