CNC Arduino / Grbl Shield stack w/ 60mm fan

by AndrewBCN, published

CNC Arduino / Grbl Shield stack w/ 60mm fan by AndrewBCN May 13, 2015
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This is an Arduino Uno + Grbl Shield + Stepper Driver + 60mm fan stack.

I have remixed/customized my earlier design for an Arduino Mega 2560 slide-in holder and also the MOAB fan bracket for this setup which can be used to drive a small CNC such as the Shapeoko.

The 60mm fan provides the required airflow to run the stepper drivers at or near their maximum current rating (theoretically up to 2.5A for the DRV8825 stepper drivers, but realistically around 2A) without fear of thermal shutdown.

The OpenSCAD source code is provided so the thing can be further remixed. License is GPLV3.


Here shown printed in Green PLA with 35% infill.

Note that the slide-in holder should be mounted vertically so that the Arduino Uno slides in from the top, with the USB connector facing down.

The fan brackets require 4 x M3 16mm hex screws and nuts.

The slide-in holder is designed for wood screws but can also be used with M5 screws.

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I think this will be perfect for my Root 2 CNC router since I have decided to use the CNC Shield instead of the RAMPS board like the creator reccomends.

You forgot to mention the SCAD Files - which is very welcome !

  • so I will try it with a MEGA2560 and RAMPS Board…

Just made one. Fits perfectly well. +++

What CNC design are you building?

I have not finalized yet my choice of a design. I want to build a CNC router for wood, plastics, MDF and other soft materials. Something more or less twice the size of a Shapeoko 2, and using trapezoidal screws (not GT2 belts).