Cable and Pulley Routing help needed for Fitness Machine

Hello,

I am trying to put together a fitness machine that used up to fifteen pulleys. Is there anybody here that is an expert in this feild or knows someone who is? I am willing to pay a reasonable consulting fee if they can help solve my problem.

Thank you,

Edmond

 

Well I am ok with the concepts but not good at the exact cause and effect of cable and pulley mechanical advantage. I have a problem where one area of this fitness device needs half the travel of another area. Ideally the area with the desired half travel would have a mechanical advantage so that its for example 1/2 pound would be equal in resistance to 1 pound at the end of the front cable where the weight plates are.

So "B" needs to go half the distance as "A"

1/2 a pound at X needs to equal 1 pound at Y

The pulleys you see can be arranged in any way or more pulleys/cables added. Please help!

Thanks!