Commit b487b0d0 authored by Charles De Mey's avatar Charles De Mey
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Mold Star 20T description

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<b>Toolpaths</b>: The path/ directions a tool follows as it cuts through material to achieve a desired geometry of a shape.
Since the ShopBot can only read files in the *.spb* format, we had to export all of the designs from [Aspire](https://www.vectric.com/products/aspire) in that format.
![](../images/week05/GroupAspireTest.png)
![](../images/week05/CutShapes.jpg)
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## Raspberry Pi
The first type of architecture we wanted to try was Raspberry Pi
The first type of architecture we wanted to try was Raspberry Pi.
### PI Setup
......@@ -27,7 +27,7 @@ After a good bit of troubleshooting with very simple codes, we finally found 2 s
Our second possible issue was the LED itself. To test out this theory, we made a very simple circuit consisting only of a power source, ground, the LED, and a 330 ᘯ resistor. If the LED was working correctly, it should turn on immediately after completing this circuit. Since it did not, however, turn on, we identified that the problem was the LED. When we tried the same circuit with a different LED, it turned on. When we used this new LED in the blink circuit that was connecte to the Raspberry Pi, it worked flawlessly.
<iframe width="560" height="315" src="https://www.youtube.com/embed/sh8Dp8q2XmM" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
[INSERT WORKING RASPBERRY PI VIDEO]
## Raspberry PI Pico
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# 9. Molding & Casting
## General
This week's group assignment was to review the safety data sheets of several different types of molding and casting materials, and then testing them out and comparing the results.
## Data Sheet Reading
<iframe src="https://drive.google.com/file/d/1IHOmytiUM8FNJdP9NZBQzmAlZ0Rx9HHU/preview" width="700" height="600"></iframe>
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### Milling
Once we had the vectors created we started to work on the toolpaths. the first step was to set up the material. We were using 3/4th inch wood and the length and width were made a little bigger than what we needed. Once we verified that everything could fit, We used the 2d outline tool and selected the edge of each vector. The bit was already setup on the machine so we selected the 1/2th inch flat end tool and Aspire generated the toolpaths. We then exported the toolspaths from Aspire using the SBP format after simulating.
Once we had the vectors created we started to work on the toolpaths. the first step was to set up the material. We were using 3/4th inch wood and the length and width were made a little bigger than what we needed. Once we verified that everything could fit, We used the 2d outline tool and selected the edge of each vector. The bit was already setup on the machine so we selected the 1/2th inch flat end tool and Aspire generated the toolpaths. We then exported the toolpaths from Aspire using the *.SBP* format after simulating. As mentioned in our [week 5 page](http://fabacademy.org/2021/labs/charlotte/Group%20Assignments/week05/) (characterizing the CNC machine), this is the format of files that the ShopBot can read.
![](../images/week10/milledpart.jpg)
### 20T
The first type of casting material we tried was [Mold Star 20T by Smooth-On](https://www.smooth-on.com/products/mold-star-20t/). As you can see in the picture below, there is a "Part A" and a "Part B". To cast this material, you need a ratio of 1:1 (by volume) between the two parts. Applicable to all types of casting materials, we have to mix these two parts thoroughly. It is also very important to remember to always stir horizontally, meaning not moving the dowel (or any other mixer) up and down to prevent air bubbles.
<center>
![](../images/week10/20t.jpg)
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