• 3D print the caterpillar tracks : we printed 40 pieces in total (20 for each side), 2 main wheels for the motors and 4 secondary wheels. We assembled the tracks using M4x25 screws and bolts. 

• 3D print the arms and the mechanism that go with them. You will need one of each piece. ( more detail in the PDF concerning the arms in the files)

• 3D print the head and eyes. Place the ultrasonic sensor in the space and add the eyes.

• You can find the models in STL in the file.

• 20X20X25 (inside)
  Chassis : 3.5 cm high 20cm large fold plastic and screw on the bottom

• Laser cut the body and assemble it. It should click into place thanks to the finger joints. Our wood wasn't perfectly flat so we had to use a few pieces of tape to keep everything together. We also put the SVG (laser cuttable) file to your disposal. 

• Upload the code into an Arduino board (we used a Uno). Plug in the components. To plus everything, you can follow the image of the wiring we posted.

• Assemble everything! the chassis with the secondary wheels are placed under the body (make sure the tracks are parallel to each other). 
• The main wheels are attached to the motors through the small circular holes on the sides. The arms' mechanisms go on either side, inside of the body. 
• The head goes (of course) on top. The front of the robot is the face with the big rectangular hole which is a trapdoor that allows you to access the components inside.

• Note : print/cut everything in the original size, every dimension was calculated to fit with each other and the electronics.

- we assembled the new box that is 20% smaller with the new catterpillar track from the arduino makeblock orion robot.

For that we " sew" the bottom of the box to the chassis with a thick cable to make the whole structure sturdy.

We rewired everything into the new box with the new components ( see the easyEDA wiring in the files)