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Module Curve Tool 15 August 2002
Module Curve Tool
15 August 2002
I have some plans for a curve jig a friend helped me design. Here is an early concept drawing of the tool (Module Tool 1) and a current design (Module Tool 2). The second drawing is of one half of the tool. The two pieces will be stacked and glued. This is not complete plans, as I build the tools I will post images.

The idea behind the jig, is that it will hold the two end plates while I build the sides in between the two end plates. This way I can build multiple curves that are interchangeable. I can also adjust the jig to 22.5 degrees and build two curves that would be interchangeable with one of the 45 degree curves. Time will tell if it works.


Click on an image to see a larger version

I finished the Curve Jig. Here are two picture of the jig with a 45 degree module in it. Notice on the small end of the jig there is a "wedge" of plywood. This is cut to the angle I want the jig at and screwed to the jig. There are pencil marks on the jig as to where to line up the end plates for this corner piece.

All I need to do to make a 22.5 degree corner piece is cut a new plywood wedge. In theory two of the 22.5 degree curves would replace one 45 degree curve module.


Jig Details

Module-Jig-3.JPG (78175 bytes) This is a view of the end of one leg. Note I stacked two pieces of 3/4 plywood for the base. The vertical is also 3/4 plywood. The idea is to create an "L" beam. It is very stiff and rigid. IT will not bend.
Module-Jig-4.JPG (111385 bytes) This is a a view f the hinge end. Notice how the two legs are different. The two pieces of plywood used to make the two legs are the same. They are put together the same, then one is flipped over and they meet as show.
Module-Jig-5.JPG (71920 bytes) This is how I found the correct place to put the pivot. The first time I did it wrong. The pivot should be placed in line with the "outside" of the module ends. This is the "top" intersection of the two rulers. This is the inside of the vertical pieces of the legs, not the inside of the bottom piece.

This is important so you can measure from the pivot out for placement of the module end.

Module-Jig-6.JPG (100124 bytes) Here is a view of the entire jig from the leg end. Note that because of the placement of the pivot, the jig will not close all the way. If you are making very very small angle modules, you can trim more out of the top end of the opening to get the jig to close tighter.
Module-Jig-7.JPG (107177 bytes) Here is a view of the pivot end. I use a piece of 1 1/4 inch dowel for my pivot. IT is glued into the bottom leg. I use a fender washer and a screw to hold the jig together.

Notice that I had to move my pivot, I placed it in the wrong location the first time. If you look at the left leg you can see a pencil line coming off the leg down the center of the pivot.


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