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.