Build the Rotation Rig

First we'll build the structure for for the rotating wheels which will push Adabot and the reindeer up and down.

  • On both sides of the box, use a pencil and a ruler to mark a point 4.3 cm from the back of the box and 3.3 cm from the bottom of the box.
     
  • Use a hobby knife to poke holes at the points.

  • Take a skewer and push through holes.

Making the Wheels

  • Tie some twine around a push pin. Then tie the other side of the twine around a pencil tip with the length between the twine and the pencil tip being 3 cm. 
     
  • Stick the push pin into thick width cardboard.*
     
  • Use the pin and twine to guide the pencil around a circle.
     
  • Repeat 3 more times.
     
  • Make sure circles are close to 3 cm.
     
  • Cut out circles with hobby knife.
     

*You may need to add a layer of cardboard underneath for the push pin to be stable.

Prepping the box to mount the motor

  • Take out the skewer and use a hobby knife to enlarge the hole on the left side of the box until the motor extension fits inside.*
     
  • Holding the motor parallel to the bottom of the box, use a pencil to trace the outside of the motor.
     
  • Repeat on the outside of the box.
     
  • Unfold the left side of the box pulling out the middle piece of cardboard.
     
  • Cut out the motor tracing from the inner and outer walls of the box.
     
  • Fold the middle piece back in place.
     

*Orient the motor such that the black and red (GND and 5V) wires are coming out away from the box wall. Also the zip tie holding the wires has a piece that may be sticking up so make sure that is not touching the wall.

Mounting the motor

  • Place the motor inside it's mounting spot and firmly press onto wall to create an imprint with the small circular plastic piece.
     
  • Create a hole with a hobby knife where the imprint is. (This is to make the motor mounted more parallel and sturdy)
     
  • Put the motor in place and screw in an M3 screw until the screw end comes out the other side of the box.
     
  • Twist on a M3 nut.
     
  • Repeat with the other screw and nut.

Placing the circles and skewer

  • Draw a point in between the center and the edge of each cardboard circle.
     
  • Poke a skewer through all the drawn points.
     
  • Stick skewer through the pre-made hole on the right side of the box. Once the skewer is through the right side hole, place the circles onto the skewer.
     
  • Attach the TT-motor hub to the motor.
     
  • Drop some hot glue inside of the motor hub and stick skewer end inside holding until dry.
     
  • Orient each circle to be 90 degrees of rotation from each other. One way to do this: starting with the right most circle, orient such that the skewer is going through at 12 o'clock. Then the next one over at 3 o'clock etc.
     
  • Make sure each circle has an equidistant space from the next and hot glue circles in place.
     
  • Cut the excess skewer on the right side of the box if desired.
This guide was first published on Dec 03, 2018. It was last updated on Dec 03, 2018. This page (Build the Rotation Rig) was last updated on Dec 03, 2018.