Wheel rotators must be used with wheels in the projector.
There are three speeds of wheel rotators for liquid, pattern, clear and distortion wheels:
The 5 RPM rotator, for fast moving images.
The ½ RPM rotator, for most uses. Shows clear movement of projected images.
The ultra slow rotator, for story telling and talking about the images
Wheel safe rotator has a metal casing and is best for protecting liquid wheels which are made of glass and are therefore fragile. (Does not fit Solar 100 projector)
Cassette rotator for animating pattern cassettes.