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📘 Ropes and a sheave move the car

Traction ropes, a grooved sheave, and a counterweight turn motor torque into car motion.

3
lessons
~15 min
to learn
Adults
level
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What you’ll learn

  1. Motion and positioningExplain traction drive, position feedback, acceleration profiles, and leveling.The controller compares measured motion with stored floor targets and safe profiles.
  2. Safety systemsConnect door interlocks, counterweight balance, brakes, and governors to safe stopping.Independent mechanical and electrical conditions must agree before normal service continues.
  3. Controller decisionsDescribe call scheduling, load sensing, and the complete stop sequence.Every permission to move depends on a collection of valid inputs and safety circuits.

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.

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