SMD-flipper

Project showcase

Components and supplies

stepper motor 28BYJ-48 5VDC

Screenshot 2019 06 14 15 28 58 udl6wzcwho

Arduino Nano Every

micro switch

9V 1A Switching Wall Power Supply

Necessary tools and machines

3D Printer (generic)

Dremel multitool

About this project

For my manual pick and place machine, it would be handy to have a tool that flips SMD parts that are upside down in the storage box.

The supplier has such a tool but it is not that cheap, so could I make such a tool myself?

Yes...

First, my son has designed the needed parts with Solid Works and prepared them for 3D printing.

After that, I wrote a test program for driving the stepper motors.

I'm using a Arduino Nano Every because of his price and the dimensions.

It is not that fast but it works. Power supply, plexi and switch are recup material.

Here is the result:

Code

SMD-flipperArduino

This is the code on the Arduino Nano Every

/*
SMD-flipper

Device for flipping SMD-part.

created september 2020

By Staf Van Gestel

Based on program found on https://arduino-lessen.nl

the position of the two tools must be correct before starting the device
*/

#include <AccelStepper.h>           // Gebruikt AccelStepper bibliotheek

#define motor1Pin1  4               // IN1 pin op de ULN2003A driver
#define motor1Pin2  5               // IN2 pin op de ULN2003A driver
#define motor1Pin3  6               // IN3 pin op de ULN2003A driver
#define motor1Pin4  7               // IN4 pin op de ULN2003A driver
#define motor2Pin1  8               // IN1 pin op de ULN2003A driver
#define motor2Pin2  9               // IN2 pin op de ULN2003A driver
#define motor2Pin3  10              // IN3 pin op de ULN2003A driver
#define motor2Pin4  11              // IN4 pin op de ULN2003A driver
#define StartSwitch 2               // D2 for switch.
int stepsPerRevolution = 64;        // stappen per omwenteling - steps per rotation
float degreePerRevolution = 5.625;  // graden per omwenteling - degrees per rotation

AccelStepper stepper1(AccelStepper::HALF4WIRE, motor1Pin1, motor1Pin3, motor1Pin2, motor1Pin4);
AccelStepper stepper2(AccelStepper::HALF4WIRE, motor2Pin1, motor2Pin3, motor2Pin2, motor2Pin4);

void setup() {
  pinMode(2,INPUT_PULLUP);           // activation switch
  stepper1.setMaxSpeed(1000.0);      // max motorsnelspeed
  stepper1.setAcceleration(200.0);   // acceleration speed
  stepper1.setSpeed(1000);           // rotation speed
  stepper2.setMaxSpeed(1000.0);      // max motorspeed
  stepper2.setAcceleration(200.0);   // acceleration speed
  stepper2.setSpeed(1000);           // rotation speed
}


void loop(){ 
if (digitalRead(StartSwitch) == false) {
   stepper1.moveTo(degToSteps(-180));
   do {   
   }
   while (stepper1.run()); // turn first tool on top of the other.

   stepper2.moveTo(degToSteps(-180));
   stepper1.moveTo(degToSteps(0));
   do {   
   stepper1.run();
   }
   while (stepper2.run() && stepper1.run());  // here both steppers are moved to next position
   stepper2.moveTo(degToSteps(0));
   do {   
   }
   while (stepper2.run()); // second tool is moved to his initial position, smd-part is turned around.
   }  
}

// calculate the # if degrees to # of steps
// f.e. 45° = 64 / 5,625 = 1024 stappen
 */
float degToSteps(float deg) {
  return (stepsPerRevolution / degreePerRevolution) * deg;
}