View Full Version : Worst you've seen to the Defenses?
Ringo5tarr
11-10-2016, 10:39
What's the worst damage you've seen to/from a defense this year? Both Competition and Practice. Bonus points for pictures.
We at 1764 built some practice defenses, but never truly got to use them due to some bad time management, however we invited other teams to come over and use out practice defenses and goals while we kept working (while overall detrimental to the robot progress, it was rather effective at getting us chairmans at GKC) and one of the two teams managed to rip off the rock wall part of the rock wall, We got apology cookies at GKC though, so I guess it balanced out?
troy_dietz
11-10-2016, 10:55
Not exactly to a defense, but this was from a defense:
https://scontent-sjc2-1.cdninstagram.com/t51.2885-15/e35/14498932_1774227702860519_4992721850342572032_n.jp g
During the semifinals at Beach Blitz, our practice robot took a particularly hard hit from going over a defense and the neck just kind of snapped. We tried scoring the ball we had in the low goal (pneumatics and intake motor were still connected) but it kept rolling out of the goal. Eventually, the right side of the intake hit the main breaker and we died right next to the batter. Luckily, 5802 made eleventy billion shots during the match and managed to push us onto the batter at the last second.
We won by 10 points.
In the future, we'll make sure that critical joints are better supported. The turret was a constant battle of eliminating the weakest link throughout the entire season, and it just reached the point where we could no longer eliminate the weakest link.
I personally wasn't at worlds, but 133 blew 2 tires, 2 different matches during finals at Carver
Anyone from MAR have the video of you guys executing the portcullis after FIRST banned them from off season use?
Probably not the worst, but one I have a video of :
http://i.imgur.com/KtjGIUe.gif
Eric Scheuing
11-10-2016, 11:39
I seem to recall 558 causing some Sally Port carnage at one of the NE district events... I think it might have been Hartford.
I seem to recall 558 causing ... carnage ...
558? Nooooooo
TheBoulderite
11-10-2016, 12:27
We sheared our intake gearbox during our first QF match on Carson. It was so loud, you could hear it over the announcer and music on the livestream.
polytechnique
11-10-2016, 12:39
About four teams (including us) kept hitting the moat way too hard during the GA state championship. The holes where the toggle bolts go in got stretched out so badly that they had to replace the whole defense base and put the competition on hold for about a half-hour.
Why there wasn't a portcullis at the Iowa Regional practice field. (https://i.imgur.com/JVaJ5WK.jpg)
Thayer McCollum
11-10-2016, 12:53
Well... We had our drive gearboxes unprotected... (I think you can see where this is going) and during a Qual match at Denver we drove over the Ramparts hit our CIMs and sheared one of them completely out of the gearbox. It was hanging on solely by the wires that connected it to the PD board. We finished the match though and crossed at least one other defense dragging our CIM around the field.
Adithya Balaji
11-10-2016, 12:56
Return of Team 900
http://i.imgur.com/JD65Jhx.jpg
The Field Strikes Back
http://i.imgur.com/NmC6U20.jpg
See Kevin's post above for the robot in action!
Whatever
11-10-2016, 12:59
Team 6166 at the Northern Lights Regional sheered the polycarb off the drawbridge while going through it.
Billfred
11-10-2016, 13:15
The combined Palmetto Regional field jacked up the Cheval de Frise so badly that the portcullis was mandatory for several rounds (https://twitter.com/WmLeverette/status/703242439511908352).
At Chezy Champs teams sheared the heads off most of the bolts on the casters attached to the rock walls.
Jeremy Germita
11-10-2016, 13:24
Our good friends on 5869 show us how to truly defeat the portcullis (https://www.youtube.com/watch?v=jSeLG1_cHvs).
Does the field wall count as a defense? Chesapeake District Greater DC Qualifier... Robot Exit Stage Left. Broke through the field wall. Not our robot though and I can't remember which teams it was.
Before the Portcullis started eating Field Supervisors later in the season FRC 772 did this (https://scontent-ord1-1.xx.fbcdn.net/v/t1.0-9/12524144_10154048490764444_5491894301391719539_n.j pg?oh=dfe2f36e2ca2edd5f6f0b1998669c5bf&oe=58A12AB6) to the Portcullis by repeatedly ramming it instead of lifting it. They got a yellow card for their efforts.
Kellen Hill
11-10-2016, 14:23
Has yet to cause or receive any damage, but I'm curious how the Log Roll will fare at GRITS (Georgia Robotics Invitational & Tournament Showcase) on October 22nd.
Here is the provided description:
The Log Roll is composed of two 3.5 inch diameter logs in a 3 degree X shape that your robot must traverse. Both logs roll on independent bearings and will have a textured "bark" applied to the outside.
The Log Roll will replace the Portcullis in Category A. The other Category A defense is the Cheval de Frise.
https://lh3.googleusercontent.com/KUedvImkmF-n9ZSuijjC4Zek8nKAaxveKnvjRoZaXfL54j8WVNn5ipTziDVWI oUnnAOU1FiBUYPVuXmucd7sncnzYORT9BjfD9LLeu5LHsjgNIr ybNDIss6_3aVyxaCxWU6KgN7K_EWrWJUy13NCAKqg-G3GN1YHHHciElII3segZUHxiAsTYgEx65jN9FaE1Oi8lFdjXi8 Ilh88Pf2T1gU2j-Pk46WixT4Ja1tZckzu2sKmatcjTnKdjQrHaKJkZybCfUENoBJ4 CsdG3j1S7FJpi3db8KX4uuuyGapux4eR74TJP8nPZSTlibSoiV 3l7-OiYh44nC5VZ98qqXuquqLS1R9LEbkpihn3lfkYW7JPsIe2Yn7J 1EbLvL084HYpPH3Pz0TuDvtffm-7WEhHqS05GGuAEvxfLrQ59KO5atNwj0IUS-8rzyH2ddD6iWVsGMlC06HC_gWxiF5XtZNvc6mlmIUpmMp2UQCL 8P1ZHtV22Pmw2dC4h7Hx5gYbM6ObN4TllS0NiF2QQSdq2dck5w UXwuIq7PN6tARO3i8N78EX1VmxAmIHl0FqpNmnMg3jimlgUMOz fFpZA6iEoQjvSLH0Tr-r_z2O6YK-P7_qaXBE0oMq=w928-h692-no
https://lh3.googleusercontent.com/GyHkp8XFLFrAo0kC3kAbwxsS73REY6F_0DDa8EJNgEqrLk9KA0 RLvBCnq53xFTluMwl9kSJWXK-DYP330Cu6V8DVRopAh89GG12TNjwu0cuDVKrPi4F95Yeqi-zI8qN5OJIex2ywPr7zZMfTsXuIUn8BiRE_kHVR12uX6F2hyvNI Hwilzuzz6AYeLQrrWuZdt41kiDdvPbP81BBbtcA_Q-mWUQB42wIBLvKQcc_1E3UbnNluZxs8mUXMEJOoTFJx3et2zjjm fWQldVlKw9ePeM1gYluNHef5Nj2hZQ3N6_mS2XSe64LSSB9xhv dYaMDnyp35B1hYB2lL1HIGRShDRQwy02VZyd3iBfmljSbwAqPR s2ILJRkndWZQI28wzk9_2R2yH8Y_TmAEnFS4E0OGvqfsc0kKFD V8ahAFQjSCHwIxU_-N6kj2YgPh69A5sVqBCgxvk7L9xN0Vuiatsl21532ZtpJKBFr58 hRjqvgIsXzLBgINoocfqfAInLlIQ2vM33nMHeb-u9hih7CbRF0JCp7vLyCGq5UfdVFhNvXrABnqcsdyqteqIkgr1X ep6_Lt0gOznM4ILij3aQ10nQVrreA6ZhEiOCbi0YGfY9AvfeX6 XVFP=w917-h682-no
... but I'm curious how the Log Roll will fare at GRITS (Georgia Robotics Invitational & Tournament Showcase) on October 22nd.
I'm anticipating plenty of sadness and frustration over this.
cbale2000
11-10-2016, 15:15
Why there wasn't a portcullis at the Iowa Regional practice field. (https://i.imgur.com/JVaJ5WK.jpg)
This pretty much describes every single wood-version Portcullis ever made. I don't think I've seen a single one that survived the whole build season intact (with the possible exception of ones that were never used with actual robots).
Trevor1523
11-10-2016, 15:58
386 broke the Drawbridge in half at South Florida. I will include a picture later if I remember.
Our good friends on 5869 show us how to truly defeat the portcullis (https://www.youtube.com/watch?v=jSeLG1_cHvs).
This is my new favorite video.
I added a feature to a low bar once. After some robots knocked the pipe out of a practice low bar, I tried to repair it by stapling the fabric back together over he pipe. I needed something solid behind the fabric so the staple gun would work properly. I came across two scrap wood blocks, one of which I set the pipe on so it didn't pull the fabric down, and the other I held behind the staple gun. The staples went farther than expected, and bound the wood block to the low bar. I ended up using zip ties.
Probably not the worst, but one I have a video of :
http://i.imgur.com/KtjGIUe.gif
5607 almost crossed the Cheval de Frise, then decided that following a destructive robot wasn't the best idea. Red robot(435?) in the secret passage was about to go back to the courtyard, then decided, "I think we'll stay out of their way..." :D
Our good friends on 5869 show us how to truly defeat the portcullis (https://www.youtube.com/watch?v=jSeLG1_cHvs).
What was that portcullis made of? Did a wooden robot break a wooden defense?
Has yet to cause or receive any damage, but I'm curious how the Log Roll will fare at GRITS (Georgia Robotics Invitational & Tournament Showcase) on October 22nd.
Looks both entertaining and slightly terrifying. Will there be a webcast?
This pretty much describes every single wood-version Portcullis ever made. I don't think I've seen a single one that survived the whole build season intact (with the possible exception of ones that were never used with actual robots).
+1
What was that portcullis made of? Did a wooden robot break a wooden defense?
Yep, wooden.
At the Fall Classic, we had to repair the low bars (wooden) three times. The third time, right after the second time, we had to pull them off of the field to repair, so we ran the Rock Wall instead for a few matches.
Bkeeneykid
11-10-2016, 19:15
At GKC, we had knocked off the plastic cover on the side of the sally port at some point. That was the extent of the damage I saw. I know we have video of that somewhere...
At GKC we had a funny instance to add to our list of things we gave out with our No Robot Left Behind (NRLB) program. The field crew came into the pit looking for tools and we gave them a hacksaw, which they used on the ramparts IIRC.
I found a description: "In Kansas City, the balls held up reasonably well, but the parts on some defenses took lots of abuse. A pin holding down the Ramparts got damaged, and it took a hacksaw to get the Ramparts removed from the floor. The Sally Fort doors were also in frequent need of repair between matches. Other defenses were accumulating burrs. We wonder how the field will hold up to several more weeks of competition." (https://www.reddit.com/r/FRC/comments/4ag4us/for_those_who_have_already_competed_1_question/d112z82)
Kingland093
11-10-2016, 22:43
We share a practice field with 3130 and their low bar was a bit narrower than the competition one (that or ours was wider). I stopped counting how many times we broke it (way more than 5). Some of their freshman got a good learning experience at least....
first3234
11-10-2016, 23:35
Remember that curie division match where the portacalus came out good time good times
Link (http://m.imgur.com/a/2NSA1)
We had a fun match at SMR.
fargus111111111
12-10-2016, 09:56
We had a tracked robot and as a result we didn't need very much ground clearance (only slightly more than an inch), we had a polycarb bellypan, which was fine the whole season, our wooden version of the rough terrain though is a different story. I (the driver) tore some of the blocks off the rough terrain.
In competition at Rocket City one robot attempting the drawbridge managed to start peeling the sticker off the bridge part as they pushed it down. No real damage as it just got stuck back on, but certainly interesting.
Andrew Schreiber
12-10-2016, 09:59
Probably not the worst, but one I have a video of :
http://i.imgur.com/KtjGIUe.gif
So, for purposes of shooting and being defended... did they complete a crossing?
So, for purposes of shooting and being defended... did they complete a crossing?
My guess it would be a field fault.
ATannahill
12-10-2016, 10:13
So, for purposes of shooting and being defended... did they complete a crossing?
A DEFENSE is CROSSED by a ROBOT when that ROBOT
■ starts free of contact with the DEFENSE and completely in the NEUTRAL ZONE
■ traverses the DEFENSE such that its BUMPERS go fully between the adjacent SHIELDS/GUARDRAIL,
and
■ ends up fully contained by the opponent’s COURTYARD
I think it counts as crossed. The robot ends fully contained by the opponent's courtyard. Nothing says it has to end completely free of contact with the DEFENSE.
first3234
12-10-2016, 12:12
I think it counts as crossed. The robot ends fully contained by the opponent's courtyard. Nothing says it has to end completely free of contact with the DEFENSE.
It does count as a crossing but thanks to the rock wall coming out of the outer works it is a field fault
I seem to recall 558 causing some Sally Port carnage at one of the NE district events... I think it might have been Hartford.
Our base driver had a love/hate relationship with the Sally Port this year. It was damaged in a number of matches and the field crew gave the team some pieces as a trophy (notably a gas shock and a piece of the frame itself).
Sperkowsky
12-10-2016, 12:29
The defenses at the Suffield Shakedown were all wood and were beat HARD. I saw ramparts become a ramp. Drawbridges and portcullises becoming open doorways and overall some pretty badly beaten field elements.
ATannahill
12-10-2016, 13:20
It does count as a crossing but thanks to the rock wall coming out of the outer works it is a field fault
I didn't say it wasn't a field fault, I just answered Andrew's question.
Eric Scheuing
12-10-2016, 14:47
a piece of the frame itself
Yup, that's the one I was remembering!
SpoonMechanic
12-10-2016, 20:21
I believe it was at the Chesapeake District Championship (home of the dramatic e-stop malfunction) where someone attempted to cross the ramparts at high speed and sent them flying across the field.
Andrew Schreiber
13-10-2016, 07:16
My guess it would be a field fault.
It would. But Alex got the point of the question - Playing the game of "not a field fault" would this constitute a valid cross. It was an exercise in rule reading for folks.
Kartoffee
14-10-2016, 19:41
Worst I've seen was actually our team, at the Lakeview competition (Week 2). We were crossing the moat, got stuck 3 wheels in, and our clamping gearbox was bashing into the moat beam repeatedly. I was in the spy box when I saw our entire axle assembly fall apart, and I didn't know if the drivers knew. I was signaling wildly to stop, because they kept moving. Later in that match, our alliance tried helping us to the batter without letting us know, so we took a lot of damage in the impact then. The worst part is that we were queued right away. We lost that match with a grand total of zero boulders scored, but managed to get 3 RP in the next match after running across the massive high school to the machine shop. Unfortunately TBA has videos of all our matches except that one.
Edit: I misread the post. I thought it was the worst damage done by a defense to a robot, not the opposite.
Edit: I misread the post. I thought it was the worst damage done by a defense to a robot, not the opposite.
Your misreading was a misread. Damage goes both ways in this thread.
Kartoffee
14-10-2016, 20:19
Your misreading was a misread. Damage goes both ways in this thread.
Lol thanks Eric.
I may of broken a cheval in every district event I went to. It wasn't on purpose, they were just . . . there. Sorry First.
AmiableVariable
16-10-2016, 18:04
We had a fun match at SMR.
That is impressive
I'd say some of the longest lasting damage I encountered was from our teams practice drawbridge this year. It was not built out of wood, so the worst we could do to it was pop the string out of the pulleys. It, however, would bind up something terrible. To cope with it, we had to gear the arms very high, and precisely time the lift. We shredded so many gears on that thing. We get to the practice field at the first competition and just have to bump it up lightly with our arm....
That overgearing plagued us most of the season, and we spent finals of our first event playing defense because the gearing failed again ::ouch:: Entirely due to faults in the design, we definitely should have used sprockets and chain or belts and pulleys, because at that torque any sharp shock or stall could break the system (usually this happened with the cheval). Hindsight is 20/20
My brother (our secondary driver) started wearing one of the shredded gears as a necklace.:rolleyes:
BenDSterling
17-10-2016, 00:59
I wouldn't count this as damage but I have the share it. If you can't tell that's the drawbridge.
http://i.imgur.com/LP0RWjn.jpg
BenDSterling
17-10-2016, 01:04
Has yet to cause or receive any damage, but I'm curious how the Log Roll will fare at GRITS (Georgia Robotics Invitational & Tournament Showcase) on October 22nd.
Here is the provided description:
The Log Roll is composed of two 3.5 inch diameter logs in a 3 degree X shape that your robot must traverse. Both logs roll on independent bearings and will have a textured "bark" applied to the outside.
I can't wait to see the Log Roll! It should be fun.
ILAMtitan
17-10-2016, 10:56
Our driver on 3005 got a trophy from TRR this summer when he broke off the polycarb divider on the batter ramps. That seems pretty common though.
The worst I personally witnessed was as game announcer at Alamo, and this all happened about 5 feet from me. 4091 accidentally used the wrong auto code in a match, making them go full speed over the moat and crash into the driver's station. They weren't done though, and about 2 seconds later the robot did a 180, and went full speed back to the center of the field. It hit the defense divider by the secret passage right in the middle of their intake. The entire defense holder got ripped off the field. This was only one of many delays for the very long event.
. It hit the defense divider by the secret passage right in the middle of their intake. The entire defense holder got ripped off the field
............ What gear ratio and motor combination were you using to manage that?! o_0
PatEhrgott
17-10-2016, 11:20
The worst I've seen done to the field was at week one Hatboro-Horsham. I think the photo will speak for itself.
https://twitter.com/FRC708/status/706292723519758336
ILAMtitan
17-10-2016, 12:00
............ What gear ratio and motor combination were you using to manage that?! o_0
I was just the GA, not my robot.
petercooperjr
18-10-2016, 09:59
As a ref at the Rhode Island event, I saw a robot in Auto go full-speed backwards (not sure if it was programmed wrong or just placed on the field the wrong way around), right into a Cheval de Fail, bending one of the "planks".
https://twitter.com/laj517/status/713440848839630848
For the entire year, I alternated between being amazed at how much carnage happened to the field and its elements, and being amazed at how well it all held up considering what it was going through. I know the New England fields' bottom-of-driver-stations diamond plate will never be the same again, even though during take-down we jump on it trying to get it straightened out again.
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