Stepper motor 200 step 1.8 deg + Ramp 1.4 + Arduino Mega

[Aymen FODDA]

Hello,

Currentl I am working in a project withStepper motor 200 step 1.8 deg + Ramp 1.4 + Arduino Mega and I am looking for a simple Arduino code in order to control 3 steeper motor.

Can someone help ?

Thanks in advance.

Aymen

[Jim Larson]

Hi Aymen -

Need some basic information:

What are you trying to do?

What have you done so far?

Can you please post your code and tell us what's not working or what your questions are?

       -jim

[Aymen FODDA]

Hello Jim,

Thanks for your feedback.

Actually, I am working in Robot Arm project and I am tryinig to use Stepper motor 200 step 1.8 deg + Ramp 1.4 ( to control 5 axis) + Arduino Mega.

Currently, I am trying to control just one motor but the problem the motor vibrate without any movement - seems a current or Voltage issue.

Power supply: 12 V - 4.7 A.

StepperMotor: 1.7 A

Driver adjusted A4988 adjusted to Vref 1.2 V (1.5 A) but doesn't help.

Here is the simple code used:

int ledPin =  13;    // LED connected to digital pin 13

int enx = 38;

int stepx = 54;

int dirx = 55;

 

void setup()   {                

  // initialize the digital pin as an output:

  pinMode(ledPin, OUTPUT);    

  pinMode(enx, OUTPUT);    

  pinMode(stepx, OUTPUT);    

  pinMode(dirx, OUTPUT);  

  digitalWrite(enx, HIGH);

  digitalWrite(stepx, LOW);

  digitalWrite(dirx, LOW);

 

}

 

void loop()                    

{

  digitalWrite(enx, LOW);

  digitalWrite(dirx, HIGH);

  digitalWrite(ledPin, HIGH);   // set the LED on

  for (int x = 0; x<800; x++){

    digitalWrite(stepx, HIGH);

    delayMicroseconds(1000);

    digitalWrite(stepx, LOW);

    delayMicroseconds(1000);

  }

  delayMicroseconds(500);     // wait for a second

  digitalWrite(ledPin, LOW);    // set the LED off

  delayMicroseconds(1000);    // wait for a second

}

Thanks for your help.
Aymen

[Jim Larson]

I will try your setup and software tomorrow and try to find out what's wrong.

        -jim

[Jim Larson]

Good news and bad news, Ayden. I copied your code and ran it on an Uno with the same sort of driver you have on the Ramp1.4. Worked perfectly! Motor runs great. I had only the step and direction connected; Enable was not connected (default level).

I tried turning the drive current up and down.The motor would stop with low current, but never vibrates. That was with no load on the motor. You might try varying the voltage while your sketch is running and see what happens. I've seen cases where the motor will vibrate if the current is either too high or too low. It won't hurt to turn the current control pot while the sketch is running and the motor is connected.

I'm sorry I can't nail down the problem more specifically.But at least you know your code is OK.

    -jim

[Ross Waddell]

I had similar vibration issues using a A4988 stepper motor driver which disappeared when I switched to the TMC2208 Silent StepStick. Not only did the vibration disappear, but the steppers were almost inaudible. The TMC2208 has the exact same pin outputs as the 4988 so you can just drop it in to the same connections. Adjusting the current limiter using Vref and the pot is key, of course.

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[Jim Larson]

One more thought: make sure you have your motor hooked up properly to the driver! And verify the connections for Step and Direction. Make sure they aren't swapped.

[Aymen FODDA]

Hello,

Jim and Ross, I appreciate your input.
Actually, the driver A4988 was the cause of the problem, and after swapping it out for the DRV8825, the stepper motor began to move.

I am using this code right now, and it seems to be functioning correctly, as seen in this video, but the motor moves very slowly:

https://drive.google.com/file/d/1461XayG6bLROck27zucg_TKQp8tg28CI/view?usp=sharing

Arduino Code:

// defines pins numbers

const int stepPin = 0;

const int dirPin = 1;

 

void setup() {

  // Sets the two pins as Outputs

  pinMode(stepPin,OUTPUT);

  pinMode(dirPin,OUTPUT);

}

void loop() {

  digitalWrite(dirPin,HIGH); // Enables the motor to move in a particular direction

  // Makes 200 pulses for making one full cycle rotation

  for(int x = 0; x < 200; x++) {

    digitalWrite(stepPin,HIGH);

    delayMicroseconds(500);

    digitalWrite(stepPin,LOW);

    delayMicroseconds(500);

  }

  delay(1000); // One second delay

 

  digitalWrite(dirPin,LOW); //Changes the rotations direction

  // Makes 400 pulses for making two full cycle rotation

  for(int x = 0; x < 400; x++) {

    digitalWrite(stepPin,HIGH);

    delayMicroseconds(500);

    digitalWrite(stepPin,LOW);

    delayMicroseconds(500);

  }

  delay(1000);

}

Best regards

Aymen

[Jim Larson]

Try adjusting the drive current. With the motor being stepped continually, slowly adjust the current control (Vref pot). Try increasing and decreasing it while noting the response of the motor. Avoid leaving the current turned up for long periods or the motor will heat up. I can't come up with any other plausible explanation for the behavior in your video.

HTH

                -jim