# Week 11
## Machine Building Week
As a group we decided to build a Ouija board that has a gantry system that moves the cursor using a magnet behind the board. To accomodate the machinery, the board would be integrated into a table.
I was the design and fabrication lead for the table and box.
> Actuate and Automate your machine
> Document the group project and your individual contribution
### Design of the Table
I began by quickly modeling the table in 3D in Rhino 8 to estimate how much wood we would need, and see how all the parts would interface.
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| *The very first version of the design with candles in green, board in blue. Originally the table was on coasters and had a spooky lamp but these were both removed given time.* |
Here is first layout of all the parts to estimate how much wood was required (I overestimated in case of any mistakes.)
**Cherry, 58 Board Feet, min width: 7 inches, rough-cut thickness: 2 inches**
Alternatively in planks of different sizes:
- 12in x 10ft x 2in count: 2
- 7in x 8ft x 2in count: 2
- 7in x 12ft x 2in count: 1
[Ilan](https://web.mit.edu/imoyer/www/portfolio-phd/) kindly offered to pick up this wood for us at [Anderson McQuaid](https://www.andersonmcquaid.com/), but this amount of wood would have cost hundreds of dollars and was out of our budget.
We decided to go with some wood Chris had in the yard outside of the woodshop, which was free, but required a lot of milling & processing.
I also consulted with Chris who advised to reduce the thickness of the legs of the tables and sketched out how to make mortise and tenon joints for the legs.
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| *Chris' sketch for the table legs* |
I continued to iterate on the design, with help from [Alexandros](https://fab.cba.mit.edu/classes/863.25/people/AlexandrosGravalos/), [Avi](https://fab.cba.mit.edu/classes/863.25/people/AvigailGilad/) and [Adin](https://fab.cba.mit.edu/classes/863.25/people/AdinRimland/).
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| *Iterations of the Ouija Board table with candles, components, etc.* |
I then sent this design to [Shengtao](https://fab.cba.mit.edu/classes/863.25/people/ShengtaoShen/) and [Justin](https://fab.cba.mit.edu/classes/863.25/people/JustinWan/) so that they can add custom engraving and carving patterns on the surfaces. The specification for the engravings is that they must stay in the hatched zone on the model and not be more than 1/2" deep.
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| *Version 3 of the design with the areas for engravings hatched* |
### Processing the legs of the table
The wooden legs for this project were cut and planed from log Chris had drying outside. [Avi](https://fab.cba.mit.edu/classes/863.25/people/AvigailGilad/) and [Alexandros](https://fab.cba.mit.edu/classes/863.25/people/AlexandrosGravalos/) helped with this.
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| *Impersonating the slice of log for scale* | *Other side of the slice of log with sawmarks* |
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| *Marking a 2 inch thick chunk of log using an adjustable square* | *Finding where a leg would fit in the rough slices of the log* |
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| *Cutting excess off in the short direction with a chop saw* | *Cutting the second long dimension on the bandsaw* |
### Processing the sides and top of the table
The sides were made out of these roughly cut planks which were also warped. We had to find where each of our pieces could be cut from the planks without hitting and cracks. This was an iterative process that required processing things partially, seeing how the parts might fit, etc.
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| *The roughly sawn wood from a log* | *Laying out some of the planks to see where the parts would fit* |
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| *Bandsawing the bark and softwood from the plank* | *Reinspecting how the pieces fit on the partially processed planks* |
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| *Using the joiner to plane the first face* | *Using the joiner to plane a short side once the face is flat* |
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| *Once you have a flat face and a square side, use the thickness planer to plane the other face* | *The plank will now have two planed flat faces that are parallel with each other* |
### Engraving with sides of the table
### Assembly
For the full project please see [Ouija Board](https://fab.cba.mit.edu/classes/863.25/Architecture/Machine-Week.html)
> prepare a demonstration of your machines for the next class
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| *Image description* |
## Acknowledgments