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📘 How does an elevator know where to stop?

Follow ropes, counterweights, sensors, brakes, and control logic through a precise elevator stop.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

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What you’ll learn

Traction
Position
Acceleration
Leveling
Door interlock
Counterweight
Braking
Calls and logic
Load sensing
The complete stop

Questions this course answers

What does the counterweight do?

The counterweight offsets the empty car and part of its rated load.

Why does an elevator use position feedback?

Sensors tell the controller where the car is and whether its motion profile is being followed.

What is leveling?

Leveling brings the stopped car flush with the building floor.

Why must door interlocks prove the doors locked before travel?

Interlocks remove run authorization unless the doors are closed and locked.

What happens in a spring-applied, electrically released brake when release power is lost?

The fail-safe arrangement uses springs to apply braking when release power is absent.

Grounded in trusted sources

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Every Wunder lesson is built from real, reputable sources — never invented.

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