Motorized Turntable for 3D Scanning

thingiverse

This unit is made to fit a 2BYJ-48 stepper, some 3D printed gears, and then self-tap onto a threaded tripod! Some assembly is required, as you will have to supply your own electronics and base. And as a quick note, the base file is called the 'KinectScanMainMount' because I designed it to rotate the piece I was scanning while my Kinect captured the depth data. UPDATE #1: Added the gears and tray needed for assembly. Will be testing soon. UPDATE #2: A few minor tweaks made so everything would fit nicely. Second round of tests commencing shortly. UPDATE #3: Alright, things seem to be looking fit and ready so I'm going to remove the work-in-progress designation and hope for the best! [Here it is in action](https://www.youtube.com/watch?v=l_sDvCMXHp8) + [Video Tutorial for anyone interested in learning the basics of Kinect scanning](https://youtu.be/yXZRvrnQ51w) Needs: 1x KinectScanMainMount.stl 1x TurntableGearLarge.stl 1x TurntableGearSmall.stl 1x TurntableTray.stl (You choose whether you'd like it with or without quadrants - example in picture set above) 2x M3 screws to fix tray to large gear 1x [2BYJ-48 stepper motor and driver](https://smile.amazon.com/ELEGOO-28BYJ-48-ULN2003-Stepper-Arduino/dp/B01CP18J4A) 1x [Arduino microcontroller](https://smile.amazon.com/LAFVIN-ATmega328P-ATMEGA16U2-Compatible-Arduino/dp/B07GDKLLMJ/) 1x [9V 1A power supply adapter](https://smile.amazon.com/Arduino-power-supply-adapter-110V/dp/B018OLREG4) 1x Standard threaded tripod or base of your choosing. Arduino setup for beginners: 1. Make sure you have the [Arduino IDE](https://www.arduino.cc/en/main/software) installed on your computer. 2. Following the general steps in [this tutorial](https://www.youtube.com/watch?v=lmMTsbSbHC8), use the Male-to-Female jumper wires to connect the Arduino pins 2,3,4, and 5 to IN1, IN2, IN3, and IN4 on the ULN2003 stepper driver. **(Not pins 8-11 shown in the video!)** 3. Connect the 5V and GND pins to the + and - pins on the stepper driver. 4. Copy and paste the following sketch into the IDE, then hit the 'Upload' arrow in the top left under the menu: <code> //Put all the pins in an array to make them easy to work with int pins[] { 2, //IN1 on the ULN2003 Board, BLUE end of the Blue/Yellow motor coil 3, //IN2 on the ULN2003 Board, PINK end of the Pink/Orange motor coil 4, //IN3 on the ULN2003 Board, YELLOW end of the Blue/Yellow motor coil 5 //IN4 on the ULN2003 Board, ORANGE end of the Pink/Orange motor coil }; //Define the wave drive sequence. //With the pin (coil) states as an array of arrays int waveStepCount = 4; int waveSteps[][4] = { {HIGH,LOW,LOW,LOW}, {LOW,HIGH,LOW,LOW}, {LOW,LOW,HIGH,LOW}, {LOW,LOW,LOW,HIGH} }; //Define the full step sequence. //With the pin (coil) states as an array of arrays int fullStepCount = 4; int fullSteps[][4] = { {HIGH,HIGH,LOW,LOW}, {LOW,HIGH,HIGH,LOW}, {LOW,LOW,HIGH,HIGH}, {HIGH,LOW,LOW,HIGH} }; //Define the half step sequence. //With the pin (coil) states as an array of arrays int halfStepCount = 8; int halfSteps[][4] = { {HIGH,LOW,LOW,LOW}, {HIGH,HIGH,LOW,LOW}, {LOW,HIGH,LOW,LOW}, {LOW,HIGH,HIGH,LOW}, {LOW,LOW,HIGH,LOW}, {LOW,LOW,HIGH,HIGH}, {LOW,LOW,LOW,HIGH}, {HIGH,LOW,LOW,HIGH} }; //Keeps track of the current step. //We'll use a zero based index. int currentStep = 0; //Keeps track of the current direction //Relative to the face of the motor. //Clockwise (true) or Counterclockwise(false) //We'll default to clockwise bool clockwise = true; // How many steps to go before reversing, set to zero to not bounce. //int targetSteps = 0; //targetSteps 0 means the motor will just run in a single direction. //int targetSteps = 2048; //2049 steps per rotation when wave or full stepping int targetSteps = 4096; //4096 steps per rotation when half stepping void setup() { // put your setup code here, to run once: Serial.begin(9600); for(int pin = 0; pin < 4; pin++) { pinMode(pins[pin], OUTPUT); digitalWrite(pins[pin], LOW); } } void step(int steps[][4], int stepCount) { //Then we can figure out what our current step within the sequence from the overall current step //and the number of steps in the sequence int currentStepInSequence = currentStep % stepCount; //Figure out which step to use. If clock wise, it is the same is the current step //if not clockwise, we fire them in the reverse order... int directionStep = clockwise ? currentStepInSequence : (stepCount-1) - currentStepInSequence; //Set the four pins to their proper state for the current step in the sequence, //and for the current direction for(int pin=0; pin < 4; pin++){ digitalWrite(pins[pin],steps[directionStep][pin]); } } void loop() { //Comment out the Serial prints to speed things up //Serial.print("Step: "); //Serial.println(currentStep); //Get a local reference to the number of steps in the sequence //And call the step method to advance the motor in the proper direction //Wave Drive //int stepCount = waveStepCount; //step(waveSteps,waveStepCount); //Full Step //int stepCount = fullStepCount; //step(fullSteps,fullStepCount); //Half Step int stepCount = halfStepCount; step(halfSteps,halfStepCount); // Increment the program field tracking the current step we are on ++currentStep; // If targetSteps has been specified, and we have reached // that number of steps, reset the currentStep, and reverse directions if(targetSteps != 0 && currentStep == targetSteps){ currentStep = 0; // clockwise = !clockwise; } else if(targetSteps == 0 && currentStep == stepCount) { // don't reverse direction, just reset the currentStep to 0 // resetting this will prevent currentStep from // eventually overflowing the int variable it is stored in. currentStep = 0; } //2000 microseconds, or 2 milliseconds seems to be //about the shortest delay that is usable. Anything //lower and the motor starts to freeze. //delayMicroseconds(2250); delay(1); } </code> + Once that's done, disconnect the Arduino from the computer, plug it into the power cable, and connect the stepper to the stepper driver. Your turntable should now function! [Like this](https://www.youtube.com/watch?v=ecsKvfNM28w) Note: you can hear my 3D printer in the background, the turntable itself is essentially silent. **Be aware that leaving this running for large amounts of time can cause a lot of heat on the Arduino, so be careful!**