A later comment points out a microwave that does this (also the one ricardobeat mentioned):
»My 1990’s Sanyo Microwave has a “boomerang turntable”, meaning the turntable always returns to its starting point. It turns for a few seconds after the oven stops, until a micro-switch, driven by a cam on the shaft, is tripped.
The period or revolution happens to be exactly 12 seconds. (Has a synchronous motor?) I know this because any multiple of 12 seconds means the turntable stops immediately.«
A later comment points out a microwave that does this (also the one ricardobeat mentioned):
»My 1990’s Sanyo Microwave has a “boomerang turntable”, meaning the turntable always returns to its starting point. It turns for a few seconds after the oven stops, until a micro-switch, driven by a cam on the shaft, is tripped.
The period or revolution happens to be exactly 12 seconds. (Has a synchronous motor?) I know this because any multiple of 12 seconds means the turntable stops immediately.«