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Motor

Overview

The component MOTOR is a stepper driver for DRV8824/25 and A4988 breakout boards

Example

An example project for the Arduino IDE is provided in BasicStepperDriver.ino (download here)

ESP Board motor
SW304,SW305

Activating the component

The component has two dip switches SW304 and SW305 for activating the component.

Function SWITCH IO port Conflicts with Remarks
DIR SW304-1 33 RGB LED, SW313, DIN; TFT, SW314, T_DO; mikroBus, SW405-6, AN
STEP SW304-2 23 RFID, SW303-4, MOSI; TFT, SW311-4, MOSI; TFT, SW314-4, T_DIN; mikroBus, SW405-1, MOSI

The four switchs of SW305 are connected to GND. The functions are as follows:

Function SWITCH
CFG3 SW305-1
CFG2 SW305-2
CFG1 SW305-3
EN SW305-4

Connect a stepper motor on J301.
Motor connection from left to right:

Function SWITCH
GND external motor power supply
VCC external motor power supply
2B motor coil 2
2A motor coil 2
1A motor coil 1
1B motor coil 1

Using the component

You have to switch on SW304. Depending on your motor driver, you may need to turn on Enable (switch 4 of SW305).

Setup the component

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#include <Arduino.h>
#include <BasicStepperDriver.h>

// Motor steps per revolution. Most steppers are 200 steps or 1.8 degrees/step
#define MOTOR_STEPS 200

// All the wires needed for full functionality
#define DIR 33
#define STEP 23

// Since microstepping is set externally, make sure this matches the selected mode
// 1=full step, 2=half step etc.
#define MICROSTEPS 16

// 2-wire basic config, microstepping is hardwired on the driver
BasicStepperDriver stepper(MOTOR_STEPS, DIR, STEP);

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void setup() {
    /*
    * Set target motor RPM.
    * These motors can do up to about 200rpm.
    * Too high will result in a high pitched whine and the motor does not move.
    */
    stepper.setRPM(100);
}

Control the servo

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void loop() {

    // energize coils - the motor will hold position
    // stepper.enable();

    /*
    * Tell the driver the microstep level we selected.
    * If mismatched, the motor will move at a different RPM than chosen.
    */
    stepper.setMicrostep(MICROSTEPS);

    /*
    * Moving motor one full revolution using the degree notation
    */
    stepper.rotate(360);
    delay(1000);

    /*
    * Moving motor to original position using steps
    */
    stepper.move(-200*MICROSTEPS);

    // pause and allow the motor to be moved by hand
    // stepper.disable();

    delay(1000);
}

Sample project

A sample project for the Arduino IDE is provided in BasicStepperDriver.ino (download here).