Articles by tag: tips

Articles by tag: tips

    Makeshift Glyphs

    Makeshift Glyphs By Janavi, Abhi, and Evan

    Task:

    After the game reveal video was released we had some ideas on how to have our robot grip onto the blocks, but we couldn't test it without a makeshift glyph to hold onto. So we decided to upcycle some old cat and weather damaged field tiles by cutting them up into 6 X 6 squares and placing them in a cube formation. Attached below is an image of our handiwork and a image of the glyphs used on FTC fields

    Our glyph real glyph

    Reflections

    This did not end up work very well and in hindsight we could have used other materiel like printing out a 6 X 6 X 6 frame on the 3-D printer or by making it out of foam board so it would be more similar to the real thing. But thanks to the generous donations of the DISD STEM department we were provided with a full field set so we don't have to worry about creating our own glyphs. However, we will remember this for the future.

    Testing Materials

    Testing Materials By Austin, Evan, and and Tycho

    Task: Test Materials for V2 Gripper

    Though our current gripper is working sufficiently, there are some issues we would like to improve in our second version. The mounting system is unstable and easily comes out of alignment because the rev rail keeps bending. Another issue we've encountered is the cervo pulling the grippers so that they begin to cave inwards, releasing any blocks being held at the bottom. By far the biggest problem is our intake. Our drivers have to align the robot with the block so precisely to be able to stack it that it eats a majority of our game time. However, there are some advantages, such as light weight and adjustability, to this gripper that we would like to carry over into the second version.

      We tested out a few different materials:
    • Silicone Baking Mats - The mats were a very neutral option because they didn't have any huge advantages or disadvantages (other than not adhering well). These could have been used, however, there were other better options.
    • Shelf Liner - It was far too slippery. Also, when thinking about actually making the grippers, there was no good way to put it on the grippers. Using this materials would have been too much work with little gain.
    • Baking Pan Lining (picked) - It was made out of durable rubber but was still very malleable which is a big advantage. We need the grippers to compress and 'grip' the block without causing any damage.
    • Rubber Bands on Wheels - This material was closest to our original version and, unexpectedly, carried over one of the problems. It still requires very specific orientations to pick up blocks, which would defeat the purpose of this entire task.

    The purpose of this is as a part of our future grabber design, which will need to be relatively light, as our string is currently breaking under stress due to weight. The material must also have good direct shear and direct strength, as the grabber will have rotating arms that move in and out to grasp blocks. As well, we're replacing the tetrix parts with REV, as they're smaller and a little lighter, with the additional bonus of more mounting points.

    Oh No! Dying Glyphs

    Oh No! Dying Glyphs By Abhi

    Problem: Glyph Damge due to Robot Design

    We were tearing up our glyphs like this because our wheels had no guard for their screws:

    More specifically, we had multiple issues with damaging the glyphs. First, the exposed screws on the mechanum wheels (Fig 1) tended to cut into the glyphs as seen in the above picture. As well, you can see relatively sharp edges on the wheels where the block could also be cut, and that the blocks could be pinched by the wheels on the wheel. As well, the corners on the REV and TETRIX pieces cut into thr glyphs when they were rammed into the walls of the field (Fig 2).

    Fig 1

    Fig 2

    Townview Qualifier 2017

    Townview Qualifier 2017 By Kenna, Abhi, Ethan, Austin, Evan, Charlotte, Karina, Tycho, Janavi, and Jayesh

    We were lucky enough to host a Scrimmage as practice for our actual qualifier. Weeks of preparation and anticipation paid off when the FTC Affiliate Partner for North Texas told us it was "the best run qualifier this season," and the North Texas Judge Advisor, Freidrich Elliot, called it the "best judging panel he's ever seen."
    Unlike most posts in our blog, this post's purpose is not to give a play-by-play. You can take a look at how the day went on our instagram. We want to use our experience as an opportunity to help out other teams who may be hosting a qualifier.

    • It is very important to manage your volunteers. We had volunteer coordinators for every task, like a match queueing coordinator or inspection coordinator.
    • Our PTSA was kind enough to donate food as a fundraiser. However, a lot of it was left over and wasted because it was perishable. Our recommendation is be careful in the amount of perishable food you make.
    • Make a playlist using FIRST-approved songs ahead of time or use the one we used. Thanks to Roaheen Neil Mansuri on Spotify!
    • Take notice of which teams queue on their own, which teams need lots of reminding, and other general manners. You and your volunteers may be asked by the judges, as we were, which teams were the best to work with.
    • This may seem obvious to some, but if you cannot find a team, they are likely at the practice field.
    • If possible, build two fields (in addition to the practice field). It helps immensely with time management and is part of the reason our qualifier went so well.
    • Competing in a qualifier, much less running one, makes everyone a little high-strung. The most important tip we can give is to be understanding of everyone there. We all understand how much FTC means to many and it can cause some to be less considerate than normal. People standing in others' way or not queueing is not helpful, but it is nothing to lose temper over. Try to give people some kindness in a stressful day, whether you're participating or facilitating.
    • Closely related to the last point, be sure to thank people. Tell your volunteers and teams that you appreciate them being there!
    On the subject of appreciation, we'd like to thank a few people for helping out.
    A big thank you to Karina for volunteering even though she was sick. We had so much help from Townview parents and students that made this qualifier successful. The entire event would not have been successful without the support and sponsorship of DISD.