Catalog > Internet of Things (IOT) Related Products > More Platforms CNC Shield V3 3D Printer Expansion Board CNC Shield V3 3D Printer Expansion Board HKD CNC GRBL SHIELD GRBL Compatible-CNC Shield to Drive 4x Ramps A4988 Stepper Driver Boards 39.65 ZAR inc for 1 Each 9 in Stock Add Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview 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 Features 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 directionCoolant enableUses 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.)