Since I don’t want to clutter the forums I figured I’d post these two threads under the same title. First off, I spent all of thursday, and friday recording can grabbers on newton, and all of saturday recording grabbers on other fields during elims. I recorded at 120 fps with a samsung galaxy S6, then went back and counted frames for each grabber to try to get accurate speeds. Because of the fact that 120fps recording gives me a time resolution of 8.3ms I rounded times to the closest 10 or 5 ms increments so times aren’t perfectly accurate. The other thing to note is that I didn’t have a way to know exact enable times for matches that we (1678) didn’t play in so I don’t know exactly how long grabbers took to startup. Our triggers took about 2 frames (~15ms) to fire when tested off the field so that was the only robot I had an accurate initialization time for. All times for recorded grabbers are posted below.
Since I have your attention I’d also like to give some special shoutouts to the teams I got interact with on the field and in the stands. First shoutouts go to 118, 1671, and 5012 for being the best alliance I’ve ever had the opportunity to work with. Getting to pair up with the 3 top ranked teams at sacramento and 5012, a team recommended by 987/148 themselves, was unbelievable.
118 is the most organized, and on-the-ball team I’ve ever met, their scouts knew every team inside and out which made our friday night meeting a breeze. Their drive team in particular was a class act and strategical insights we didn’t even consider before teaming with them at sacramento. And finally of course, their mentors who I had the pleasure of joining for dinner. I’ve never learned so much before about building a successful and lasting program like theirs.
1671 is a team we’ve long looked up to for their success with chairman’s award and was certainly part of the inspiration that pushed us to kick up our outreach program. I’m sure we’ll meet many times in the future and I’m eager to see you guys again soon. #StACkRAMENTO (credit to mike for that one)
5012 is a team that reminds me of our own back in 2011. Before then we were a team that struggled to make eliminations in regionals, but making it to worlds that year motivated us like no other. Despite not being in any matches you were the biggest secret weapon we had. The time you guys put into cheesecaking your bot with a can grabber, and a second tethered set made sure we were prepared for whatever got thrown our way, if we met 1114 in the finals you guys certainly would have been the best shot we had. You guys are clearly on your way up to ranks and I’m sure your accolades of recommendations from 987 and 148 say more than I could about you.
Several other teams I met in particular: 987 were great sports every time I ran into them and loved to talk field-side between matches when I was there. 148 a great bunch as always and I’m glad to see a lot of friendly faces after spending so much time with them in 2013. 254, 973, ad 971, the norcal homies. These teams were great, offering to help us out in pits (and cleaning up after, the part no one wants to do) when they dropped out due to some very bad luck and unfortunate mishaps. 1114 for being great sports and hanging out with me on the sidelines while I watched their matches on Curie, and Karthik in particular for taking his own valuable time to chat with me and to give a fantastic presentation that somehow manages to get better every year. Finally a big thanks to our favorite rookies (and 2nd years) 5458, 5027, and 5529 who helped us realize that FIRST isn’t just about our own team.
Finally, some can burglar numbers for those who I teased in the beginning. These times are all hook-to-the-can. I’m not putting time-to-unstealable because it’s hard to tell how far the can needs to tip for the other team to not be able to grab it. All times were recorded from the first movement of any robot on the field (doesn’t account for enable delays between driver stations). Keep in mind there may always be some recording errors, I tried to do the best I could.
In no particular order:
1114 harpoons - 105 milliseconds (word of mouth)
1114 2 can - 350 ms
971/254/973 cheesecake - 175 ms
148/1923 cheesecake - 175 ms
1678 (4 wraps, on the field) - 175 ms
1678 (5 wraps, pits) - 158 ms
987 - 290 ms
3310 - 205 ms
5027 - 266 ms
2056 - 250 ms
3940 - 300 ms
1918 - 225 ms
1711 - 370 ms
330 - 400 ms
2046 - 350 ms
3339 - 470 ms
368 - 370 ms
1983 - 480 ms
166 - 400 ms
I accidentally deleted some videos but I think I recall a couple of times for some teams I recorded, give me a heads up if I made any mistakes:
67 - 205 ms
118 - 205 ms
548 - 205 ms
16 - 350 ms?