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20-Jul-2017 15:14

I had to mount my Arduino board first with a couple of screws (into the screw bosses from the old board) before attaching the CNC Shield. It accepts the A4988 or the DRV8825, the later being more powerful and able to accept up to 36volts and 1/32 microstepping. Before installing the driver chips, you have to decide how many micro steps you want to have your machine run at.Rule of thumb is, the more micro steps, the smoother the motions, but lower the torque.You'll recognize this since it will have a control board and dial to control the spindle speed.--If you forget the label the XYZ cables, don't worry, just follow them to the ports on the back and you can see which is which. GRBL is an open source G-Code interpreter, it is to CNC machines as Marlin firmware is to 3D printers.The range of these models makes for choosing the right one for your shop pretty easy, the more expensive and larger ones (typically 30) will have the more accurate ball screw type linear movements instead of a typically trapezoidal lead screw.

Signal pulses will be sent from the Mach 3 software to the port and that drives the motors and makes the CNC machine come alive.

The installer is compatible with Windows 7, Windows XP and Windows Vista.