Questions about making split blocksPosted By Jim Moscheck |
While waiting for my mirror cell for my 14.5" f4.3 mirror to be finished I'm moving ahead and want to fabricate the split blocks for my mirrorbox. The truss scopes I've seen that have split blocks fasten them to the mirrorbox like the book recommends, with four drywall screws countersunk into the split block. My mirrorbox is going to be made from 1/2" thick plywood and I don't think the screws will have enough wood to grab them tight enough. Has anyone attached them with the screws driven from the inside of the mirrorbox into the split blocks? Or should I just drill through the holes and use machine screws with a nut and washer inside the mirrorbox?
A friend of mine has an angle jig so instead of shimming the blocks so the truss tubes meet the UTA I'd like to drill the holes at a slight angle. If anyone has make a similar sized scope what size angle did you use? The book says 1.5 to 2 degrees.
Any advice would be appreciated.
A friend of mine has an angle jig so instead of shimming the blocks so the truss tubes meet the UTA I'd like to drill the holes at a slight angle. If anyone has make a similar sized scope what size angle did you use? The book says 1.5 to 2 degrees.
Any advice would be appreciated.