Bobinadora con arduino

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I need to make a couple of spools with thousands of turns of very fine magnet wire for another project I have on the go. Making the bobbin by hand is absolute madness. So, taking advantage of the fact that I have a step motor as a spare from my 3D printer and an Arduino nano, I decided to create this bobinadora. I currently have the Arduino and driver board on a protoboard. Later, I plan to print a case where I can hide all the electronics and have a display showing the number of turns and the potentiometer for adjusting the rotation speed. In this version, you can know the number of turns if the Arduino is connected to the PC through the serial port and the Arduino IDE. To move the NEMA 17 motor, I followed the tutorial by A. García at: http://diymakers.es/mover-motores-paso-paso-con-arduino/ And the connection schema from yomaker:http://yomaker.com/control-de-motor-paso-a-paso/ I removed the switch to change direction because I didn't have enough space on the protoboard, so there are two commented lines that need to be uncommented if you put said button. The Arduino code I used is as follows: #include <Stepper.h> //Importing the library for controlling step motors #define STEPS 800 //Number of steps needed for a full rotation. 800 in my case int PIN_STEP = 3; //step pin of the pololu int PIN_DIRECTION = 9; //direction pin of the pololu int potenciometro; //reading from the potentiometer int boton = 7; //button pin to change direction int direccion =1; //rotation direction int contador =0; //counter for the number of turns //Giving a name to the motor, number of steps and control pins Stepper stepper(STEPS, PIN_DIRECTION, PIN_STEP); //Stepper motor name (number of steps per rotation, control pins) void setup() { //Motor speed in RPM stepper.setSpeed(100); //Sets the motor speed in revolutions per minute (RPM) pinMode(boton, INPUT); Serial.begin(9600); } void loop() { // int sentido = digitalRead(boton); //checking if the button is pressed // if(sentido==1) direccion *=-1; //if it's pressed, change direction potenciometro = analogRead(A0); //reading from the potentiometer potenciometro = map(potenciometro,0,1024,10,300); //adapting the read value to a delay stepper.setSpeed(potenciometro); //Sets the motor speed in revolutions per minute (RPM) //Turning one full rotation in one direction stepper.step(STEPS*direccion); contador++; Serial.println(contador); }