CNC shield V3 for Engraving Machine 3D Printer A4988 DRV8825 driver expansion board

The CNC shield V3 is a low-cost controller solution for DIY CNC machines. It was designed to be 100% compatible with Grbl, which is Open source G-Code interpreter, and fit onto the popular Arduino Uno. This Grbl interpreter can convert the G-code instruction to Stepper instruction. This CNC Shield can be used to control the various types of CNC machines, like CNC milling machines, laser engraving/cutting machines, drawing machines, 3D printers or any project that needs precision control of stepper motors. It uses Pololu and compatible stepper drivers, either the A4988 or the higher current DRV8825. Features  This CNC Shield is Arduino UNO Compatible 14 digital input/output pins – 6 pins can be used as PWM outputs 6 analog inputs 16 MHz crystal oscillator Operates at 5V Recommended input voltage range: 7V to 12V Flash Memory: 32 KB (0.5KB used by bootloader) SRAM: 2KB EEPROM: 1KB  CNC Shield 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 – each axis pair shared by same IO pin) Spindle enable and direction connection Coolant enable connection Uses GRBL as control software(A open source  platform) Package Includes : 1 x CNC shield V3 engraving