Frédéric Blanc » MOTOR 1 AXE AccelStepper

h1. accelstepper

https://www.arduino.cc/reference/en/libraries/accelstepper/

<pre><code class="cpp">

#include <AccelStepper.h>

// for the Arduino Uno + CNC shield V3 + A4988 + FL42STH47-1684A

#define MOTOR_X_ENABLE_PIN 8

#define MOTOR_X_STEP_PIN 2

#define MOTOR_X_DIR_PIN 5

AccelStepper motor_X(1, MOTOR_X_STEP_PIN, MOTOR_X_DIR_PIN); 

void setup()

{

  motor_X.setEnablePin(MOTOR_X_ENABLE_PIN);

  motor_X.setPinsInverted(false, false, true);

  motor_X.setAcceleration(20);  

  motor_X.move(200);

  motor_X.setMaxSpeed(100);

  //motor_X.setSpeed(100);

  motor_X.enableOutputs();

}

void loop()

{

  motor_X.run();

}

</code></pre>

h2. Arduino CNC Shield V3

!clipboard-202311161621-jcg62.png!

!clipboard-202311161620-ib4yo.png!

!clipboard-202311161619-rxiam.png!

Arduino CNC Shield Scematics V3

h2. Driver MOTOR

h3. A4988

!clipboard-202311171114-jwo7q.png!

h4. Courant MAX

Vref mesure tension entre GND et le potard

MaxCurrent=Vref x 2.5

1A => 0.4V

h4. Microstepping

|MS1	|MS2	|MS3	|Résolution Microstepping|

|Low	|Low	|Low	|Pas complet (full step)|

|High	|Low	|Low	|1/2 pas|

|Low	|High	|Low	|1/4 de pas|

|High	|High	|Low	|1/8 ième de pas|

|High	|High	|High	|1/16 ième de pas|

h3. TMC2208

h4. Courant MAX

!clipboard-202311171315-ibiy9.png!

Irms = (Vref * 1.77A) / 2.5V = Vref * 0.71

Vref = (Irms * 2.5V) / 1.77A = Irms * 1.41 = Imax

Vref -> Voltage on Vref pin

Irms -> RMS (Root Mean Square) current per phase (Irms = Imax / 1.41)

Imax -> Maximum current per phase (Imax = Irms * 1.41)

|MS2(-)|MS1(-)|Steps(-)|Interpolation(-)|Mode(-)|

|GND|VIO|1⁄2|1⁄256|stealthChop2|

|VIO|GND|1⁄4|1⁄256|stealthChop2|

|GND|GND|1⁄8|1⁄256|stealthChop2|

|VIO|VIO|1⁄16|1⁄256|stealthChop2|