DIY filament pelletizing machine

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Hello friends in this video I have made a 3D printing filament pelletizing machine.
This machine cut small small pallet of filaments, a 35mm hole saw cutter is connected with high speed motor
A stepper motor is used to feed the filament to the cutter I also used one potentiometer to control the feed rate of filament.
this will decide the size of pallets.
High feed rate equals to big pallets size and small feed rate is equal to small pallet size.

https://youtu.be/Sg2xJwojsRg


ARDUINO CODE


#
include "L298N_MotorDriver.h"
L298N_MotorDriver motor(5, 7, 8);
int DIR = A0;
int STEP = A1;
int sensorPin = A7;
int val = 0;
void setup() {
motor.setSpeed(255);
motor.setDirection(true);
pinMode(STEP, OUTPUT);
pinMode(DIR, OUTPUT);
digitalWrite(DIR, HIGH);
Serial.begin(9600);
}
void loop() {
val = analogRead(sensorPin);
if (val < 1000) {
motor.enable();
digitalW