UNO CNC Machine Expansion 3D printer A4988 Driver Board

CNC Shield Board:

1.The newest CNC Shield Version 3.0 for Arduino.

2, GRBL 0.9 compatible. (Open source firmware that runs on UNO for Arduino which converts G-code commands into stepper-signals,)

3, PWM Spindle and pin direction

4,4-Axis support (X, Y, Z, -Can duplicate X, YZ or the full 4th axis with custom firmware using pins D12 and D13)

5,2 x End stops for each axis (6 total)

6, cooling allows

7, using the detachable A4988 or DRV8825 compatible stepper driver

8, jumpers for Micro Stepping for stepper drivers. (Some drivers like DRV8825 can do 1/32 micro step)

9, compact design.

10, Stepper Motor can be connected with 4 pin molex connector or soldered in place.

11, runs on 12-36V DC. (Currently only the DRV8825 driver can handle up to 36V so please consider the operating voltage when powering.)

12, Please note that this is an unassembled kit and basic soldering skills are required.

A4988 Stepper Motor Driver:

1 a4988 Stepper Motor Driver Board is a breakout board for Allegro’s A4988 DMOS Micro Stepping Driver with Overcurrent Translator Protection; Please read the A4988 data sheet carefully before using this product.

Low RDS (In) Output

2, automatic current decay detection mode / selection

3, mix with the current slow decay mode

4, synchronous rectification for low power dissipation

5 Internal UVLO

6, Crossover-Current Protection

7,3.3 and 5V compatible logic supply

8, Thermal closure circuit

9, ground fault protection

10, Load short circuit protection

11, five selectable steps modes: full, 1/2, 1/4, 1/8 and 1/16

UNO R3 Board for Arduino:

MCU: ATmega328

USB interface: ATmega16U2

Operating voltage: 5V

Digital I / O pins: 14 (including 6 with PWM capability)

Analog input pin: 6

II / O pin output current: 40mA max

3.3V output current: 150mA max

Flash memory: 32kB (0.5kB used by bootloader-included)

Static RAM (SRAM): 2kB

EEPROM: 1kB

Clock Speed: 16MHz