How to dovetails the easy way
Ply is an excellent material for making bee keeping equipment, how I use it is by dovetailing the corners and sealing everything with Cascamite or the same urea based waterproof glue known today as Resintite by EverBuild.
If you search around you can secure good prices for the higher quality birch ply which is what I use then seal well with a non toxic preservative.
For equipment used occasionally like solar extractors I use the cheapest shuttering ply which is quite adequate.
Dovetails and glue no nails needed, I will take a few pictures tomorrow and show those interested of doing dovetails the really easy way.
Further to what I said yesterday here is a step by step of how you can do dovetails.
First you need to work out the angle of the pins and tails, to do this you require a sliding bevel not shown but you can buy one relatively cheap from your hardware store, or make your own, see pictures.
To find out the correct angle you need to take a piece of paper or scrap of wood with a straight edge.
Mark in one corner X and from here measure and mark off in both directions from the corner 5 inches and 1 inch then draw a line from 5-1, this is the angle you set your gauge to or make your own from scraps from the projects etc.
You can also buy ready set dovetail jigs for this job, but I thought I would show you how to do it the old way l so at least you know or can make your own gauge like I was shown.
To make a dove tail set square all you need is two pieces of 6.0 or 9.0 mm ply, I x 4 by 2 inches and another 3-5/16 by 1-1/2.
The larger of the two needs to be cut, to do this using your 5-1 pattern from before mark off the side plate and cut the edges to the angles and glue and pin the top plate/both pieces together using either a sqaure block of timber or another set square.
Also make sure that the top plate lines up perfectly with narrow end of the jig at either side because this half of the jig becomes your set square for the opposite lines down to your cutting gauge line.
The angle of the 5-1 ration works out at 11.5 degrees for those with an adjustable cut off saw.
The 5-1 ratio is used for softwoods and a ratio of 7-1 is for finer work on hardwoods.
Now you can work out how to and make your own jig for nothing.