Some of these watches, such as chronographs, contain more than one stepping motor.
From the en.wikipedia.org
The stepping motor is controlled by pulses from a sensor which detects each swing of the pendulum.
From the newscientist.com
The camera was fixed to a separate stepping motor that was synchronized to move with the edge of the right platform.
From the nature.com
Switching off motor neurons more quickly, speeds up the stepping movements, allowing animals to walk, run, or swim faster.
From the sciencedaily.com
If the stepping frequency matches the resonant frequency then the ringing increases and the motor comes out of synchronism, resulting in positional error or a change in direction.