1.This shield is ideally suited to converting a simple electronic components for Arduino into a CNC machining workhorse. The module provides 3 axis of control along with connections for limit switches, spindle control, coolant control and hold buttons. The board is based on the well documented open source prontoneer design.

2.The shield is designed to accept A4988 drivers. Each drivers step settings can be controlled via the onboard jumper connections. To power the motors a 12V DC supply is required which is then connected to the screw terminals. The logic on the otherhand is powered from itself.