Help with Arduino code

[EdK]

Chuck,

Try this code as a test.

Code:

/*

Test that turns the stepper motor in one direction for about 3 seconds and then reverses it for 3 seconds in a continuous cycle. Digital pin 12 is the step signal and 13 is the direction signal.

*/

#include <Wire.h>

//setup vars
const int stp = 12;  //connect pin 12 to step
const int dir = 13;  // connect pin 13 to dir
const int StepsPerRotation = 200; //Set Steps per rotation of stepper
const int TableRatio = 90; //ratio of rotary table
const int Multiplier = (StepsPerRotation * TableRatio)/360;
const int stepdelay = 1;
float Degrees = 0;                //Degrees from Serial input
float ToMove = 0;                 //Steps to move
int Direction = 1;
int repeat = 0;


void setup()
 {

   pinMode(stp, OUTPUT);
   pinMode(dir, OUTPUT);
 
 }
 

void rotation(float tm, int d)
 {  
   if(d == 0)
     {
       digitalWrite(dir, LOW);
     }
 else
   {
     digitalWrite(dir, HIGH);
   }
 
 for(int i = 0; i < tm; i++)  
  {    
   digitalWrite(stp, HIGH);  
   delay(stepdelay);              
   digitalWrite(stp, LOW);  
   delay(stepdelay);
  }
}


void loop()
{
   if(repeat == 0)
   {
     Degrees = 30;
   }
   
   Degrees = Degrees * Direction;

   if(Degrees < 0)
   {
     ToMove = (Degrees*Multiplier)*-1;
     rotation(ToMove,0);
   }
   else
   {
     ToMove = Degrees*Multiplier;
     rotation(ToMove,1);
   }
   
  if (Direction == 1)
    Direction = -1;
  else
    Direction = 1;
     
}

All it does is to turn the stepper motor in one direction for about 3 seconds and then reverses the direction for about 3 seconds and repeats the cycle until power is removed. Digital pin 12 is the step and 13 is the direction.

Ed