Two linked miniature rings from one piece of wood
- 8-sided 2D CNC mill
- Custom built fixtures
- Lots of manual sanding and polishing
- Several layers of varnish
As a wedding gift to my wife I wanted to make something special and unique. I thought that two linked miniature wooden rings carved from the same piece of wood was a suitable gift. The only problem was how to make them… Since I wanted perfect symmetry, creating them by hand was not an option. I was thinking about making fixtures to get an even size and shape. I even considered cheating, creating two rings and cut one open and glue them together invisibly. But I figured it was more special if they were made linked together from the same piece of wood. I decided to cut the basic shape with my CNC mill. The problem was that I did not have any proper CAM processing software at the time (for 3dD control of the tool) and the cutters I had was only rough PCB routers… By only using 2dD control, I realized that I had to cut the rings from 8 different sides to get the basic shape. To do this I needed a proper fixture.
This is how it was done:
1. Creating fixtures to clamp the work piece
2. Cutting mounting slots for the fixture in order to get a fixed position
3. Cutting out a block of oak to fit in the fixture (actually I cut out two blocks so I had one in spare)
4. Cutting the wooden block from 8 sides
The fixture holding the wooden block to be milled from eight sides.
Side view of the fixture, showing ring orientation.
5. Manual filing, sanding and polishing
6. Several layers of varnish
Outer diameter of the rings [mm]: 11.6
Thickness of the rings [mm]: 1.6
Width of the rings [mm]: 2.6
1.0 First rings
2.0 Second rings (after the first set was lost)
Future No updates planned (I really don’t want to do it again :)
The CNC files below for controlling the mill is for reference only. It is very unlikely that your mill is configured exactly like mine. Position of zero, cutting speeds, position of tools etc is most likely different. Running unknown code on expensive and powerful machines is not recommended. I do not take any responsibility if the machine damage itself or worse,, someone else….
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.