Arduino Boards & Compatibles

Arduino CNC Shield V3 GRBL Compatible Stepper Driver Expansion Board

The Arduino CNC Shield V3 GRBL Compatible Stepper Driver Expansion Board is a compact motion-control shield for makers, engineering students and DIY CNC builders who want to convert an Arduino UNO-based setup into a practical G-code controlled machine controller. Designed as an Arduino shield, it is commonly used for mini CNC routers, engraving machines, DIY laser cutters, 3D-printer style motion platforms and other projects that need coordinated stepper-motor control. The board accepts Pololu-style plug-in stepper driver modules such as A4988 and DRV8825, letting users choose the driver module based on their motor current requirement and cooling arrangement. When used with GRBL firmware, the CNC Shield V3 provides a low-cost route into CNC control without needing a parallel-port controller or expensive motion card. GRBL is widely used in hobby CNC because it accepts standards-compliant G-code, making it suitable for workflows involving common CAM and sender software. The shield layout provides convenient headers for stepper drivers and machine-control wiring, helping reduce jumper wiring errors in student projects and lab prototypes. It is also referenced in GRBL v0.9-compatible CNC shield guides and supports motion-control features such as PWM spindle control and soft-limit based workflows when configured correctly in firmware. This listing is for the CNC Shield V3 expansion board only. Arduino UNO, A4988/DRV8825 driver modules, stepper motors, power supply and wiring accessories should be selected separately according to your machine design.