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Old 17-09-2007, 11:38 PM
Rod
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Rod is offline
 
Join Date: Sep 2006
Location: Mount Martha
Posts: 387
Hi Steve,

The first photo shows the two joined trusses. On the side you can't see, I drilled a small hole through the bolt and placed a pin in it to hold everything together. The aluminium block is tapped to accept the bolt. The first few millimetres are drilled with a wider hole to accommodate the pin. It's a very crude attempt to do what is shown here:

http://www.wcc.net/~myastronomy/ATM/B3/Upper%20Cage_truss%20tubes.htm

As I have built it at this stage, collimation does not hold between setups so the idea needs some work. It is however very rigid.

Hope this gives you some ideas.

Rod.
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