Archive for category Mechanics

Ferocious Zip Ties

WARNING: Never hold a zip tie by its tail (the long, flat end) and use it like a whip to hit someone with the head (the square end that you can feed the tail through).

This happened to me on Sunday where, upon arriving, I was attacked by a bored freshman sophomore. It kind of stung, but I didn’t think anything of it… until I started trying to work on planning pre-season lessons. That’s when I noticed my hand was bleeding in several places (5, to be precise). I had to go upstairs to have Eric’s mom put some antiseptic on my hand (I don’t trust sophomore boys to keep their hands clean. Heck, I don’t trust me to keep my hands clean).

Needless to say, I was kind of pissed.

On the plus side, I managed to work with Daniel to get most of the training schedule for next year set. We have 12 days this year, up from 9 last year (just how school scheduling works out) (hooray!).

Training this year is going to be a LOT more hands on than last year. Half the sessions are reserved for hands on practice, including wiring and programming a robotic arm and building a set of drive trains. Hopefully everyone will come out of training ready to head straight into Build Season (or at the very least, know the difference between a bolt and a nut).

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Week Five: 1/31/09 – 2/6/09

We took advantage of the first full week of school in nearly a month to get a lot done on the robot. The three-wheeled backerman drive was completed and prepared for transfer onto the robot itself. The dumper and harvester were altered to better manipulate moon rocks within the robot and the catapult was completed and tested in conjunction with the camera. Thanks to this, we now have a much better idea of the catapult’s range and ability. The final parts for the gyro were acquired and construction began on it. Our programmers continued to work diligently on the LabVIEW code and made changes to the website. Meanwhile, the public relations subteam worked on the team’s entries for various awards and provided the programmers with additional content for the website.

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Week Four: 1/22/09-1/30/09

Once again, team meetings were delayed due to days off, this time the result of two snow days. With the school closed, students could not get back into the building to retrieve robot parts, but progress continued to be made by team members CADing parts of our virtual robot. For the remaining days, hours increased and we managed to continue to stay on schedule for completion.

This week, the programming subteam tested and modified the acceleration code and wrote the three-wheeled robot code for cRIO. Other team members redesigned the alternate shooter and continued to perfect the four-wheeled prototype’s frame and the harvester system, which can now load and dump orbitz balls. The backerman prototype was also tested and proved itself useful. The scouting subteam worked on designing the team’s t-shirts for this year and writing up information for several FIRST awards.

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Week Three: 1/17/09-1/21/09

Monday and Tuesday were holidays, but the team met anyway at the home of our Vice President. Attendance was significantly reduced because of this, but also because Wednesday, Thursday and Friday were exam days and many students opted to stay at home studying instead of attending meetings. We still managed to make progress, especially on exam days as the tests let out earlier than the normal school day and meetings often lasted longer.

Construction on the frame of the completed four-wheel drive continued, and the harvester and its accompanying roller and belt-clamping mechanisms were worked on. The ackerman drive prototype was switched for a more efficient three-wheel design that has been dubbed the ‘backerman’ design. Other mechanisms such as the harvester’s feed system and the catapult progressed, both of which are nearing completion. Meanwhile, the programming subteam was able to write code to better control acceleration make the camera track and follow colors. They also updated our team’s website.

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Week Two: 1/11/09-1/16/09

Subteams busied themselves with working on their projects and ordered crucial parts necessary to complete the robot. The prototype for six-wheel drive was switched for four-wheel drive, tested, and proved its worth. The ackerman design evolved into a three-wheel design incorporating a motorized castor wheel. The harvester, roller and catapult continue to progress, and while the shooter was considered a viable option for some time, it was eventually abandoned. Also, a full-size model of the trailer for the game was completed and our designs for power-bumpers were tested.

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Week One: 1/4/09-1/9/09

Following kickoff, we spent Saturday and Sunday brainstorming concepts for robot construction.  By the end of Sunday, we settled on designs to flesh out and prototype. On Monday, members gathered together and those who had been unable to attend the kickoff were informed of this year’s game rules and our team’s strategy. Throughout the rest of the week, the mechanics sub-team worked on completing the two prototype frames and several types of ball manipulator, including a harvester, a spring-loaded launcher, and a catapult. One of the prototype frames was completed enough to test, and it worked fine. The other one was still under construction.

Meanwhile, the electronics sub-team created several versions of the electronics board to test out with the prototypes and helped the mechanics sub-team with their various devices. In the programming room, the PR sub-team assigned various responsibilities and planned out their activities for the coming season. The programming sub-team itself were able to successfully track colors using the camera and began developing code for the prototypes’ drive systems. So far, attendance and moral have been high as we eagerly look forward to another excellent season.

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