Partridge in a Pear Tree Automata

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


YOU WILL NEED

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

STEP 1

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

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

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

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

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

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

Decorate your automata with a partridge and a pear tree!




Materials

  • Partridge and tree cutouts

Made this activity? Good Job! Now spread the word. Share a photo of your creation on social media with #letsgethacking #PartridgeinaPearTreeAutomata