wHow do elevators move to the same exact spot every single time the button is pressed?

Question

I work in a hotel and ride elevators upwards of 50 times a day. Never once has the bottom of the elevator been even a fraction of an inch above or below the floor where the elevator begins. Assuming there is a minimal amount of slippage in the cabling, how do the elevators move the exact same distance every single time? Is there some sort of cable/feet math going on where each floor is x amount of motor turns?

In: Engineering

Answer 1

You are way overthinking this. It just counts floors. Floor height is standardised by building regulations, as are elevator shaft heights, car heights etc. No fancy maths is being done on the fly for this.