[qingwokou7]

Hi,
I recently got my first ever Arduino, it is an Arduino Giga R1 Wifi, a Nema 23 stepper motor 23HS45-4204S from https://www.oyostepper.it/goods-88-M...-a-4-fili.html

and a suitable driver DM556 from
https://www.skysmotor.co.uk/goods-18...-20-50VDC.html

The driver gets power from a 48v 20a ac-dc power supply. The driver is set to 400 steps/rev. In the program seen below I'm trying to make the stepper motor do 1 full rotation (meaning 400 steps).
However, during testing I've noticed, that the stepper rotates less (each time by a different amount).
I've tried giving the motor more power from the drive (the motor is rated for 4.2a, I've tried 3.1-4.3a, 3.5-4,9 and even 4.0-5.6a), but there was no difference.

The code:
Code

#include <AccelStepper.h>

#define dir 2
#define pul 22

AccelStepper stepper1(1,pul,dir);
void setup() {
// put your setup code here, to run once:
stepper1.setMaxSpeed(1000);
stepper1.setAcceleration(200);
stepper1.moveTo(400);
}

void loop() {
// put your main code here, to run repeatedly:
stepper1.run();
}
When I start the program and images of the circuit:
https://file.io/gRoTCdUCcHDu 2
The former link leads to a site where you can download the .mp4 and .png files:

I have tried using another Nema 23 (same model) and a different driver (same model) but just got the same results. I'd we incredibly happy if someone can help me to solve the problem I have.

[RaderSidetrack]

Its possible that the stepper is losing steps (driver issues a command, but the stepper mechanically cannot comply). So, try setting lower limits for the MaxSpeed and Acceleration and see what happens.

[CNCMAN172]

My guess is your sending the pulses too fast or the pulse width is too narrow. Look at the specs of your driver it will detail the waveform required

[qingwokou7]

ok, i will try again, thanks for your suggestion.

[arturod]

Maybe these recomendations may help:
https://cnc4pc.com/faq/article/how-t...stepper-motors