How can I run 2 stepper motors simultaneously connected to an arduino Uno using Matlab?

Hi all,

I am using a motor shield with the arduino Uno.

I want to be able to run 2 stepper motors simultaneously.

This is a code that runs the 2 motors, but not simultaneously, as in, for motor 2 to start, it has to wait for motor 1 to stop.

I have tried to use 'parfor' loops instead of 'for' loops, that didn't do the trick.

I have tried uploading an edited version of the srv.pde to integrate the I2C and AccelStepper libraries, but I'm not getting a simultaneous movement either...

I added to the srv.pde:

#include <Wire.h>
#include <AccelStepper.h>

and to the void loop (), I added:

Wire.beginTransmission (100);

and uploaded that as to the master arduino.

and uploaded to the slave arduino:

#include <Wire.h>

void setup()
{
Wire.begin(100);
Wire.onReceive(receiveEvent);
}

void loop()
{}

void receiveEvent( int howMany)
{
while (Wire.available())
{}}

I need help modifying the srv.pde so that when I upload it, I would be able to run the stepper motors simultaneously. Or another way, without having to modify the srv.pde file, to be able to run the motors simultaneously...

Thank you.

[Merged information from duplicate Question]

Hi, I have 2 arduinos, 2 motor shields, and 2 stepper motors. I want the 2 motors to run simultaneously, when I connect the 2 steppers to one arduino, the motors do not run at the same time. For example, in a for loop like this, motor 1 will run, stop, then moto 2 will run, stop.

for k=1:3;

a.stepperStep(1,'forward','double',200);

a.stepperStep(2,'forward','double',200);

end

The same issue occurs if I have 2 arduinos connected. For example, the for loop would be like this:

for k=1:3;

a.stepperStep(1,'forward','double',200);

b.stepperStep(1,'forward','double',200);

end

with "b." representing a different arduino than the "a."

Is there a way to make the 2 motors run at the same time?

Thank you.

[Jonathan]

If you have 2 arduinos you could just create 2 serial (COM) objects in MatLab, one for each arduino, and have the arduinos control their own motor independently. What is the application? I might be misunderstanding what you're looking for.

[Emmin]

Hi Jonathan. I want the 2 motors to run simultaneously, when I connect the 2 steppers to one arduino, the motors do not run at the same time. For example, in a for loop like this, motor 1 will run, stop, then moto 2 will run, stop.

for k=1:3;

a.stepperStep(1,'forward','double',200);

a.stepperStep(2,'forward','double',200);

end

The same issue occurs if I have 2 arduinos connected. For example, the for loop would be like this:

for k=1:3;

a.stepperStep(1,'forward','double',200);

b.stepperStep(1,'forward','double',200);

end

with "b." representing a different arduino than the "a."

Is there a way to make the 2 motors run at the same time?

Thank you.

[vishal Verma]

Did you figure out the solution by chance?

Answer 1

[Rolfe Dlugy-Hegwer]

If you install the Simulink Support Package for Arduino Hardware, check out the "Drive with PID Control" tutorial example with its arduinomega2560_drive_openloop.mdl model.

To add this capability, enter "targetinstaller" in the MATLAB Command Window. Then follow the instructions in Support Package Installer.

[John]

Hello

I have an Arduino Uno and the Motor Shield V2 I'm able to control the two steppers with the speed and the rotation angle i want but not at the same time.The code i write at the MATLAB's M-File is this one:

    %  a=arduino('COM3');

 a.stepperSpeed(1,10);
 a.stepperSpeed(2,20);

 a.stepperStep(1,'forward','single',48);
 a.stepperStep(2,'forward','single',48);

The pde file that i upload the Arduino is the motor_V2.pde .

I tried to upload different pde but nothing happend.

Also I tried for Simulinks Support Package i read in another post, but the package is for MATLAB 2012 and I don't want run the motors from simulink.

Is there anyway way for run the motors simultaneously?

Thank you.

[Mohamed Ammar]

im using two stepper motopr with a motor sheild l293 d, i couldnt able to run two stepper mpotor at the same time.. help me out