(SKU:RB-01C049)A4988 Stepper Motor Driver Carrier

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RB01C04901.png

Contents

Product introduction

The A4988 stepper motor driver carrier is a breakout board for Allegro’s A4988 microstepping bipolar stepper motor driver. The driver features adjustable current limiting, overcurrent and overtemperature protection, and five different microstep resolutions (down to 1/16-step). It operates from 8 – 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient additional cooling). This product is a carrier board or breakout board for Allegro’s A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection; we therefore recommend careful reading of the A4988 datasheet (380k pdf) before using this product. This stepper motor driver lets you control one bipolar stepper motor at up to 2 A output current per coil (see the Power Dissipation Considerations section below for more information). Note that we carry several stepper motor drivers that can be used as alternatives for this module. The Black Edition A4988 stepper motor driver carrier is available with approximately 20% better performance; except for thermal characteristics, the Black Edition and this (green) board are interchangeable. We also sell a larger version of the A4988 carrier that has reverse power protection on the main power input and built-in 5 V and 3.3 V voltage regulators that eliminate the need for separate logic and motor supplies. Our DRV8825 carrier offers approximately 50% better performance over a wider voltage range and with a few additional features, while our DRV8834 carrier works with motor supply voltages as low as 2.5 V; either of these boards can be used as a drop-in replacement for this driver in many applications.

Technical parameters and performance

  1. Product name: A4988 Stepper Motor Driver Carrier
  2. Article number: RB-01C049
  3. Working voltage range: 8V-35V
  4. It can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient additional cooling.
  5. Logic supply voltage: 3V-5.5V
  6. Five different microstep resolutions (down to 1/16-step)

Method of use

Circuit schematic diagram

RB01C04903.jpg

Hardware connection

Power connections: The driver requires a logic supply voltage (3 – 5.5 V) to be connected across the VDD and GND pins and a motor supply voltage (8 – 35 V) to be connected across VMOT and GND. These supplies should have appropriate decoupling capacitors close to the board, and they should be capable of delivering the expected currents (peaks up to 4 A for the motor supply).

RB01C04902.png

Application of routine

sample code

int dirPin = 8; 
int stepperPin = 7; 
void setup() 
{   
  pinMode(dirPin, OUTPUT); 
  pinMode(stepperPin, OUTPUT);
  }  
  void step(boolean dir,int steps)
  {  
    digitalWrite(dirPin,dir); 
delay(50); 
 for(int i=0;i<steps;i++)
{ 
   digitalWrite(stepperPin, HIGH);    
      delayMicroseconds(800); 
   digitalWrite(stepperPin, LOW);    
      delayMicroseconds(800);  } 
} 
void loop()
{ 
 step(true,1600);   
 delay(500); 
 step(false,1600*5);  
  delay(500); 
}

Application effect

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Purchase link

A4988 Stepper Motor Driver Carrier

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Related documents

Allegro A4988 stepper motor driver datasheet
Allegro A4988 stepper motor driver datasheet(Chinese version)
ALSrobot Maker Forum

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