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

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Sam Ade 2020-5-28

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https://ww2.mathworks.cn/matlabcentral/answers/536119-stepper-motor-control-with-dm320t-raspberry-pi-3b-and-matlab

编辑： Sam Ade 2020-5-31

DM320T_STEPPER_MOTOR_CONNECTION.png

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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