CNC Shield A4988 Base Board

C003

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CNC Shield Board:

Latest Arduino CNC Shield Version 3.0
GRBL 0.9 compatible. (Open source firmware that runs on an Ard-uino 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)
2 x End stops for each axis (6 in total)
Coolant enable
Uses removable A4988 or DRV8825 compatible stepper drivers
Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping )
Compact design.
Stepper Motors can be connected with 4 pin molex connectors or soldered in place.
Runs on 12-36V DC. (At the moment only the DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.)
Please note that this is an unassembled kit and Basic soldering skills are needed

A4988 Stepper Motor Driver:

A4988 Stepper Motor Driver Board is a breakout board for Allegro’s A4988 DMOS Micro stepping Driver with Translator and Overcurrent Protection; please read the A4988 datasheet carefully before using this product.

Low RDS (On) Output

Automatic current decay mode detection / selection

Mix with slow current decay modes

Synchronous rectification for low power dissipation

Internal UVLO

Crossover-current protection

3.3 and 5 V compatible logic supply

Thermal shutdown circuitry

Ground fault protection

Load short-circuit protection

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

Warning: Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver. (More generally, rewiring anything while it is powered is asking for trouble).

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