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# Sheet Prototyping

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<img src='img/ur-rotation-end-effector.png' height=400px>
<img src='img/wiz-and-rotary.jpg' height=400px>
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Cutting and folding sheets may be the fastest way to put precision features on multiple planes.  A sheet fabricated prototype can go from design to part in minutes and scale to massive production volumes.

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<img src='img/cardboard-1.jpg' height=200px>
<img src='img/cardboard-2.jpg' height=200px>
<img src='img/cardboard-3.jpg' height=200px>


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### Materials

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* Cardboard
* Paper
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* <a href='http://www.itwformex.com/'>Polypropylene</a>
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* <a href='https://www.mcmaster.com/#standard-plastic-sheets/=1a6mf16'>Dibond</a>
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* Steel
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* Stainless Steel
* Aluminum: Must be a formable series, like 1100 or <a href='https://www.onlinemetals.com/merchant.cfm?id=753&step=2&top_cat=60'>3003</a>

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### Cutting Tools

* <a href='http://cba.mit.edu/tools/display/?type=tool&id=universal_laser_x2600_laser_cutter#'>Laser cutters</a>
* <a href='http://cba.mit.edu/tools/display/?type=tool&id=omax_2652_waterjet_cutter#'>Waterjet</a>
* <a href='http://cba.mit.edu/tools/display/?type=tool&id=zund_g3_l-2500_digital_cutter#'>ZUND</a>


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### Creasing Methods

* Press Brake
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* <a href='http://cba.mit.edu/tools/display/?type=tool&id=finger_brake#'>Finger Brake</a>
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* Vice Bending
* Perforating
* Half-cutting
* Bevel routing
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### Design Factors

* Thickness
* K-Factor
* Relief

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### Design tools

* Fusion 360 sheet metal: 
	* <a href='https://www.youtube.com/watch?v=nEjFMYNGY4g'>tutorial (nyc cnc)</a>
	* <a href='https://www.youtube.com/watch?v=1aDN44__L9E'>tutorial (cardboard)</a>
	* <a href='https://www.youtube.com/watch?v=UXNSlxXjzhk'>sheet metal gems part 1</a>
	* <a href='https://www.youtube.com/watch?v=_CPkUqedqhA'>sheet metal gems part 2</a>
* Rhinoceros 'UnrollSrf' Command
* Solidworks sheet metal
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* 123D Make
* ExactFlat