Week three was centered around prototyping, much like week two. To begin, we had two main indexing prototypes. One was shaped like a C, dubbed the reverse scorpion. Balls travel along a belt before being brought to a shooter. In the photo, our single flywheel shooter is pictured. The second indexing design was a rotating magazine of game pieces. Students were inspired by videos from other teams, one of which this prototype was directly inspired by. A rotating base brings balls to a spinning wheel in order to get the balls to eject into the shooter. By the end of the week, our DVC (Design Voting Council) decided on furthering the rotating indexing mechanism rather than the C indexer. The reasoning behind this was the issue with height. Since we had already decided on a shorter robot, the C indexer posed a disadvantage in regards to height, even though both designs were comparable in their vertical footprints. Students thought that the rotating indexer could be more easily shortened, while shortening the C indexer would affect the compression of the balls. The C indexer prototype was also shown to struggle with manipulating five balls, while the rotating indexer did not have the same issue. The laser cutter is still at work! Since we are in [...]
This week, we continued with prototyping by splitting into three main groups: indexing, shooter, and intake. For indexing, or ball manipulation inside the robot, we decided to CAD and prototype the c-index as well as a spiraling prototype. Furthermore, the shooter group prototyped a single-flywheel shooter, and they are making great progress on improving the precision and accuracy of it. They have started calculating the optimal angle and velocity at which to shoot the ball in regards to the outer port. The shooter group will also be prototyping a double flywheel shooter to see how it compares to the single flywheel. The intake group was also hard at work exploring different variations of a rolly grabber. Although we haven’t finished all the prototypes and finalized our design, we made some excellent progress this week and we hope to decide on a design next week. In addition, we finished assembling the chassis of our robot, the foundation for all of our mechanisms. We decided on a smaller size robot this year, being 26”by 30”, compared to last years’ 30” by 30” chassis. We believe that this smaller design will be beneficial during matches due to the fact that we can fit under the Control Panel. We decided to make a shorter, smaller robot because we [...]
We had a great start to the 2020 build season. On kickoff, some of our members headed to Pioneer High to watch the stream and get our kit of parts. Once we got the entire team at our classroom, we went over the release video and game pieces before hanging out and eating some food. After, students had some time to read the game manual before jumping right into strategy discussion. Compared to last year’s game, Deep Space, Infinite Recharge seemed more daunting, since there seemed to be more complexity in regards to the overall game concept. This year, there are three stages in a match. Each stage, teams have to meet prerequisites before being able to start the next stage. Because of this emphasis on the game pieces and the importance of the endgame (another climb), we had to consider many different options in regards to general strategy and what kinds of mechanisms we wanted to design. We spent the first two days focusing and deciding on strategy rather than design. Once we came to a decision with the votes of our DVC (Design Voting Council), we were able to move onto design brainstorming. We settled on prioritizing the designing of a climb and a shooter for the game pieces. While a majority of our team came [...]
Since we secured a finalist position at the Silicon Valley Regional, our team qualified for the World Championships in Houston, Texas, which took place from April 17th to April 20th. In the weeks leading up to the championship, we held a team-wide fundraising effort to meet the high cost of bringing 21 students and a robot across the country. We ended qualifications with a 5-5-0 record. Overall, we were very satisfied with our experience at the Houston Championship; it was a great opportunity to learn from and compete alongside the best teams in FRC. After Houston, we discussed the Championship as a class and listed some valuable lessons to apply in future years. After returning from Houston, our team held student leadership elections in order to choose our mechanical director (Brady Ankenbrandt), programming director (Holden Adamec), operations director (Daniel Stulski), and team captains (Cathy Wang and Charles Wang). After presentations from each candidate, a classwide election was held, and the votes were tallied up. Once the new captains and directors were confirmed, they met with the previous year’s captains and directors to decide on subteam leads. As the school year came to a close, we organized a list of potential summer projects to work on during the break. With the help of some alumni, we were able to get [...]
Our first competition was the San Francisco Regional. We ran into technical difficulties, particularly with the electrical board. Our planning for assembly was not up to par, so we were faced with mechanical issues as well. From there, we knew what we had to do in order to perform better at the next competition. Although our performance at SFR was not as successful as we had hoped, we agreed that this was a stepping stone we could utilize in order to learn from our mistakes. Putting this into practice, we spent a lot of time in the two weeks before our second competition testing and refining our mechanisms on our second robot. By the time of the Silicon Valley Regional, it had become clear that all of the hard work we put into preparing had paid off: our robot ran much more smoothly, and we had improved to the point that we were the number one robot for delivering cargo. After 80 qualification matches, alliance selection began and our performance earned us a spot alongside the fourth seed alliance, headed by Team 604. In the playoffs, we made it through the quarterfinals and semifinals to ultimately compete against Team 254, one of the best teams in the world. Although we ultimately lost against them, as a result of [...]
Now that Week 6 and the entire build season is over, we have finished our robot and bagged it! We had a lot of work to do this week, but everybody contributed and we managed to accomplish all of the goals we planned out in Week 5. At the beginning of the week, our programmers worked hard to finish up our drive code and vision/alignment systems. Later in the week, we held our driver tryouts in order to choose our driver and operator. We finished the assembly of our robot and were in a bit of a time crunch to tie up a few final loose ends on the very last day, but we powered through and got it done. Our first competition is San Francisco Regional, and we’re hoping for a good performance!
As Week 5 comes to an end, we only have one more week to work on our robot before it’s bagged and tagged. Although all of our mechanisms have been machined or assembled, we still need to attach them to our drivetrain and begin testing all within the next week. For now, we finalized our CAD this week, so we are ready to continue assembly and testing. We also tested our drivetrain in order to make sure it’s running properly, and hope to test our other mechanisms in Week 6 as well. We have quite a bit of work cut out for us, but with our increased efficiency and the longer work hours that inevitably accompany the end of build season, we should be able to pull it off. Be sure to tune in next week for DESTINATION: TESTING AND BAGGING.
We’re currently behind but catching up fast. Even though there’s only a little over two weeks left in build season, we still have about half the number of hours remaining. I guess that’s what happens when our schedule is heavily skewed toward more hours at the end of build season. Going into Week 5, we have a driving robot, which is a big milestone in build season. On the mechanical side, our CADers have been working on our elevator mechanism and the elevator carriage. Instead of the monorail elevator design we used last year, we are making an elevator with two rails parallel to one another–a design that proved successful in 2018. CADers also worked on gearboxes and other integrative components to finish our mechanisms and overall design. Meanwhile, our machinists have worked on brackets, hex hubs, and elevator rails (which they are still working on). Assembly and electrical members have focused on building our chassis from our machined drive rails and constructing our electrical boards. We chose to build two robots this year, and currently our first robot chassis is fully assembled with an electrical board, while our second robot is slightly behind without attached electronics. Having learned from our mistake of using a slanted electrical board last year, [...]
Summary of Week 3: Lots done, lots to go. The main focuses this week were CAD and manufacturing. Our robot CAD is nearly complete, and we have manufactured our robot’s drive rails and brackets for the chassis. Meanwhile, programmers created our state-space library and wrote the code to control our elevator and wrist mechanisms. With the confirmation of design came the beginning of fabrication, with students working diligently in the metal shop to make drive rails for the drivetrain. We were able to begin working on the drivetrain fairly quickly, as we used a parametrically CAD-ed chassis made during the offseason to save valuable work time. Although the final robot CAD is not done, we have made progress in fully designing the individual mechanisms and planning how they fit together. We are especially emphasizing discussion and design reviews in order to ultimately have a better product. [/fusion_gallery] The CAD team worked vigorously this week to transform our CAD from a mock elevator on a semi-complete drive base into a full robot design complete with a drivetrain and mechanisms. All that remains is a few refinements: brackets, size adjustments, and mounting holes. [/fusion_gallery] Our robot design–now that it is more fully [...]
This week, we have made a consensus on the overall design of our robot, consisting of a four-wheel mecanum drive train, v-block hatch intake, and mecanum rolly grabber intake for cargo. The v-blocks and a tray for cargo are planned to be mounted on an elevator to bring the game pieces to be deposited at different heights. We decided to go with a mecanum drive train rather than our usual west coast drive because it helps with precise alignment on the rocket and cargo bay. With the confirmation of design came the beginning of fabrication, with students working diligently in the metal shop to make drive rails for the drivetrain. We were able to begin working on the drivetrain fairly quickly, as we used a parametrically CAD-ed chassis made during the offseason to save valuable work time. Although the final robot CAD is not done, we have made progress in fully designing the individual mechanisms and planning how they fit together. We are especially emphasizing discussion and design reviews in order to ultimately have a better product. [/fusion_gallery] Once our programmers were familiarized with our mechanisms and new code structure, the delegation of tasks began, with small groups of 2-3 people being assigned a subsystem [...]