This is the third version of my DIY homemade CNC machine. Instead of using threaded rods I'm now using (GT2) belts and it has a larger working area of 50x70 cm or 20x27 inch. By using belts it's also faster. To get a better understanding of the machine, also check the previous version here:

   • Homemade CNC with 3D Printed Parts - ...  

I've designed the machine with Fusion 360 and also used Inkscape for the drilling template. To control the machine I'm using an Arduino UNO with GRBL firmware and an Arduino CNC Shield. There are plenty of tutorials to find on how to connect and use it so I did not show it in the video. Here are some useful links:

* [GRBL](https://github.com/gnea/grbl)
* [Arduino CNC Shield](https://blog.protoneer.co.nz/arduino-...)

If you want to build one yourself you can download all the necessary files on GitHub.

GitHub link:
https://github.com/leonvandenbeukel/C...

The 3D printer I use is an Anet A8. The parts are printed with PLA, mostly 20% infill and 0.2 or 0.4 setting. Use higher infill for parts that must be stronger, for example the stepper motor mounts.

Dimensions:
The tubes are 20mm x 20mm (0.78") square steel tubes. The length of the Y Axis tubes is 1000mm (40") and the length for the X Axis is approx. 820mm (32"). As an alternative you could also use other dimensions than 20mm x 20mm (maybe even rounded tubes) as long as they are approximately that size. The Z axis tubes are 15mm x 15mm (0.59") aluminium square tubes, approx. 215mm long (8.5"). You should measure this for yourself, check the video build. For the belts I'm using GT2 6mm and pulleys.

The effective working area is 50 x 70 cm (20" x 27").

To power the NEMA 17 stepper motors I've converted an old ATX PC power supply and used the 12V output. The type of stepper motors I use for the Y- and Z axis are: 17HS19-2004S1, the type for the X axis is: 42BYGHW811. For the wiring I've used CAT5 network cable.

Software that I mostly use to generate and send GCode:

* bCNC (https://github.com/vlachoudis/bCNC)
* Universal Gcode Sender (https://github.com/winder/Universal-G...)
* Easel by Inventables (http://easel.inventables.com)
* Fusion 360 with CAM (https://www.autodesk.com/products/fus...)

Contact:
Website: https://www.leonvandenbeukel.nl
GitHub: https://github.com/leonvandenbeukel