The Rear Logic Display Surround hosts the Rear Logic Display on the back of R2. This one was made similar to the way I made the Front Logic Display Surrounds. The difference is that this piece is rounded and needs to be cut and measured very carefully so everything comes out correctly. The materials used is a piece of poplar hobby wood and some double sided tape. I used a plunge router to cut the curve and a miter saw to cut the bevel and miter. To do all the measurements, I used my ruler and rafter square.
Plunge Router
Miter Saw w/ Angle Capablities
Double Sided Tape
Template for cutting logic displays
Ruler with 1/32 marks
Rafter square for marking wood
Rear Logic Display Surround Plans
The first step I took was cutting the circular portion of the surround. I made a plastic circle cutting guide for my plunge router to cut the 9.125″ radius circle. I then made a hole in a piece of poplar down the center of the board 9.5″ from the top and secured the board to a table and cut the circle.
Template for cutting logic displays
Plunge Router
Cutting the round section of the Rear Logic Display Surround
Final Cut of the Rear Logic Display Surround
I then marked my board, from the top center of the circle going down, the total height of the piece. Another line was marked perpendicular to that line so I can cut that piece off the board. Once cut off the board, this piece will be used to make two halves of the surround.
Cutting round portion off of board.
Round Cut piece
The next post in this series will go over cutting this round section into two halves with proper dimensions.
Once all parts are cut, we need to glue them together. I used the panel from the outer dome as a guide to test the fit of the wood pieces. After verifying the fit, I took some wood glue and put it on each side of the wood pieces and assembled them in the panel. After one hour, they were dry and awaiting a bit more cutting.
Elmer’s Wood Glue
Gluing each piece of the surrounds.
Using the panel as a guide and frame.
After the glue is dry, we take the piece out of the panel carefully so we don’t bend the panel. The panel is made of Aluminum so it can bend easy. The outside area is then cut to fit the inside of the panel per the plan.
Logic Display Surrounds inside Surround panel
This is a quick video of the whole process for cutting and constructing the wooden logic display surrounds.
Lets review the plan for this first. All measurements are in standard form and need to be converted into inches if you don’t have the proper measuring tools that measure in decimal form. There are two types of pieces to cut, a long side and a short side.
Small Logic Display plans
Our second step in this process is to take our piece of wood and use the router to put a groove into our plank just bigger than 3/16″ deep. The actual plan calls for this to be a bit bigger so it will stick out enough from the two domes on final assembly.
$8 Poplar hobby wood 4′ x 4″ x 1/2″
Making groove just bigger than 3/16 with a router
Groove cut by Router
Once the groove is cut, we measure 7/64″ from the right edge of our router cut, and 1/8″. We use our small ruler to do this with the 1/32″ marks, and since we are measuring in 64ths, we know this mark will be in between 3/32″ and 1/8″ (4/32″). Get the Rafter Square to do put straight lines down the right side of the board at these markings.
Ruler with 1/32 marks
Rafter square for marking wood
It’s time to cut these pieces to the dimensions we just marked, using our Miter Saw. We start with the mark that is 1/8″ from our router edge. This will be the flat 1/16″ portion of the inside of our surrounds according to the plan. The blade of our saw is about 1/8″ thick, so be sure your blade is to the right of this line, or your cut will be 1/8″ smaller than planned. Once this is cut, we angle our saw to 16° and cut this piece, again lining our blade to the right of the mark.
Miter Saw w/ Angle Capablities
Groove cut by Router
Flat cut side of logic surround of 1/16″
16° angle cut for surround leaving edge
With our 16° angle cut, we will align our blade with the left side of the router cut on our wood. We can either get the exact measurement for this side, which is 1/16″ to the left side of the right sided portion of the router cut, or just cut our piece from the left side of the router cut flat and use a dremel or possibly a jigsaw to cut our piece down to the proper sizes so it can fit into the dome.
Trimmed on routed side per plan
We can now cut our 45° angles on both sides using the Miter Saw. We start with the right side edge of our piece close to the edge of our backplate on the saw and make our cut. We then measure 1-19/32″ from the long side of our raised portion of the piece, and cut this at 45°. This will give us our outside measurements of the surround that fits into R2s Small Logic Display port.
One side of the 45° angle cut
Both sides cut at 45°
This gives us one complete side of our surround. 3 more pieces like this, and 4 more pieces for the 12° angle side that is 1-1/8″ long, and we can begin to glue the pieces together.
