Notes on making the Centre Finder

Step One

Step Two

Cut a right angle square out of any rigid hardwood or hardboard ranging in thickness from 1/4" to 3/4". If the material is too thin, it won't form a stable lip (or ledge) for the wood to butt against. Take care to ensure that the inside angle is 90°.

Cut a straight piece from the same material that you used for your right angle square. This piece should be roughly the same length, width and thickness as one of the arms of your right angle square (but does not need to be exact). Cut off both ends at a 45° angle.

Step Three

Note

Glue the straight piece over top of the right angle making sure that it bisects the 90° right angle exactly (creating a 45° edge).

Flipping the piece over you will notice that the 45° edge piece sits over top of the right angle, creating a lip (or ledge) for the wood to butt against.

Alternative

Alternative

If you prefer you can use a triangle shape instead of the straight piece to form the 45° angle

Here's how the underside of the alternative design looks.

Notes on using the Centre Finder

Step One

Step Two

Align you wood blank under the Centre Finder and butt the wood up against the sides of the right angle square. Scribe a line on the wood using the straight edge as a guide.

Rotate the piece an repeat step one. For uneven pieces, you may want to rotate the wood several times and scribe multiple line. The natural centre will be found where the lines intersect.