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Roof is moving fine and is now usable, I've made a small mistake that i could do with some ideas on how to solve.  The height of the walls is 2 meters and you will see in the video back right side I've added a counter balance weight to ensure the roof moves smoothly back.  Of coarse this means that the roof can only move 2 meters forward before the weight hits the pulley. I need to add some form of pulley system that will allow a 2 meter vertical movement  to translate to a 2.5 meter horizontal movement.  Next on the to do list is insulate the walls and clad them with some decent composite boards.

 

 

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Attach the counterweight to a pulley and loop the wire around it back up towards the roof. A 2 metre drop will then allow for a 4 metre roof movement. Obviously you've now got a 2:1 ratio so to get the same closing force you will need to double the counterweight. 

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11 hours ago, Clive said:

Attach the counterweight to a pulley and loop the wire around it back up towards the roof. A 2 metre drop will then allow for a 4 metre roof movement. Obviously you've now got a 2:1 ratio so to get the same closing force you will need to double the counterweight. 

Hi Clive 

 

thx, a quick picture would be useful 👍

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