Aluminum_Slider_Arduino

https://www.thingiverse.com/thing:2439194

https://www.instructables.com/id/Simple-Camera-Slider-Electronics/

https://www.instructables.com/id/Motorized-Camera-Slider-With-Android-App/

 OpenBuilds 

https://openbuilds.com/builds/v-slot%E2%84%A2-linear-actuator-build-belt-driven.80/

Parts Shopping!

pre-built parts : https://openbuilds.com/builds/v-slot%E2%84%A2-linear-actuator-build-belt-driven.80/

    https://www.inventables.com/projects/simple-camera-slider

    https://openbuildspartstore.com/v-slot-nema-17-linear-actuator-bundle-belt-driven/

Belt clamp : https://www.inventables.com/technologies/makerslide-belt-clip

??

V-slot 20 x 20 Linear Rail    vs    Anet am8 2020 mod    vs    20x20 aluminum extrusion?

Arduino part

http://forum.arduino.cc/index.php?topic=248161.0

const int ForwardLimitSwitchPin = 2;
const int ReverseLimitSwitchPin = 3;
const int StepperStepPin = 4;
const int StepperDirectionPin = 5;
const int LimitSwitchActivated = LOW;  // Limit switch grounds pin
const int StepperMaxRPM = 100;

Stepper stepper(200, StepperStepPin, StepperDirectionPin);

void setup() {
   pinMode(ForwardLimitSwitchPin, INPUT_PULLUP);
   pinMode(ReverseLimitSwitchPin, INPUT_PULLUP);
   stepper.setSpeed(StepperMaxRPM);
}

void loop() {
   // Step forward until the limit switch is activated
   while (digitalRead(ForwardLimitSwitchPin) != LimitSwitchActivated) {
       stepper.step(1);
   }
   // Step reverse until the limit switch is activated
   while (digitalRead(ReverseLimitSwitchPin) != LimitSwitchActivated) {
       stepper.step(-1);
   }

}

https://howtomechatronics.com/tutorials/arduino/how-to-control-stepper-motor-with-a4988-driver-and-arduino/