Partridge in a Pear Tree Automata

Build an automata with a back and forth motion using two cams.


You'll need

  • Cardboard
  • Satay sticks
  • Straws
  • Tape
  • Coloured paper
  • Glue

Step 1

Instructions

Cut the cardboard pieces to make the frame of the automata. Download measurements.pdf as a guide. Or, if you have your own laser cutter, download the .svg files.

Or, if you have your own laser cutter, download the .svg files and laser away!




Materials

  • Cardboard
  • Cutter

Downloads: automata_frame.svg automata_measurements.pdf automata_shaft.svg

Step 2

Instructions

Assemble automata frame
(a) Pinch the top of the side pieces so that it becomes more manageable to bend
(b) Slot the flap into the top frame
(c) Do the same for the other side of the frame
(d) Slot in the bottom piece of the automata




Materials

  • Cardboard pieces

Step 3

Instructions

Assemble cam
(a) Cut a 4cm piece of the satay stick.
(b) Insert the 4cm-satay stick into the top hole of the cam.
(c) Insert the other end of the satay stick to the bottom hole of the second cam.




Materials

  • Scissors
  • Satay Stick

Step 4

Instructions

Assemble cam shaft of the automata
(a) Poke the satay stick through one of the side piece
(b) Insert the cams that we did in step 3.
(c) Poke the satay through the other end of the side piece
(d) Adjust cams to be centralised to automata




Materials

  • Satay stick

Step 5

Instructions

Assemble cam follower
(a) Squeeze a small piece of straw through the top hole. This provides a smooth surface for the satay stick to glide along.
(b) Thread the satay stick through the top
(c) Attach a circular piece of cardboard on the bottom of the satay stick. This is the cam follower.




Materials

  • Straw

Step 6

Instructions

Test and Improve

(a) Glue the satay sticks to the cams and cam follower.
(b) Test your automata; if it works well, wrap the ends of the cam shaft with scotch tape to prevent it from sliding out.




Materials

  • Glue
  • Scotch Tape

Step 7

Instructions

Decorate your automata with a partridge and a pear tree!




Materials

  • Partridge and tree cutouts

Code and References

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