Pulleys never seem to work as well as you think they will. Cable or rope de-rails from the pulley as lines jerk, bag down.
Cables or rope break, knot up at the worst possible time. The main concern should be though, if the pulley just falls apart or comes loose, where will everything end up? Swinging down and smacking someone?
Have some devoces figured out to stop this from happening , like an extra steel ring the cable or rope is fed through and secure enough to hold back the counter-weight if it breaks at the wort possible moment for the worker or customer, Where will they be standing?
should they be allowed close access? Prob, not.
I over-sized a cable controller I made it run inside of a piece of 3 inch pvc.
Too much cable slack, it may loop, someone's foot or other body part gets pinched when the weight is tightening everything up.
I have a device that really needs to work well and not fall apart, I eventually went to stainless steel cable ,maybe 3/8 inch thick. no more twisting or kinking .
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