My team is using rope and pulleys to lift a continuous elevator. We have noticed that the ropes pulling the elevator down are tight in the elevator’s lowest position and become loose as the elevator goes up. I have videos linked at the bottom and am going to describe how we tension it. Please help with advice or thought.
So far this is what we have been doing, we :
- have the springs on both ropes that are bringing the elevator up and ropes bringing the elevator down; we start to tension by fixing the elevator at its highest point with pieces of wood in between stages
- tie the ropes going down to the springs and tension them with a taughtline hitch
- then we roll the winch as we bring down the elevator so that the rope stays tight (at that point elevator is in the bottom position with ropes pulling elevator down coiled on the winch)
- then run the rope pulling the elevator up through our pulleys and tie them to the springs
- tension them with the same taughtline hitch.
You can see the middle two ropes become loose near the winch on the bottom:
Here you can see the two ropes in the middle loose tension as the elevator goes down:
also, do you know better ways of tensioning then using a taughtline hitch?