Features:
<br />Brilliant 3D Printer Accessories Set meets most needs.
<br />Including CNC Shield V3.0, UNO R3 Board, A4988 StepStick Stepper Motor Module.
<br />The 3D printer stepper motor shield V3 can be used as driver expansion board for engraving machines and 3D printers.
<br />It has in total 4 channel slots for A4988 stepper motor driver modules for driving 4 channel of stepper motors. Each channel of stepper motor only needs 2 IO ports, which means 8 IO ports is sufficient to manage 3 stepper motors. This shield can make quick work for managing stepper motors in your project.
<br />
<br />GRBL 0.9 compatible. (Open source firmware that runs on an Arduino UNO that turns G-code commands into stepper signals)
<br />Uses removable Pololu A4988 compatible stepper drivers.
<br />PWM Spindle and direction pins
<br />4-Axis support (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins A4 and A3)
<br />2 x End stops for each axis (6 in total)  + one Probe
<br />Coolant enable output
<br />Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping)
<br />Stepper Motors can be connected with 4 pin molex connectors or soldered in place.
<br />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.)
<br />Please note that this is an un-assembled kit and needs soldering.
<br />
<br />Note: When inserting the A4988 module, must be careful not to insert reversely.
<br />
<br />Stepper motor wiring as follows:
<br />2A, 2B is a group (red, green), 1A, 1B is a group (blue, yellow), if want to change direction, can be change the position of one group, for example 2A, 2B mutually exchanged.
<br />
<br />Package Includes:
<br />1 x CNC Shield V3.0 for Arduino
<br />1 x UNO R3 Board for Arduino
<br />4 x A4988 Driver Module with Heatsink for Arduino