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

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Emmin
Emmin on 18 Dec 2012
Commented: Mohamed Ammar on 8 Apr 2019
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.

  3 Comments

Jonathan
Jonathan on 18 Dec 2012
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
Emmin on 20 Dec 2012
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.

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Answers (1)

Rolfe Dlugy-Hegwer
Rolfe Dlugy-Hegwer on 12 Feb 2013
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.

  2 Comments

John
John on 11 Nov 2014
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
Mohamed Ammar on 8 Apr 2019
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

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