A decent 3D printer can be had without mortgaging a small country, and the honor roll of CNC router builders is long and distinguished. But there is still plenty to surprise us in CNC, and [Fabien ...

Unwilling to deal with the accumulation of chips in the expensive ball screws of his homemade CNC router, [Nikodem Bartnik] took matters into his own hands and created these DIY telescopic ball ...