Hi all.
This is my very first Arduino project, I've been learning for a week or so now. I'm building a camera slider for timelapse photography.
I'm having a hard time finding good examples for stepper motor control, but this one DOES work, so I started adapting from it:
#include <Stepper.h>
const int stepsPerRevolution = 200; // change this to fit the number of steps per revolution
// for your motor
// initialize the stepper library on the motor shield
Stepper myStepper(stepsPerRevolution, 12,13);
// give the motor control pins names:
const int pwmA = 3;
const int pwmB = 11;
const int brakeA = 9;
const int brakeB = 8;
const int dirA = 12;
const int dirB = 13;
int x = 0;
void setup() {
Serial.begin(9600);
// set the PWM and brake pins so that the direction pins // can be used to control the motor:
pinMode(pwmA, OUTPUT);
pinMode(pwmB, OUTPUT);
pinMode(brakeA, OUTPUT);
pinMode(brakeB, OUTPUT);
digitalWrite(pwmA, HIGH);
digitalWrite(pwmB, HIGH);
digitalWrite(brakeA, LOW);
digitalWrite(brakeB, LOW);
// initialize the serial port:
Serial.begin(9600);
// set the motor speed (for multiple steps only):
myStepper.setSpeed(50);
}
void loop() {
myStepper.step(200);
delay(2000);
myStepper.step(200);
delay(2000);
}
I have added a decent amount. My goal is to have a power switch, a HI/LO speed switch, an LED indicator for power, and a POT to control speed AND direction (ultimately -> mapped such that values below ~512 will be reverse and above ~512 will be forward motion.)
SO. Now it's not doing anything really, just a little stutter step. I THINK it's a timing issue, like my loop isn't taking into account for functions becoming active or whatever...
I think the biggest clue is that my LED is not even responding to my first IF statement, which it did in another basic test I wrote.
// Include the Stepper Library
#include <Stepper.h>
// Include the Servo Library for FUTURE
#include <Servo.h>
Servo myservo; // servo object for future articulation
// map control pins
const int pwmA = 3;
const int pwmB = 11;
const int brakeA = 9;
const int brakeB = 8;
const int dirA = 12;
const int dirB = 13;
const int offSwitch = 2; // switch to turn power off to motor - in series with limit switch
const int LEDpin = 4; // power status LED
const int potIn = A0; // analog signal from pot for speed control
const int speedSwitch = 7; // switch for HIGH/LOW speed control
// variables
int STEPS = 200; // steps in 1 full rotation (1.8 degrees)
int powerVar = 0; // status for power switch
int speedVar = 0; // status for speed switch
int inVal = 0; // variable for mapping PWM to stepper
int outVal = 0; // variable for default (off) setting
int mapSpeed = 0; // variable for the mapped speed value
// Initialize stepper
Stepper myStepper(STEPS, dirA, dirB);
void setup() {
// initialize output pins
pinMode(pwmA, OUTPUT);
digitalWrite(pwmA, HIGH);
pinMode(pwmB, OUTPUT);
digitalWrite(pwmB, HIGH);
// initialize status pins
pinMode (offSwitch, INPUT);
pinMode (LEDpin, OUTPUT);
pinMode (speedSwitch, INPUT);
// Turn off the brakes
pinMode(brakeA, OUTPUT);
digitalWrite(brakeA, LOW);
pinMode(brakeB, OUTPUT);
digitalWrite(brakeB, LOW);
// Log some shit
Serial.begin(9600);
}
void loop() {
// read the potentiometer value
inVal = analogRead (potIn);
// read power status
powerVar = digitalRead (offSwitch);
// read speed switch
speedVar = digitalRead (speedSwitch);
// check if the power is ON (HIGH)
// if HIGH, then continue to check speed status
// else, no motion
if (powerVar == HIGH)
{
// Turn on LED
digitalWrite (LEDpin, HIGH);
// check speed status HI is (HIGH)
if (speedVar == HIGH)
{
// map inVar to high speed
mapSpeed = map (inVal,0,1023,1,30);
// set speed
myStepper.setSpeed (mapSpeed);
// move (STEPS)
myStepper.step (STEPS);
Serial.println (STEPS);
}
if (speedVar == LOW)
{
// map inVar to low speed
mapSpeed = map (inVal,0,1023,1,5);
// set speed
myStepper.setSpeed (mapSpeed);
// move (STEPS)
myStepper.step (STEPS);
Serial.println (STEPS);
}
else {
myStepper.step (0);
digitalWrite (LEDpin, LOW);
}
}
delay (10);
}
Any help is HUGELY APPRECIATED!!!! 
Note: I understand the speed mapping don't work as I want them to, I just wanted to get it moving, then I would figure out the proper way to deal with the forward/reverse thing.