Wiki » History » Revision 9
Revision 8 (Frédéric Blanc, 2023-11-17 13:20) → Revision 9/13 (Frédéric Blanc, 2023-11-17 13:21)
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)
h4. Microstepping
|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|