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I've recently been working on, no assembly required 3d printed wind-up cars and have been using Shapeways strong and flexible plastic (SLS printer) to print them (i don't have a 3d printer).

In this Instructable I will go through how to design your own 3d printed wind-up gadget as well as giving you some files (including STLs) to help you get started - including a very simple pull back car that you might be able to print in one piece on an extruder-type printer using supports (serious points to you if you manage to get it working!).

Step 1: Designing the Spring

I designed the spring using Adobe Illustrator's Spiral tool I then saved it as an SVG and imported it to turn it into a 3D object.

When using the Spiral tool click and hold the ctrl and or alt key and drag (on a PC) to change the number of turns and the shape of the spiral.

The material you use and thickness of the spring will determine how big and how many spirals/how spaced out they are. For Shapeways nylon (WSF) plastic a spring of about 1mm thick was best. I experimented with different numbers of turns in the spring and found a more spaced out spring was better as it allowed you to wind up the spring further (and therefore unwinds longer).

Included below is the STL (Spring.stl) file for a spring, and the SVG files for a solid line (SpringLine.svg) spring and a spring outline (SpringOutline.svg).

<p>I know about &quot;be nice&quot; policy, but... please show me the &quot;no assembly required&quot; part of this instructable? Maybe I missed this part, but I can se that we need to print very single part and then assembly them. When I saw the &quot;no assembly required&quot; i thought of the car that comes assembled right when it comes out the printer ;) It's a great design but the title is misleading.</p>
Each step is just the components I included in my design, the whole thing is printed out already assembled. The title explains exactly what it is
My car does come out of the printer in working order in one piece.......
<p>this is genius! </p>
Thank you!
<p>Great design, though it looks like it could use a bit of rubber on the wheels. Perhaps you could just wrap them with a rubber band?</p><p>Fantastic work!</p>
Thank you! - using rubber bands is one of my suggestions at the end
<p>I love that sort of thing since I was a kid with one main street regular was a Jewel merchant &amp; Clock repair He had a small wind-up gear cutting machine with special files &amp; etc. I once left a raspberry about 3-D and He wrote back describing some up-sides. the One that gets Me is re-using any fails crushing the failure and use the same material to have another go.? That's Gold Dust, that is! I have an old metal and plastic V/W Camper Buss / &quot;Smoakey - Pipe&quot; You drag it backward on a smooth surface and point it where You want it to go and let it do so. ~(:-})={&gt;---- ]</p>
Excellent printing! How do you design the gears?? Is there a specific software so the different gear sizes can interlock appropriately?
There are a few different ways and softwares to design gears with. I designed these gears from a drawing, it was a rather long, messy and ad hoc method which is why I didn't include it (though it worked in the end). Check out this instructable for better methods https://www.instructables.com/id/3D-models-of-gears-for-3D-printing
<p>Thanks for your help!</p>
<p>Very helpful! I would love to make something wind-up.</p>
<p>It's great fun to play with! </p>
really amazing concept, design, and implementation. what software do you use for your design?
I just used 123d design, nothing too complicated
<p>amazing concept. &lt;a title=&quot; love quotes</p><p>&quot; href=&quot; http://kquotes.com&quot;&gt; <br>love quotes &lt;/a&gt;</p>

About This Instructable

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Bio: I like to make everything and anything! from electronics to food! and i'll be showing you all the things i come up with here!
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