CNC Shield UNO-R3 Board 4xA4988 Driver Kit With Heat Sink ForEngraver 3D Printer

CNC Shield Board:

Version: 3.0

Color: Red

Size(L*W*H): 68 x 53 x 18 mm

Voltage: DC 12~36 V (At the moment only the DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.)

Features:

1. Uses removable A4988 or DRV8825 compatible stepper drivers.

2. The extension board can be used for carving machine, 3 d printer driver expansion board

3. GRBL 0.8 compatible. (Open source firmware that runs on an -UNO that turns G-code commands into stepper signals)

4. PWM Spindle and direction pins,4-Axis support (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13)

5. Compact design. Stepper Motors can be connected with 4 pin molex connectors or soldered in place.

6. Please note that this is an unassembled kit and Basic soldering skills are needed.

A4988 Stepper Motor Driver:

Color: Red

Size(L*W*H): 20 x 15 x 10 mm

Thermal shutdown circuitry: Yes

Crossover-current protection: Yes

Ground fault protection: Yes

Load short-circuit protection: Yes

Compatible logic supply: 3.3V and 5 V

Five selectable step modes: full, 1/2, 1/4, 1/8 and 1/16

Features:

1. Mix with slow current decay modes.

2. Internal UVLO and Low RD5 (On) Output.

3. Automatic current decay mode detection/selection.

4. Synchronous rectification for low power dissipation.

5. Warning: Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver.

Uno R3 Board:

MCU: ATmega328

Clock speed: 16 MHz

USB interface: ATmega16U2

Operating voltage: 5 V

I-I / O pin output current: 40 mA max

3.3 V output current: 150 mA max

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