|Forum topic by Vrtigo1||posted 07-06-2011 11:57 PM||1051 views||0 times favorited||3 replies|
07-06-2011 11:57 PM
First, a picture because without it I’m sure what I write will be hard to understand…
This is a basic diagram of a wine rack that I’m making. It’s made out of 3/4 plywood and this is looking at it from the front. I’m going to put a face frame and edge banding on eventually to cover the endgrain, but for now it’s as you see it here.
Here’s another picture of the actual project as it sits now. This is just the right side of what you see in the diagram above (nevermind that the solid piece of plywood in the diagram is opposite what’s in the picture, I drew the left side and then flipped it to create that diagram).
I want to put a piece of plywood between the top left corner and bottom right corner, then I want cut shallow dadoes on either side of that and intersect it with two smaller pieces of plywood from the top right and bottom left corners to create an “X” shape. The wine bottles will sit in the top, bottom, left and right cavities.
Since the space where this is going is wider than it is tall, the two “squares” (the left and right side of the cabinet) are rectangles instead of squares. In my head, I thought this through as though they were squares and everything would be nice 45 and 90 degree angles.
I used an online calculator and got the angles at the top left and bottom right corners, they’re 51 and 39. As you can see in the picture of the project, I used a scrap piece of ply and cut the two ends at the appropriate angles and fitted it in there. That much fits pretty well – not perfect, but the face frame will cover up any errors there. As far as the dadoes that will need to go in the middle of that piece, I cut one end of another scrap piece to the appropriate angle, fitted it in the corner and marked where it crosses the first scrap piece. You can see the pencil marks in the middle of the scrap piece in the picture.
My question is what is the best way to go about finding the correct angle for the dado cuts? I have an angle finder somewhere, but I’m not sure how accurate that’ll be. Is there some math that I can use here that will get me to 100% theoretical accuracy (I know nothing’s 100% since plywood isn’t 100% flat)? Or is this just a case of trial and error until it fits?