Stepper Motor Speed

Hello All,
This is the first time posting so forgive me. I am trying to code for a stepper motor using a driver. I cannot get the rpms anywhere close enough for what I need. I think I am doing it wrong in the coding. If someone can just take a look at my code and see if I am getting the highest rpms with the code I am using In the setup I have a Home move that is pretty straight forward using a micro switch. Then in loop I am moving the stepper in both directions with a pot to control the min /max speed.
Arduino Mega
DM542T driver
nema 23 stepper motor 1.8 deg 3.0 amp with brake
Here is my code

//stepper motor and driver controls
int pulse=6; //pulsing the stepper motor
int dir=8;   //direction of stepper motor
int speed=1;  // delay between pulses
int brake=A15; //stepper motor brake  LOW=off HIGH
//control inputs
int airCyl=A11;  // this controls the forward moving air cylinder HIGH=forward LOW=back
// Limit switches
int sw1=4;    //home optical switch 0=not activated 1=activated
int sw2=5;    //end optical switch

//varibles and macros
int steps=2;    //used to set home pos after homing is completed
int potPin=A4; //analog pin for poteniometer for speed
int distance = 0;
int buttonState = 0;
int onOrOffState = 0;
int endLimit = 0;
//int start=10;
int speedCount = 100;
int goBack = 0;

//Define the pins Used

void setup() {
  pinMode(brake, OUTPUT);  //sets A15 to output
  pinMode(airCyl, OUTPUT);
  pinMode(pulse, OUTPUT);  //set pulse pin to output to stepper driver
  pinMode(dir, OUTPUT);  //set direction control to stepper driver
  pinMode(sw1, INPUT_PULLUP); // Set home switch to input
  pinMode(sw2, INPUT_PULLUP);//set end/limit switch to input
  pinMode(10, INPUT_PULLUP);//start button

 //Homing procedure for Motor
 //Start moving up twoards the home switch
  digitalWrite(brake, LOW);// turn stepper motor brake off
 while (!digitalRead(sw1))  { //Do this until sw1 is activated
  digitalWrite(dir, LOW);  //HIGH=COunter Clockwise LOW=Clockwise
  digitalWrite(pulse, HIGH);  //start puling the motor
  delay(speed);                  //sets the speed of the homing
  digitalWrite(pulse, LOW);
 // Move off of home switch SW1
 while (digitalRead(sw1))  {  //do this untill sw1 is not activated
  digitalWrite(dir, HIGH);
  digitalWrite(pulse, HIGH);
  digitalWrite(pulse, LOW);
 distance = 0;  //Reset distance varible to 0
  //Serial.println(onOrOffState);  //debugging info should not be read
digitalWrite(brake, HIGH);  //turn off stepper motor brake
}// end of set up

void loop() {
   //Start button wait  
  buttonState = digitalRead(10);
  if (buttonState == LOW)  { //Low means button is pressed
      onOrOffState = 1; 
      digitalWrite(brake, LOW);// Turn stepper motor brake off
      digitalWrite(airCyl, LOW);//Move the platform forward
      delay(5000);//Adjustable delay time for platform to move and heat up tube
  // button push changes state and now motorl moves twoards end switch
    while (onOrOffState == 1) {
     //speed control
   if(speedCount == 0) {
     speed = analogRead(potPin); //analog adjust to speed of movement of platform
      speed = map(speed,0, 1023, 25, 1);// 0-1023 arduino voltage maped to 25-1 pulse speed to motor
      //Serial.println(speed);//debugging info
      speedCount = 100;}//time delay for reading the analog read on speed poteniometer
    digitalWrite(dir, HIGH);
    digitalWrite(pulse, HIGH);
    digitalWrite(pulse, LOW);
    distance = distance + 1;//start counting distance from home position
    speedCount = speedCount - 1;//start counting for read on speed potinometer
    //Serial.println(speedCount);//debugging info
   Serial.println(distance);//debugging info
     endLimit = digitalRead(5);//setting endlimit varible to pin 5 or sw2
        if (digitalRead(sw2))  { //Do this until sw2 is activated
        digitalWrite(airCyl, HIGH);//move platform back
        onOrOffState = 0;
       goBack = 1;}
    while(goBack == 1) {// move back the same amount of steps that it moved forward
          digitalWrite(dir, LOW);
          digitalWrite(pulse, HIGH);
          digitalWrite(pulse, LOW);
          distance = distance - 1;// minus the distance
            if (distance == 0)  {//when distance hits 0 set goback varible to 0
             goBack = 0;}


I suspect the voltage you are running the stepper at is really too low. I see you do not wait for the brake to be released. Is it really instantaneous? Please identify the power supply you are using for the motor.

I am running a 24 vdc 15a power supply. That should be plenty for a 3 amp motor.

I am running a 24 vdc 15a power supply. That should be plenty for a 3 amp motor.

Yes, it does. What happens when you run other stepper test programs?

I doubt your motor can go from zero to 1000 steps per second instantly, you need to accelerate gradually. Check out the AccelStepper library.

Its completely essential to ramp step rates with a large stepper such as NEMA17 or larger if you
want full performance. You have to accelerate the rotor smoothly or it will simply stall immediately
on a large change in step-rate. Libraries like AccelStepper are a good starting point.

If the motor has an electromagnetic brake it may need much more than 10ms to release (think 0.5s or
so - the magnetic field has to die right down in the solenoid).