Folks -
I have a 4 equally sided pyramidal lid, apx 14" square, that rises at an angle of 25 degrees - how the hell cut accurately and glue it up?
Based on the compound miter calculator (
Now the top isn't flat - it has "cupped" almost 1/2" across the middle and sallies like a rocking horse when you put it on a flat surface... NOT what I was after.
So, here are my obs and questions: The scales on the saw, especially the bevel cut (Bosch 4412) don't allow for that sort of precision. I am thinking that I am not hitting the same exact angles when I change the orientation of the saw blade for the different cuts, and this is allowing errors to creep in when I think that the two mated panels, or panel sets are at their correct angles. There really aren't any user adjustable stops that would give me that dead on accuracy I'm after. Because of the triangular shape of the panels, I can't flip the wood around for every orientation I would need in lieu of changing the saw angles.
For glue up, I am thinking that after I have the panel sets glued up, I might be able to clamp the panel pairs down onto the tablesaw so that everything will stay flat.
I would also like to reinforce the joinery for these shallow thin panels, but think that a biscuit would blow out. I am chicken of using dowels because of the absolute discrete alignment concerns.
Look forward some feedback on this one....
John Moorhead