DIY 3D Tech

The On-Line Magazine for 3D Printing & CNC

3040 CNC – Converting to GRBL with LPT DB25 G25 USB Adapter!

Please visit for more information on this and many other projects! As in this episode, we will be converting the 3040 CNC machine we purchased from eBay to use GRBL by simply adding a LPT DB25 G25 USB Adapter to the Arduino UNO ( This is a very simple and easy way to convert a 3020, 3040 or 3060 (in fact any parallel port / Mach 3 type machine) to GRBL!

Arduino GRBL CNC Shield kit for router / engraver LPT db25 G25 usb adapter:

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