We have featured a few DIY low cost milling machines before and here’s another superb one to add to our collection. With DIY CNC milling machine projects, the trade off is between cost of fabrication and the precision with which it operates. So, if your budget is around $100 and you don’t need precision down to a thousandth of an inch, then this 3-axis milling machine is perfect.
This 3-axis CNC machine can plot and cut PCBs, wood, and even mild steel with precision that’s around 10-15 mils. As the pictures show, the precision may differ with the gauge of the mill used for different materials.
The CNC machine is contained in a wooden box with the three axes moving smoothly along precision steel rods. The open source EMC2 controls the design movements of the CNC machine. The schematics and the assembly instructions give an idea of how the machine is put together.