Tangential Oscillating Cutting Knife

The tangential oscillating cutting knifes (TOCK) are used for cutting cardboard, rubber, plastic films, etc. They use a sharp edge knife which is moving (oscillating) in vertical direction and in the same time can be rotated to follow the tangent of the curve.
The oscillation of the knife up/down is done through a DC motor from some old ink jet printer, the rotation of the knife is done through stepper motor.
Normally the price of the TOCK is exceeding 1200 EUR and here you can make fully functional TOCK for less than 80 EUR on your 3D printer.

You'll need a CNC machine or router to connect the TOCK head, also one additional axis to control the rotation.

Here you can find a complete documentation how to build such TOCK by using 3D printer.

Video in YouTune showing how TOCK works on cardboard for making boxes (notice the smooth cutting of rounded shapes)
https://www.youtube.com/watch?v=9aJhzyOltiY

Attached is also the program which takes PLT and converts it into GCode wi