PACKAGE CONTENTS

5 x A4988 Stepper Motor Driver Module (with pre-soldered pins)

5 x Aluminum Heatsink



SPECIFICATIONS

Driver Chip: A4988

Module Dimensions: 1.5mm x 2mm

Operating Voltage: Up to 35 V

Output Drive Capacity: ±1.2 A Continuous

Maximum Drive Current: 2 A (with heatsink and adequate cooling)

Microstep Resolutions: Full-step, 1/2-step, 1/4-step, 1/8-step, 1/16-step

Control Interface: Step and Direction

Protection Features: Over-Temperature Thermal Shutdown, Under-Voltage Lockout, Crossover-Current Protection



USAGE INSTRUCTIONS

1. Precaution: Always handle the modules with anti-static precautions to prevent damage from electrostatic discharge.

2. Set Current Limit: Before connecting the motor, use the onboard potentiometer to adjust the reference voltage (Vref) to set the current limit appropriate for your stepper motor. This prevents overcurrent damage.

3. Install Heatsink: Peel the backing from the thermal adhesive and firmly press the heatsink onto the top of the A4988 chip.

4. Make Connections: Connect your logic and motor power supplies. For normal operation, ensure the RESET and SLEEP pins are connected together or pulled high.

5. Connect Motor: Connect your stepper motor. IMPORTANT: Do not connect or disconnect the motor while the driver is powered on.



APPLICATION SCENARIOS

- 3D Printer Repair and Upgrades: A perfect drop-in for standard stepper drivers in a wide range of RepRap-style 3D printers. Ideal for fixing a failed axis or building a custom machine.

- Desktop CNC and Engraving: Reliably drives the stepper motors for X, Y, and Z axes on hobbyist CNC routers, laser engravers, and milling machines, enabling precise control for detailed work.

- Robotics and Automation Projects: Build custom robotic arms, sliders, and other automated systems requiring accurate positional control of small to medium-sized stepper motors.

RELIABLE STEPPER MOTOR CONTROL: The A4988 driver module provides a simple and dependable solution for precise stepper motor control. Featuring a straightforward step and direction interface, it is a proven choice for DIY 3D printer builds, CNC machine upgrades, and other automation projects.
VERSATILE MICROSTEPPING RESOLUTIONS: Fine-tune your motor's performance with five selectable step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step. This flexibility allows for smoother, quieter motor operation and increased positioning accuracy for high-quality prints and engravings.
ADJUSTABLE CURRENT & THERMAL PROTECTION: Safely power your motors by setting the maximum current output with the onboard potentiometer. Integrated protection circuits guard against over-temperature thermal shutdown, under-voltage lockout, and crossover-current, while the aluminum heatsinks help dissipate heat for improved stability.
INTELLIGENT POWER MANAGEMENT: This driver features intelligent chopping control that automatically selects the optimal current decay mode (fast or slow decay) to achieve the best performance. It supports a wide motor power supply range up to 35 V and delivers a drive capacity of up to ±1.2 A continuous current per phase.
BROAD COMPATIBILITY FOR DIY PROJECTS: Designed for wide-ranging use, this driver is with popular control boards like RAMPS and is a direct for drivers in many 3D printers, including Prusa Mendel, Ultimaker, Printbot, and Makerbot models. We provide comprehensive after-sales : complete digital documentation including user guides and technical references is available through , and our team is ready to assist with installation, programming, and troubleshooting to help you started quickly.