how could we increase the efficiency of machine?
it is related with single purchase winch crab machine
Decreasing friction in the joints and moving parts is your best bet.
Decrease friction!
The efficiency of any machine measures the degree to which friction and other factors reduce the actual work output of the machine from its theoretical maximum. A frictionless machine would have an efficiency of 100%. A machine with an efficiency of 20% has an output only one fifth of its theoretical output. The efficiency of a machine is equal to the ratio of its output (resistance multiplied by the distance it is moved) to its input (effort multiplied by the distance through which it is exerted); it is also equal to the ratio of the AMA to the IMA. This does not mean that low-efficiency machines are of limited use. An automobile jack, for example, must overcome a great deal of friction and therefore has low efficiency, but it is extremely valuable because small effort can be applied to lift a great weight
Friction is the answer….so think about not how you can reduce friction in the existing design, but can you eliminate some joints to reduce friction?
