Introduction: The Move-inator: Prosthetic! by Aditi Joshi

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About: Hi! I am a passionate student exploring the different aspects of the world through science! Fun fact: I am an animal lover!
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Hello everyone! Today I will be sharing how to make a prosthetic! I was inspired by Dr Doofenshmirtz when I was naming my creation, "Behold the Move-inator!"I am pretty new to 3D designing, so suggestions are welcome :)

Supplies:

  • Velcro Clay (Optional)
  • Wooden Dowel (That should fit through the 2nd gear and the connectors, i.e. an axel)
  • Hot Glue Stick with Hot Glue Gun
  • 3D Printer
  • 3D Printer Filament (Any colour of choice)
  • A subject's limb (I made mine with polymer clay)

Step 1: Measuring

First, we will measure the limb of your subject. Since I did not have a subject, I made a limb of a transtibial amputation with clay. The structure of the limb will greatly affect the next step, which is planning a prototype.

Step 2: Planning

We will now design our prototype. Sketch an idea that will best fit the needs of the subject. The measurements will help you to carry out this task, so keep them handy. Many ideas can come and go but choose the one most relevant. Personally, it took me a couple of days to capture the fragments of my imagination and jot them down on paper. I came up with 2 valid prototypes. Out of these two, I chose the second one.

Step 3: Designing

Now we will take upon the task of designing the prototypes on Tinkercad. Tinkercad will allow us to virtually view and create the 3D model, making it easier for us to visualize the prosthetic. I have separated the prototype into 2 parts; the upper body and the lower body of the prosthetic.

Step 4: Printing

Please scale up my design by 2.66 when printing as I found that the original size provided weak results.

I have also attached a photo of the design getting printed.

Attachments

Step 5: Assembly of Upper Body I)

Let us first work on the upper body, which consists of velcro strips, knee shield and 1st gear (the gear which does not have the foot shape.)

We will attach the hook and loop to the knee shield to secure the subject's limb with hot-glue.

Step 6: Assembly of Upper Body II)

Then we will attach the velcro and shield combo to the first gear as it is shown in the images with hot-glue. That's it! We are done with the upper body!

*Also, you might have noticed that the 1st gear and the shield aren't already printed as one. I later improvised and changed the 3D printing design to join the gear and shield so that it is not necessary for you to do it manually with hot-glue like I did :)

Step 7: Assembly for Lower Body I)

Then we will assemble the lower body. It consists of the 2nd gear (foot gear), 2 connectors, hot-glue and the axel wooden dowel.

First, put a little bit of hot-glue on the tip of the axel and insert it onto the connectors.

Pass the other end of the axel through the foot gear and join it with the other connector. Make sure the axel moves inside the foot gear.

All done with the lower body!

Step 8: Assembly-Joining Both Bodies

Now we are going to join the lower and upper body together, using the flat ends of the lower body's connectors. Use hot-glue to stick them both together at the little nubs on the upper body's gear. That's it!

I also put lines of hot glue at the bottom of the foot gear to give more grip, but it's completely optional :)

Step 9: Done!

Thanks for viewing my Instructable! Hope you enjoyed it! Feel free to improvise on the designs! Suggestions are welcome!

Made by Aditi Joshi