STEPPER MOTOR CONTROL WITH DM320T, RASPBERRY PI 3B AND MATLAB

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Sam Ade
Sam Ade 2020-5-28
编辑： Sam Ade 2020-5-31
Hi All,
Please, I need help troubleshooting my stepper motor control setup.
I am trying to rotate a stepper motor a certain angle at a given speed.
I connected and program the setup as follows but I can't get the stepper motor to move. I suspect it is my code, however, I found little coding resource online about this.
I would appreciate any help and/or suggestions. Thanks in advance.
UPDATE: My connections and program are right. I found out that the stepper motor driver (DM320T) I used requires a digital signal voltage of 4-5v (for High) for PUL. However, the raspberry pi digital pin doles out a 0-3.3v. In effect, it was still read by the DM320T as a Low.
As a result, I switched to an Arduino Micro which has a digital pin voltage of 0-5v and capable of providing the requirement for PUL.
Connections and Wiring:
MATLAB Program:
clear all; clc;
MainRasp = raspi('192.168.1.134', 'pi','raspberry');
ENA = 4;
DIR = 17;
PUL = 18;
configurePin(MainRasp, PUL, 'DigitalOutput');
configurePin(MainRasp, DIR, 'DigitalOutput');
configurePin(MainRasp, ENA, 'DigitalOutput');
writeDigitalPin(MainRasp, PUL, 1);
writeDigitalPin(MainRasp, DIR, 0);
writeDigitalPin(MainRasp, ENA, 1);
angle = 40;
steps_per_rev = 100;
micro_step = 8;
angle_per_step = 360/(steps_per_rev*micro_step);
numSteps = floor(angle/angle_per_step);
for step = 1:numSteps
writeDigitalPin(MainRasp, PUL, 1);
pause(0.001);
writeDigitalPin(MainRasp, PUL, 0);
pause(0.001);
end

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