How to make something that makes almost anything - 2012
Yoav sterman
The Multi Processes Lathe - 3D copy machine
The Concept
The multi Processes Lathe is an attempt to unify and combine the three digital manufacturing processes: additive manufacturing, subtractive manufacturing and 3D scanning. Each of these processing are separate, utilize its own machines and software. Today, for scanning an object and then produce it, you need to scan the object with a 3D scanner, use a special software to heal and prepare the file, and then send it to a 3d printer or milling machine using another software (at least one) . The multi Processes Lathe offers a solution that uses only one machine and not involve any software at all (on the user side), it is a simple “plug and play” device (or scan and mill), all the user need to do is to load the object to the machine, and replace it with a piece of foam (or other raw material), and press two buttons. The lathe has a mill bit that can be replaced with a scanning bit, and the printer head itself can be easily replaced with a 3D printer head, using the unique snap-fitted clips. In addition, the lathe is can also become a regular 3 axis 3D printer or milling machine once a moving platform is positioned on its bottom.
live duplication
The lathe can live duplicate an object by replacing the milling head with a scanning and milling head and setting both the scanned object and the row material on the rotating axis. The process is inspired by key duplication machines that scan a key and mill a blank key in a “blind” way. This two dimensional process is converted to a 3D and automatic process.

Technical information
The lathe controlled by an Arduino Uno.
The motion control is done by the MTM snap gerblshield.

The arduino software counts motor steps and sends it via serial port to the processing script.
The processing scripts save the steps (z steps, x steps and y steps ) into a XML file. The software also generate a visualization of the object (this part need some more work). When milling, the code pulles the steps from the xml file and sends it back to the arduino.

    The code will be uploaded in the future…
    The code will be uploaded in the future…

The design of the lathe is relying only on known and accurate dimensions. The reliable dimensions are the HDPE thickness, the cuts of the Shopbot on the x and y axis, and the ordered parts (such as the shafts and bearings). By elimination not accurate dimensions or assemblies with high tolerances the design can be accurate and there is no need for thermal relaxation of the shafts.

    Soild works/pathworks files will be uploaded in the future

• Special thanks to Nadya Peed for her help.

Project goals
The evolution of the machine design
Ouija board
Snap–fits development