Motor Shield V2, Wifi shield and Mega

[Bub7]

Hello, I am trying to get my motor shield to turn a single bipolar stepper motor with the example code that is provided by the shields library. My current configuration is Mega 2560, Wifi shield and then the Motor Shield V2. They all work individually but when I try run everything stacked the motor will not turn. Any help on this matter will be greatly appreciated.

[Franklin97355]

Which wifi shield and what is the code you are running? How are you powering the motor and what are the specs on the stepper, specifically the resistance per phase?

[Bub7]

Hello! Ok, this is the only part that I thing we may have a problem with. The wifi shield that I am using is the arduino wifi shield 101 https://www.arduino.cc/en/Main/ArduinoWiFiShield101. The code that I am running is this:

Code: Select all

#include <Wire.h>
#include <Adafruit_MotorShield.h>
#include "utility/Adafruit_MS_PWMServoDriver.h"

// Create the motor shield object with the default I2C address
Adafruit_MotorShield AFMS = Adafruit_MotorShield(); 
// Or, create it with a different I2C address (say for stacking)
// Adafruit_MotorShield AFMS = Adafruit_MotorShield(0x61); 

// Connect a stepper motor with 200 steps per revolution (1.8 degree)
// to motor port #2 (M3 and M4)
Adafruit_StepperMotor *myMotor = AFMS.getStepper(200, 2);


void setup() {
  Serial.begin(9600);           // set up Serial library at 9600 bps
  Serial.println("Stepper test!");

  AFMS.begin();  // create with the default frequency 1.6KHz
  //AFMS.begin(1000);  // OR with a different frequency, say 1KHz
  
  myMotor->setSpeed(10);  // 10 rpm   
}

void loop() {
  Serial.println("Single coil steps");
  myMotor->step(100, FORWARD, SINGLE); 
  myMotor->step(100, BACKWARD, SINGLE); 

  Serial.println("Double coil steps");
  myMotor->step(100, FORWARD, DOUBLE); 
  myMotor->step(100, BACKWARD, DOUBLE);
  
  Serial.println("Interleave coil steps");
  myMotor->step(100, FORWARD, INTERLEAVE); 
  myMotor->step(100, BACKWARD, INTERLEAVE); 
  
  Serial.println("Microstep steps");
  myMotor->step(50, FORWARD, MICROSTEP); 
  myMotor->step(50, BACKWARD, MICROSTEP);
}

I have my project code that actually implements the wifi shield but for the time being I am just trying to run the stepper by itself as if sits atop the wifi shield. I am powering the motor externally with a lithiam ion battery pack: https://www.adafruit.com/products/354 that is being run through a charging circuit. For the stepper it is the NEMA-17 200 steps/rev, 12V, 350 mA. Is this what you were looking for: 28 oz*in, 20 N*cm, 2 Kg*cm holding torque per phase. https://www.adafruit.com/products/324

[adafruit_support_bill]

Please post some photos of the soldering and connections to both shields.

[Bub7]

I have attached the pictured you have requested. I will have to make another post with the rest of the pictures I do not know a better way so I apologize. Thank you!

[Bub7]

Here are the rest of the pictures of my build.

[adafruit_support_bill]

Can you post a photo of the top of the motor shield also?

What do you get when you run the i2c scanner: http://playground.arduino.cc/Main/I2cScanner

[Bub7]

Here is the top view of the motor shield. Do you want me to run that program while everything is stacked or just with the motor on top of the mega?

[adafruit_support_bill]

What kind of headers are you using and why are the two pins on the end different?

[Bub7]

They are Arduino stackable header kit from Sparkfun (the old model). They are different because when I purchased them I did not realize they were for the older versions of board. At the time I was not using a Mega so I did not bother to waste time by sending the pins back and order new ones. When I realized that I needed a mega for my project I took some header pins not for stacking so I can use those pins necessary for the Motor shield to communicate with the Mega.

[adafruit_support_bill]

What do you get when you run the i2c scanner: http://playground.arduino.cc/Main/I2cScanner

[Bub7]

Am I running the program with the shields stacked or just the Mega and Motor Shield?

[adafruit_support_bill]

With the shield stacked. That is the configuration we are trying to debug, is it not?

[Bub7]

Yea, I just wasn't sure if you wanted to develop a base case before extrapolating. This was the serial output:

Scanning...
I2C device found at address 0x60 !
I2C device found at address 0x70 !
done

[adafruit_support_bill]

OK. So the shield is responding to the right i2c address.

How are you connecting your battery pack to the shield? When you run the stepper test code, do you get any vibration or noise from the motor at all?