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Luc has an assistent dog. Every time his dog does something good he has to reward his dog. This can be done either by petting or giving a cookie. Unfortunately he can't reach his dog because he is in a wheelchair and can't move his arms much, giving a cookie is also very difficult.

Therefore we made a cookie machine that can be attached to his wheelchair. The machine has room for 13 cookies, which is enough for one day of rewards. To make it fun, we add a little piece that holds the elastic band back so the cookie can be shot.

Step 1: Materials

Materials needed

  • ABS (Acrylonitril-butadieen-styreen) plate 4 mm
  • PMMA (Polymethylmethacrylaat) plate 4 mm (also known as plexiglass)
  • aluminium tubes (diameters 6 mm & 7.5 mm)
  • wheel collars (diameters 8.1x10.0mm & 6.0x9.0mm) => standard parts
  • double sided tape
  • sandpaper (coarse)

Tools

  • Laser cutter
  • Metal saw

Note 1

If you can't find this diameters, you can use diameters a little bigger or smaller. Make sure you correct the diameters in the laserfile propperly.

Note 2

You will need the intstructable for making the elastic band. You can find it here.

Step 2: Laser PMMA Pieces

You can use the PDF file either for lasercutting or as a template for the dimensions.

If you want to make addaptions you can use the Adobe Illustrator file.

Step 3: Laser ABS Pieces

You can use the PDF file either for lasercutting or as a template for the dimensions.
If you want to make addaptions you can use the Adobe Illustrator file.

Note

The ABS material is 4 mm. We used settings for ABS 3 mm. Because of this, the gaps aren't fully cutted through. This is needed to prevent the cookies from getting stuck in the gaps.

Step 4: Saw the Tubes

Sawing the correct lenghts

  1. Measure the correct lenght.
  2. Use a metal saw to saw the desired piece of tube.
  3. Do this 2x

Making a cut in one of the tubes

  1. Use a Dremel
  2. Measure how deep the cut has to be
  3. Cut the tube

Note

If you don't have a Dremel, you can use the metal saw. Watch out, because this way you can easily deform the tube.

Step 5: Apply Sandpaper to Tube With Cut

  1. Take a little piece of double sided tape and added to the last tube. Don't peel it of yet!
  2. Take a little piece of sandpaper and stick it to the tube

Step 6: Assemble Everything

Step 7: Cookie Machine in Action

<p>Wow, I love this! I'm posting this to my service dog group. :)</p>
What a great way to help Luc and reward his dog. Very clever!
<p>Good job. If only I had a dog, I would make this!</p>

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More by eline nobels:Cookie Machine for your dog Elastic band 
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