There was a mountain of packages that occupied a whole drawer in the kitchen. And now there is a small box with packages. The whole secret is to roll packages with a simple device.
The author of the idea is Andrey Shayter https://www.youtube.com/watch?v=HEacniKGmWM
Simplified version from Steve Genom https://www.youtube.com/watch?v=1tVot6UQgAQ
The 3D model of the fan is very simple, easily wound on a collet clamp. I put it on my CNC machine. The first launch proved to be very good, all the chips are scattered to the sides, clean under the cutter.
For my daughter, I printed a little Wally made of plastic, she is crazy about this toy, especially since dad made a toy.
Bowden extruder for a 3D printer with minimal gaps and no extra parts. An eccentric is provided for compressing the spring and releasing the filament rod.
This is my first CNC machine assembled with my own hands from available materials. The cost price of the machine is about $170.
I need a tachometer to calculate some mechanisms. For example, to calculate the speed of a robot vacuum cleaner, you need to know the rotation speed of the electric motor and, based on this, calculate the gear ratio of the gearbox.