- 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:

• Uses removable A4988 or DRV8825 compatible stepper drivers.
• The extension board can be used for carving machine, 3 d printer driver expansion board
• GRBL 0.8 compatible. (Open source firmware that runs on an Arduino UNO that turns G-code commands into stepper signals)
• 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)
• Compact design. Stepper Motors can be connected with 4 pin molex connectors or soldered in place.
• Please note that this is an unassembled kit and Basic soldering skills are needed.

A4988 Stepper Motor Driver

• Color: Green
• 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 RDS (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: CH340
• 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)
• Analog input pins: 6
• EEPROM: 1 kB
• Static RAM (SRAM): 2 kB
• Flash memory: 32 kB
• Size(L*W*H): 68 x 53 x 10 mm

Package included:

• 1 x Uno R3 Board
• 1 x CNC Shield Board
• 4 x A4988 Stepper Motor Driver
• 4 x Heat Sink
• 1 x USB Cable
• 1 x 40-Pin Row Needles