What does this wheel do?

[Jon Bang]

Jon
It's the sound drum, inside is a flywheel. The latter to give steady sound.


Maurice

Ok thanks. That makes sense :-)

[Maurice Leakey]

Jon
It's the sound drum, inside is a flywheel. The latter to give steady sound.


Maurice

[Jon Bang]

What does this big wheel do? Do i need it if i build a frame-by-frame scanner? On the other side it looks like the optic sound is, see picture....