This machine has a fascinating architecture and is a joy to watch. It uses simple inexpensive common parts, and despite the complex looking frame is fairly easy to put together and get up and running. It gives the maker the ability to not only create new parts but also duplicate them.
The X axis is using a small bipolar stepper motor attached to a leadscrew for carriage movements.
The cutting tool motor(5$) has a small chuck(2$) to hold 1/8 inch rotary tool bits and sanding drums to do the carving.
The motors are all driven using off the shelf speed controllers to accommodate various woods. It looks rather complicated as far as wiring, but its all very straight forward.
When running it looks like a living organism. Each motor is moving when and as it should and as material is removed the part takes shape.
It does make a bit of a dusty mess but containable. Does not make too much racket, mostly just the cutting motor. The printed parts consumed 250 meters of filament. The full set of mechanical/electronic parts cost about 25$. The base is acrylic and has a footprint of 16" X 5 " although some parts of the machine do overhang. This was by design to keep shavings from falling into the X axis lead screw below.
I have found that on softer woods a 1/4 inch band sanding drum works great and makes a satin smooth finish on parts. Maximum stock size for this machine is 2" square X 8 inches long.
This machine is scaleable-It can be made larger.
My goal is as always to design and make inexpensive 3D printed machines that make.