I used 3 sheets of 1/8 inch plywood (4 X 8) I went to a specialty lumber yard for this and got Mahogany for $11 per sheet. the wood joints were from 1/4 inch square dowel. I ended up using around 50 4 foot pieces. I also used several 1/4 X 1.5 X 48 pine slats. I experimented with 3 types of wood glue from Gorilla and LePage. All worked equally well.
The cat is optional!
I toyed with the idea of making a master mold for each of the individual parts then casting them from polyurethane foam but that proved to be rather expensive for the mold making supplies and raw materials. The wood construction is more time consuming but careful work yielded a great working and looking cube in the end.
You will also need some way of clamping the wood while it is being glued. I chose some scrap metal and exercise weights.
The finished cube is broken down into 27 individual "blocks" .
It is easier to describe the build in the terms of blocks but in actuality I made all of the parts in steps. Some of the pictures may appear out of turn but it should all make sense in the end.
the clamping was accomplished with painters tape and binder clips. Along with massive free weight.
Mark out a square that is 27 inches on all sides. Find and mark the center. Using a precision instrument, Make a circle of 9 inch radius.
The side pieces were prepared first using a jig to cut the 9 inch radius section.
All of the radius cuts were finished first. The 9 inch radius is from the center of a 27 inch cube. Coincidentally i found that a circle of radius of one block is ideal for this project. This means that it is scalable. I could feasibly make a cube that is 1 kilometer cubed with this formula but I would not want to move it. Furthermore I could also make a cube that is it 1 micron cubed...
Cut and shape the arc...
A small piece of pine slat is cut at 45 degrees on the corners to fit the arc.
The pine slat is glued then clamped for drying. Once dry it is formed on a belt sander to conform to the arc of the cutout.
Small sections of 1/4 inch square dowel are cut the glued and clamped into place creating an end cap formation.
The side panels that are 5.75 inches wide are prepared and then glued into place.
all wooden panels are glued into place as shown in the pictures.
The result is a wooden "cube with an open section along the arc.
Painters tape and binder clips along with weight are used to clamp the pieces together.
The corner blocks are made from 2 arc pieces 9 X 9, 1 piece 9 X 8.75, 1 piece 8.75 X 8.75, 2 pieces 8.75 X 5.75.
This piece is crucial to the operation of the cube. This piece is glued to the 6 middle single coloured pieces and creates a movable hub for cube operation.
The center block is a 6 sided stick figure made from 2X2 cedar and metal angle brackets....
The center block is constructed from one 8 7/8 inch piece and 4 pieces 2 15/16 inches. These are glued and held together with metal angle brackets.
Find the center of each end of the pieces and drill a 1/4 inch hole about 2 inches deep. This can be done before or after the pieces are glued together. I found that a drill press gave the best and straightest results.
Roughly measure the center distance of to center caps place at the edge of a 27 inch square. Find the center measurement from inside flat to inside flat of the blocks then subtract 9 inches from that.
My construction needed an 18 inch center block to make the tops of the center caps to be 27 inches.
From this I cut 6 pieces of teh cedar at 4.5 inches each.
I used a drill press to drill a 1/4 inch hole all the way through. This was followed with a 3/8 hole then a 7/8 hole was drilled to be 3.5 inches deep.
I selected 6 5/16 inch 6 inch long lag bolts and 6 3 inch 5/6 diameter compression springs from a local big box store. I also needed 18 5/6 inch narrow washers.
These spring assemblies were assembled as shown then used to attach the short cedar pivot sections to the center block assembly
Place one end block on a smooth flat surface and position the center piece onto it, then cap it with another end block. It should be no more than 27 inches but ideally be 26.75 inches.