Day 01/02/16 08:00am - 03:00pm

Attendance:
- Students
Olivia
Tekoah
Wesley
Matthew
Owen
Samuel
Melea
John Paul

-Mentors
Coach Jeff
Coach Mike

Tasks

  • Building the Turret
  • Testing the Turret
  • Building the Pickup
  • Building the Electrical Board

Reflections

Building the Turret


Today we took apart the turret prototype so that we could replace the old plates with the new ones we had our sponsors laser cut. Once we had sanded down the new pieces we started spinning them to give them that nice shiny look. Next we bent the tabs on the sides of the new plates for the pulleys. Then we started reassembling the turret with the new plates. After that we put the pulleys on and wrapped the string around them to make the turret fully functional.-Samuel

After we finalized the design of the slides and had our sponsor cut out the new plates, that we mount the bearings and slides to, it was time to build the new assembly. We started by ''spinning'' the new plates and disassembling the prototype at the same time, that way by the time the new plates are finished we would have the parts from the prototype. After we assembled the new turret, we needed to find the mounting point for the pulleys.-Wesley

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These are the slide plates we had one of our sponsors laser cut for us.-Samuel

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In this picture we are attaching the new plate to the large tetrix gear Wesley

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Watching Samuel put some screws in the turret.~Melea

Testing the Turret


After the completion of the new turret we began testing. The turret system uses one motor to turn on and the other to extend with using the pulleys and string. When the motor turns it pulls the string tight and causes the turret to extend. When we ran it it ran really smooth and did great. It extends to 32 inches in an impressive 1.7 seconds -Samuel

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Here is the finished slide assembly in its starting location. - Wesley

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Here you can see how each slide extends out at the same time allowing us to triple our length in a very shot amount of time. - Wesley

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The turret in mid extension.-Samuel

Building the Pickup



Today we worked on finishing the prototype of the pickup assembly so we could get to work on the real thing. Instead of tygon tubing, which many teams have been using quite successfully, we tested a harder plastic tubing with a smaller diameter. The tubing actually worked satisfactorily, but it did have some minor problems. The balls tended to not load consistently in the middle, after the balls loaded in though, they went up fine. The blocks didn't load properly or dispense from the top right. So we decided to try something a little more flexible and with slightly more grip. For this, we decided our green wheel tread would be perfect if we cut it into small strips. We redid the first row just to see if it performed any better than the rigid plastic tubing, and it did! We proceeded to completely redo all the stages of our pickup. This worked consistently and picked up both types of debris with less difficulty. The next thing we needed to do was create some guides to ensure that the debris will dump into the trough on our delivery system. We used the oven to create smooth curves in the plastic.~ Tekoah

After finishing the prototype we used the new side plates from our sponsor we bent them and cut out a portion so they would fit correctly. We also bent a second piece of plastic that will fit over the front of the assembly and guide the balls into the turret. To do this we heated the plastic up in the oven and then held it over a guide as it cooled. We made a lot of progress on this assembly today and we should finish most of it next meeting ~Olivia
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Here we are attaching the plastic guide to the assembly ~Olivia

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We needed to cut the side plates so we took it apart a few times ~Olivia


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Here is the sweeper before we replaced the tubes with the new sweepers ~Olviia

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We used the oven to heat the plastic so that we could create a smooth curve.~Tekoah

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We only put plastic in the oven never metal in the microwave ~Olivia

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Olivia's plastic baking methodology had me slightly incredulous.~ Tekoah

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One of the plates that we had laser cut to my CAD. The laser creates lots of burs that must be sanded!~Tekoah

Building the Electrical Board

We were assigned to put together our electrical and control board. This basically consisted of taking a piece of lexan and drilling holes in specific spots to allow the core modules to be bolted on. The design consisted of one side having two sets of two controller high, stacked motor controllers with a servo controller in the middle on one side of the lexan, and the core power distribution, sensor, and a second servo controller on the other side. We received 3D printed parts from another team and used them to add supports to the wires. we placed the wires on and drilled holes for them to go through using a half inch bit. -John Paul & Owen

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Here we are getting ready to mount the second layer of motor controllers. Notice my bad posture, I need to fix that... -John Paul

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Here we are placing the modules on the plate. --Owen

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Here I am using some kind of super adhesive to hold on the supports. --Owen

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Here I am testing the amount of support the new parts give. --Owen


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Here is the side with the sensor, second servo controller, and core power modules. -John Paul

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Here is the opposite side with four motor controllers and a servo controller in the middle between the motor controllers. -John Paul