The CNC Shield V3 is an expansion board designed for Arduino. It facilitates the control of stepper motors and other components in CNC (Computer Numerical Control) machines. This shield provides slots for stepper motor drivers and includes connections for limit switches and other peripherals, making it an essential component for DIY CNC projects and automation systems.
 
Technical Specifications
Operating Voltage: 12-36V DC
Stepper Motor Drivers: Supports up to 4 (typically A4988 or DRV8825)
Input Connectors: Provision for Endstops (Limit switches)
Compatibility: Designed to fit Arduino UNO R3 and similar boards
 
Pin Configuration and Descriptions

Pin Number           Function                               Description
  A0-A5                     Endstops                             Input pins for connecting limit switches
  D8-D10         Stepper Motor Control (X)      Control signals for the X-axis stepper motor driver
  D2-D4           Stepper Motor Control (Y)       Control signals for the Y-axis stepper motor driver
   D5-D7            Stepper Motor Control (Z)      Control signals for the Z-axis stepper motor driver
   D12-D13        Stepper Motor Control (A)    Optional control signals for a second Z-axis or other motor
     GND                                Ground                           Common ground for logic and power
       VIN                        Voltage Input         Input voltage for the shield, passed through from Arduino UNO