I bought the nema 11 motor with a gearbox with a gear ratio of 13.73:1 plus a dm320 driver, and made the connection to the arduino. Where PUL = 5, DIR = 6, and OPTO = 7, Pin 7 is programmed high to be activated with 5v, now when programming I use 1/2 step in the driver configuration, which is actually 400 steps for my 1.8 degree motor, but since the motor has a gearbox included and I have to change my steps, which would be, 1.8 / 13.73 = 0.13 degrees, which would be 2769.23 steps for one motor revolution, but included at 1/2step = 400 steps in the driver would be 5538.46 revolutions of the motor so that the gearbox can make one revolution. When I program it, the gearbox makes a half turn. My question is, is there a defect with the motor? Is my analysis correct? Or do you have to include something else in the programming? This is the program: int x; int PUL = 5; int DIR = 6; int EN = 7; void setup() { pinMode(PUL,OUTPUT); // pinMode(DIR,OUTPUT); // pinMode(EN, OUTPUT); digitalWrite(PUL, LOW); digitalWrite(DIR, LOW); digitalWrite(EN, HIGH); } void loop() { digitalWrite(DIR,HIGH); // for(x = 0; x < 5538.46; x++) // { digitalWrite(PUL,HIGH); // delayMicroseconds(500); // digitalWrite(PUL,LOW); // delayMicroseconds(500); // } delay(1000); / digitalWrite(DIR,LOW); // for(x = 0; x < 5538.46; x++) { digitalWrite(PUL,HIGH); delayMicroseconds(500); digitalWrite(PUL,LOW); delayMicroseconds(500); } delay(1000); } I would be grateful for the answer