BRAND: Communica

GRBL Compatible-CNC Shield to Drive 4x Ramps A4988 Stepper Driver Boards

CNC Shield V3 3D Printer Expansion Board


CNC Shield V.3 expansion board Can be used for engraving machines, 3D printers. Can drive four A4988 stepper motor and 6 IO ports can be use


Expansion Board Pin-out Definition:

  • 8 ----------------------- EN ( stepper motor driver enable, active low )
  • 7 ----------------------- Z.DIR (Z -axis direction control )
  • 6 ----------------------- Y.DIR (Y -axis direction control )
  • 5 ----------------------- X.DIR (X -axis direction control )
  • 4 ---------------------- Z.STEP (Z -axis stepper control )
  • 3 ---------------------- Y.STEP (Y -axis stepper control )
  • 2 ---------------------- X.STEP (X -axis stepper control )
    • GRBL 0.8c compatible. (Open source firmware that runs on an Arduino UNO that turns G-code commands into stepper signals)
    • 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)
    • Spindle enable and direction
    • Coolant enable
    • Uses removable Pololu A4988 compatible stepper drivers. (A4988, DRV8825 and others)
    • 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 Pololu DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.)

Additional Information

Device Expansion Board
Type CNC | Shield | V3 | 3D | Printer