Tuesday, November 7, 2017

November Mission Model Discussion: M06 - WATER TREATMENT part 1, Making Sure it Works

Welcome to the November Mission Model Discussion! From now until just before Thanksgiving this space will feature ONE part of the FIRST LEGO League HYDRO DYNAMICS game challenge per day. The Robot Game is only 1/4th of the overall FIRST LEGO League challenge for teams this year! This post is meant to be an aid, not a replacement for carefully reading the Challenge Guide!

For this post, we are just going to focus on the correct setup of this model. Tomorrow we will address the scoring and other items.  Thank you, Oregon Head Referee, Tom Mosher, for writing this post!

  • For testing, separate the Water Treatment Plant model from the west axle, and then test that the water tank drops freely when the red axle is rotated by hand to release the locking mechanism.  If the mechanism does not move smoothly (from Robot Game Update 2)...
  • a) Loosen the gear train on the North side of the model by slightly springing-open the beam assembly in the NW corner.
  • b) Loosen the conveyor belt drive gear by sliding it slightly northward on its axle (visible from the east side of the model).


  • If the conveyor belt slips, you can re-sync it by fully lowering the Water Tower, sliding the drive gear North until it disengages, then move the conveyor to the correct position, then lightly push the gear South into position.


WTP-Belt-Gear.jpg


  • Do not over-raise the water tower, use the tan gear in the NW corner gently.
  • Align the Toilet with the marks on the mat - the east axle will not be aligned with its marks, but that’s OK (see Robot Game Update 2).
  • The Water Treatment Plant should be slightly loose within the guides that hold it in place on the mat. This allows the mechanism to move freely.
  • A correctly adjusted Water Treatment Plant will run the conveyor belt only while the Toilet lever is held down. This means the Robot should press and hold the Toilet Lever until the water tower has completely lowered. Expect the models at your tournaments to work smoothly and without binding. Referees may be lenient in case of a model malfunction, but your game strategy should not rely on it.

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