CNC Shield V.3 expansion board

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.)

Package includes:

1 X CNC Shield V.3 Expansion Board