Runescape Dwarf Mini Cannon - Motorized Ver 2.0

This is a motorized Model Dwarf Multi Cannon from Old School Runescape. The original models came from User Engineer4fun. 

I used a Arduino nano to control the stepper. (Rotates 45deg then pauses at around 18 rpm just like in the game) See attached code for the nano. 

I used the 28BYJ-48 Stepper Motor with ULN2003 Driver which are both placed inside the base. the Nano is connected to the driver via 6 24 awg wires then powered by mini usb. 

The switch I got from amazon 

More info on the stepper I used. In-Depth: Control 28BYJ-48 Stepper Motor with ULN2003 Driver & Arduino (lastminuteengineers.com)

Filament: OVERTURE PLA Plus Light Grey

Notes: The bottom plate is a bit tight so you may want to scale it down a bit (1-5%)

Arduino Code since Makerworld does not allow text file attachments. Copy this into a Arduino IDE project.

//Includes the Arduino Stepper Library

#include <Stepper.h>

// Defines the number of steps per rotation

const int stepsPerRevolution = 2038;

// Creates an instance of stepper class

// Pins entered in sequence IN1-IN3-IN2-IN4 for proper step sequence

Stepper myStepper = Stepper(stepsPerRevolution, 8, 10, 9, 11);

void setup() {

  // Nothing to do (Stepper Library sets pins as outputs)

}

void loop() {

  // Rotate CW at 16 RPM The OSRS Game version rotates at about 17 Rpm (with the pauses between 1/8 turns. 

  //45deg per game tick) but I experienced skipping at 17+.

  myStepper.setSpeed(16);

  myStepper.step(stepsPerRevolution/8 );

  delay(150);

}