Thread: RORO shed
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Old 03-04-2014, 08:31 AM
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The_bluester (Paul)
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Join Date: Feb 2011
Location: Kilmore, Australia
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Have been thinking about the design of a polar wedge for my CPC 925. Trying to functionally copy the Celestron wedge is over designing it. Better to take some inspiration from the NEQ/other type generic GEM.

What I need is a small length of alloy turning stock, probably no more than 100mm (the base) into one end of which a groove can be turned about 10mm from the end, that allows for clamps to hold it down on a pier and if in a suitable round hole in a baseplate, also for the azimuth adjustment. The top of the alloy round stock would need suitable flats milled on opposing sides and two holes drilled side to side between the flats. One for a pivot bolt, one for an adjustment locking bolt.

Mounted via the holes would be a thick alloy plate on which the scope is bolted using the original Celestron points in the same way as on a celestron wedge. Underneath the plate, plate "ears" would need to be fitted to mount to the base.

Polar alignment would be fiddly, but it would only have to be done once. I will try to come up with a sketch in the next couple of days so people who have done similar can critique.
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