Electric sander, grind metal surface
Floor sander, turn on, run, turn off, short
Belt sander, 3 inch by 18 inch, turn on, run, turn off
Palm sander. Motor turn off and on.
Belt sander. Turn on, sands wood then turned off.
5 inch random orbit orbital sander on, sand at high speed and off
5 inch random orbit orbital sander on, idle, medium speed and off
Belt sander, on idle variable and off
Orbital sander on, sand and off
Sander on, sand hardwood with swipes, then off