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Gordon Rayner
professor emeritus
Reged: 03/24/07
Posts: 506
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Re: Who can build me a fork mount?
07/07/08 11:00 PM
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To make trunnion holding blocks, one should consider the techniques used by Dobsonian builders. There is now a thread on p. 2 of the DIY section of this site, titled something like" How do you make split blocks". That problem is more complicated than for simple binocular trunnion location/ clamping, because the truss poles enter the blocks at angles other than 90 deg. Are they compound angles? Forstner bits, improvised sanding drums , split PVC or aluminum sleeves, threaded inserts for clamping and attachment to the fork or to aluminum angle brackets attached to the fork, are a few of the applicable ideas. Blocks made of ordinary fir or redwood lumber, glued double if required, should suffice with a PVC or aluminum split sleeve. Stain and varnish to make it pretty. For clamping action , particularly if sleeveless, hardwood seems a better choice.
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