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 2018-12-03 19:34:27 -0500. This page (Build the Rotation Rig) was last updated on Dec 03, 2018.