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[[File:Rsschematic1.png]] | [[File:Rsschematic1.png]] | ||
'''Protoyping Experiments''' | '''Protoyping Experiments''' | ||
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[https://www.youtube.com/watch?v=tGhcTwIJ4Es Link to a nice (if you mute it) youtube tutorial about how to fold this type of origami] | [https://www.youtube.com/watch?v=tGhcTwIJ4Es Link to a nice (if you mute it) youtube tutorial about how to fold this type of origami] | ||
Here is an experiment with 'Muscle Wire' which shrinks when certain currents are applied. I tried sewing it into the paper to see what kinds of movement could happen. It resulted in subtle, slow movements which were too slight for this project | '''Using Muscle Wire''' | ||
Here is an experiment with 'Muscle Wire' which shrinks when certain currents are applied. I tried sewing it into the paper to see what kinds of movement could happen. It resulted in subtle, slow movements which were too slight for this project. Muscle wire also turned out to be quite complicated to use. It is easy to burn it out by applying too much current or an appropriate amount of current for too long resulting in it becoming unresponsive. I think it could be an interesting material to work with in the future but needs a lot more research/experimentation. For this reason I went back to working with servo motors. | |||
[http://makezine.com/2012/01/31/skill-builder-working-with-shape-memory-alloy/ Link to a Make article about using muscle wire, I found this useful] | [http://makezine.com/2012/01/31/skill-builder-working-with-shape-memory-alloy/ Link to a Make article about using muscle wire, I found this useful] | ||
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Schematic for muscle wire | Schematic for muscle wire | ||
[[File:Rsschematic2.png]] | Here the transistor is needed to provide the muscle wire with enough current whilst not drawing too much current from the Arduino and therefore preventing it from breaking. | ||
[[File:Rsschematic2.png|385px]] | |||
[[File:schematic2rs.png|300px]] | |||
'''Expanding Circles Experiments''' | |||
Here is another experiment with mechanisms for opening and closing the origami balls. This time I made expanding circles by fitting together sections of squares - The idea being to place a motor in the middle, twisting the structures. In the end this turned out to be much more complicated than the umbrella idea so I discontinued but I really liked the variety of shapes which were made just from squares. | |||
[[File:expandingcirlces.png|600px]] | |||
[https://vimeo.com/177207484 Video of this here] | |||
''' | ''' | ||
Fitting together umbrellas, servos and origami''' | Fitting together umbrellas, servos and origami''' | ||
I needed to find a way of translating circular motion (of the servo) into push-pull motion to control the umbrella structure. I made little wooden attachments for the servo propeller which I thought could push directly against the bottom of the internal umbrella structure, moving it up and down regularly in different patterns. It turned out that this approach put too much force onto the servo and caused it to stop turning. Then I attached a wooden stick between the propeller and the bottom 'pushing' part of the umbrella. This worked well but didn't allow enough range of pushing, due to the size of the propeller. I solved this by putting on of my wooden propeller adaptions on, and then connecting the umbrella with this. I found that with a large oval shape a far bigger range could be achieved. | |||
[[File:Umbrella8.png]] | [[File:Umbrella8.png]] | ||
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[[File:Umbrella7.png]] | [[File:Umbrella7.png]] | ||
[[File:sensorhl1.png]] | |||
[[File:sensorhl2.png]] | |||
[[File:shrs8.png]] | |||
[https://vimeo.com/177210267 Video of servo moving umbrella mechanism] | |||
Here I managed to get the servo and umbrella mechanism working with the spaghetti sensor but when I attached the umbrella spokes to the origami, the tension became too much for the motor. To get round this problem I thought of trying to make less tension in the paper by using thinner paper and smaller folds. I have started to fold the structure underneath (which is taking an incredibly long time) and will test this soon. | |||
[[File:sensorhl3.png]] | |||
[[File:sensorhl4.png]] | |||
[[File:sensorhl5.jpg]] | |||
[[File:sensorhl6.jpg]] | |||
[[File:sensorhl7.jpg]] | |||
The full realisation of this project will be documented [https://www.uni-weimar.de/medien/wiki/GMU:Human_and_Nonhuman_Performances_II_SS16/Rachel_Smith here] when complete. |
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