Wiki » History » Version 11
Frédéric Blanc, 2023-11-17 18:02
| 1 | 3 | Frédéric Blanc | h1. accelstepper |
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| 2 | |||
| 3 | https://www.arduino.cc/reference/en/libraries/accelstepper/ |
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| 4 | 2 | Frédéric Blanc | |
| 5 | 1 | Frédéric Blanc | <pre><code class="cpp"> |
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| 7 | |||
| 8 | |||
| 9 | #include <AccelStepper.h> |
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| 10 | |||
| 11 | // for the Arduino Uno + CNC shield V3 + A4988 + FL42STH47-1684A |
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| 12 | |||
| 13 | #define MOTOR_X_ENABLE_PIN 8 |
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| 14 | #define MOTOR_X_STEP_PIN 2 |
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| 15 | #define MOTOR_X_DIR_PIN 5 |
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| 16 | |||
| 17 | AccelStepper motor_X(1, MOTOR_X_STEP_PIN, MOTOR_X_DIR_PIN); |
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| 18 | |||
| 19 | |||
| 20 | void setup() |
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| 21 | { |
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| 22 | motor_X.setEnablePin(MOTOR_X_ENABLE_PIN); |
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| 23 | motor_X.setPinsInverted(false, false, true); |
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| 24 | motor_X.setAcceleration(20); |
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| 25 | motor_X.move(200); |
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| 26 | motor_X.setMaxSpeed(100); |
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| 27 | //motor_X.setSpeed(100); |
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| 28 | motor_X.enableOutputs(); |
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| 29 | } |
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| 30 | |||
| 31 | void loop() |
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| 32 | { |
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| 33 | motor_X.run(); |
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| 34 | } |
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| 35 | </code></pre> |
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| 36 | 4 | Frédéric Blanc | |
| 37 | h2. Arduino CNC Shield V3 |
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| 38 | |||
| 39 | !clipboard-202311161621-jcg62.png! |
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| 40 | |||
| 41 | !clipboard-202311161620-ib4yo.png! |
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| 42 | |||
| 43 | !clipboard-202311161619-rxiam.png! |
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| 44 | Arduino CNC Shield Scematics V3 |
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| 45 | 5 | Frédéric Blanc | |
| 46 | h2. Driver MOTOR |
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| 47 | |||
| 48 | h3. A4988 |
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| 49 | |||
| 50 | !clipboard-202311171114-jwo7q.png! |
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| 51 | |||
| 52 | 6 | Frédéric Blanc | h4. Courant MAX |
| 53 | |||
| 54 | 5 | Frédéric Blanc | Vref mesure tension entre GND et le potard |
| 55 | MaxCurrent=Vref x 2.5 |
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| 56 | 1A => 0.4V |
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| 57 | 6 | Frédéric Blanc | |
| 58 | h4. Microstepping |
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| 59 | |||
| 60 | |MS1 |MS2 |MS3 |Résolution Microstepping| |
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| 61 | |Low |Low |Low |Pas complet (full step)| |
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| 62 | |High |Low |Low |1/2 pas| |
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| 63 | |Low |High |Low |1/4 de pas| |
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| 64 | |High |High |Low |1/8 ième de pas| |
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| 65 | |High |High |High |1/16 ième de pas| |
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| 66 | 7 | Frédéric Blanc | |
| 67 | h3. TMC2208 |
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| 68 | |||
| 69 | h4. Courant MAX |
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| 70 | |||
| 71 | !clipboard-202311171315-ibiy9.png! |
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| 72 | |||
| 73 | Irms = (Vref * 1.77A) / 2.5V = Vref * 0.71 |
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| 74 | Vref = (Irms * 2.5V) / 1.77A = Irms * 1.41 = Imax |
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| 75 | Vref -> Voltage on Vref pin |
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| 76 | 1 | Frédéric Blanc | Irms -> RMS (Root Mean Square) current per phase (Irms = Imax / 1.41) |
| 77 | 8 | Frédéric Blanc | Imax -> Maximum current per phase (Imax = Irms * 1.41) |
| 78 | |||
| 79 | 9 | Frédéric Blanc | h4. Microstepping |
| 80 | 8 | Frédéric Blanc | |
| 81 | |MS2(-)|MS1(-)|Steps(-)|Interpolation(-)|Mode(-)| |
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| 82 | |GND|VIO|1⁄2|1⁄256|stealthChop2| |
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| 83 | |VIO|GND|1⁄4|1⁄256|stealthChop2| |
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| 84 | |GND|GND|1⁄8|1⁄256|stealthChop2| |
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| 85 | |VIO|VIO|1⁄16|1⁄256|stealthChop2| |
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| 86 | 10 | Frédéric Blanc | |
| 87 | <pre><code class="cpp"> |
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| 88 | void setup() |
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| 89 | { |
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| 90 | motor_X.setEnablePin(MOTOR_X_ENABLE_PIN); |
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| 91 | motor_X.setPinsInverted(false, false, false); |
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| 92 | motor_X.setAcceleration(2560); |
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| 93 | motor_X.move(25600); |
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| 94 | motor_X.setMaxSpeed(1000000); |
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| 95 | motor_X.setSpeed(25600); |
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| 96 | motor_X.enableOutputs(); |
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| 97 | } |
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| 98 | </code></pre> |
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| 99 | 11 | Frédéric Blanc | |
| 100 | https://wiki.fysetc.com/TMC2208/ |