Hello friends
This project is a rotary module for engraving parts with cylindrical surface in laser engravers. You can make this module at home by following the instructions in the video.

Youtube: https://youtu.be/sFxr2KoI-Ho

Materials
3 GT2 pulleys (hole size Ø5) : https://alishort.com/aqXzF
1 GT2 without teeth pulley (hole size Ø5) : https://alishort.com/jMiqe
4 number 625 bearings : https://alishort.com/eNavN
2 pcs Ø5x250 mm shaft : https://alishort.com/krRuO
2 pieces 20x20x210 mm sigma profile : https://alishort.com/87TIe
1 stepper motor : https://alishort.com/2H5Kq
Some GT2 belts : https://alishort.com/e6Yhm

This rotary module was designed by myself in computer environment.
The design consists of a stepper motor and two shafts rotating with a belt and pulley system.
Silicone hoses on the shafts ensure that the rotating part does not slip. If you have a 3d printer, you can make this design at home.
When you make this module, you need to remove the Y-axis stepper motor cable of your laser engraver and connect it to the module.