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 rookie teams are like kids - making them is easy but raising them to maturity can kill you - Wayne C. [more] |
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AIR Strike FIRST Team 78’s 2012 Robot
Striker Mk. III
We look forward to seeing everyone in Manchester and Boston!
(Photo by Joe Menassa)
Discussion
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28-02-2012 10:03
Ty Tremblay
Re: pic: AIR Strike 78 2012
Wow. Two CIMs on your shooter. Where are you shooting from?
28-02-2012 10:10
wilsonmw04
Re: pic: AIR Strike 78 2012
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Originally Posted by 1493kd
What wheels are you using? Hard to tell
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28-02-2012 10:19
sgreco
Re: pic: AIR Strike 78 2012
Wow, no kit chassis this year. Looks like a great bot!
28-02-2012 10:46
Daniel_LaFleur
Re: pic: AIR Strike 78 2012
As always, AIR strile looks formidable.
Good luck and see you at GSR.
28-02-2012 11:09
StealthMentor
Re: pic: AIR Strike 78 2012
Nice looking! It might be the angle of the picture but it does not look like your short bumper with the number 78 on it is 8" long from the corner of the frame? Please tell me I am wrong!
[R27]
Robots are required to use Bumpers to protect all exterior vertices of the Frame Perimeter. For adequate protection, at least 8 in. of Bumper must be placed on each side of each exterior vertex
28-02-2012 11:13
Nathan Streeter
Re: pic: AIR Strike 78 2012
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Originally Posted by wilsonmw04
Looks like 8" AM FIRST wheels with a custom tread.
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121 (the team from which 78 branched off of after the 2009 season) used a similar looking material on their kop wheels to acquire the trackballs in 2008 (http://www.chiefdelphi.com/forums/sh...ight=121+2008)... I wouldn't be surprised if they're the same material.
It looks like your entire upper assembly (loader and shooter) is on a turret... do you mind if I ask what the reasoning behind that decision was? Lower the weight of the turreting assembly? Improve consistency of feeding balls into your shooter?
Perhaps I should just wait to check out your robot at GSR... I'm quite curious about your shooter and drive motors, your drive wheels, how you handle the wiring for the upper assembly, and your seemingly sheet metal outer frame (new for you guys, if I recall correctly).
Nathan
28-02-2012 11:43
Wayne Doenges
Re: pic: AIR Strike 78 2012
Sweet machine and good looking shooter.
I also noticed that your front bumpers appear to be beveled to feed your harvester.
We asked the question and got this responce from the GDC:
Q. We have a harvester to pick up balls from the court. Is it permissible to bevel the bumpers at the entrance of the harvester to assist with the ball pickup as long as the bumper backing is at least 8 inches long? FRC1501 2012-02-04
A. Any cross-section of a Bumper backed by plywood must match that in Figure 4-5 (not beveled). Per Rule [R28-C], cushion material may extend up to 2-½ in. beyond the end of the plywood, which may be beveled
Good luck this year.
28-02-2012 11:56
Rick
Re: pic: AIR Strike 78 2012
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Originally Posted by Nathan Streeter
...used a similar looking material on their kop wheels to acquire the trackballs in 2008...
It looks like your entire upper assembly (loader and shooter) is on a turret... do you mind if I ask what the reasoning behind that decision was? ...I'm quite curious about your shooter and drive motors, your drive wheels, how you handle the wiring for the upper assembly, and your seemingly sheet metal outer frame (new for you guys, if I recall correctly). |
Like all teams with wheeled shooters, the shooting distance will be dependent on the balls at the event.
The front bumpers are 8 inches long and are not beveled. The angle of the shot and tightness of the fabric may make the bumper appear as though it is beveled. The plywood and pool noodle are both cut to 8”.
The shooter wheels are standard rubber 8” AM wheels. The coloring you see on them is due to some rather extensive testing and our workspace (Navy warehouse – not the cleanest spot). Didn’t have time to clean before the glamour shot…
We decided to rotate the feed and the turret together to ensure the ball was consistently hitting the shooter wheels the same way on every shot. Also, if for some reason the turntable bearings broke (including our spares), or we needed to remove the turret feature due to weight, the turret could be mounted directly to the chassis.
The turret wiring is attached to the turret with powerpole connectors. This allow for a quick disconnect if needed. All wiring to the camera, LEDs, shooter motors runs through conduit on the sides of the turret.
The non kit chassis is a new endeavor for us. We received a CNC machine this fall and incorporated it into our workshop. If you look closely, you can see the weight reduction in the chassis, bridge device, and turret. The chassis plates are ¼” aluminum held together with extrude aluminum. It was nice being able to have a consistent hole pattern on all our machined parts.
The drive wheels are four 8” pneumatic wheels and two AM 8” plastic wheels. The plastic wheels are there to aid with turning. For the last 3 years, we have had this type of wheel in the back of the drive train with great success.
Nathan, stop by the pit and say hi. Our student pit crew can give you a tour of the machine. I will be by the 1519 pit to check out your machine as well.
28-02-2012 12:36
Lil' Lavery
Re: pic: AIR Strike 78 2012
Awesome work. Can't wait to to see what it can do on the field. Wish I could convince NAVSSES to let us use a warehouse.
How well does loading from the floor work when your turret/tower isn't at a right angle compared to your loader?
28-02-2012 12:54
mott
Re: pic: AIR Strike 78 2012
About how many driving hours have you been able to put on that machine?
That design (with the turret at the bottom of the tower) was exactly what we were going to do originally until we realized that we needed to support the top of our tower to prevent it from snapping off at the frame/turret during rough driving/collisions/bump crossings/etc. The weight of that shooting head (especially with 2 CIMs up there) will induce incredible forces on the base of your tower during rough play.
Great looking machine though for sure!
Congrats.
28-02-2012 13:02
TD78
Re: pic: AIR Strike 78 2012
Our NAVSEA sponsor graciously pays the rent on our warehouse workspace. We have enough space for our workshop, 1 FRC team, 3 VEX teams, and 2 FTC teams. They were also instrumental in getting us a (new) CNC machine...a 1995 Wells-Index. Taken some time to learn how to use...it's been a fun learning experience.
I believe the turret is coded to revert back to center in order to pick up.
We have some driving time on the lazy susan bearing, but it was never beaten up like it could at a competition. It's a rather beefy bearing...got it through McMaster. We'll see!
28-02-2012 13:16
BrendanB
Re: pic: AIR Strike 78 2012
Very elegant robot 78! Can't wait to see this in a few days!
28-02-2012 13:30
Brandon Holley
Re: pic: AIR Strike 78 2012
Rick and Co. -
Looks awesome as usual! Unique take on the rotating turret/shooter assembly. Do you guys drive over the barrier as well?
I'll be buy to check it out in person this weekend.
-Brando
28-02-2012 13:34
CalTran
Re: pic: AIR Strike 78 2012
It may be just the picture, but what is the little protrusion and flat piece of aluminum at the very top of of your robot for?
28-02-2012 13:35
JamesCH95
Re: pic: AIR Strike 78 2012
Sweet looking 'bot!
See you at GSR again, maybe for another collaboration? 
28-02-2012 15:20
waialua359
Re: pic: AIR Strike 78 2012
Nicely engineered and clean cut as always.
Just a quick question, what made you folks decide to have a turret for the entire shooter mechanism as opposed to a turret head? In 2009, we had a setup like yours but opted to go with the head only instead for this season.
28-02-2012 15:29
Ty Tremblay
Re: pic: AIR Strike 78 2012
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Originally Posted by waialua359
Just a quick question, what made you folks decide to have a turret for the entire shooter mechanism as opposed to a turret head? In 2009, we had a setup like yours but opted to go with the head only instead for this season.
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Originally Posted by Ricksta
We decided to rotate the feed and the turret together to ensure the ball was consistently hitting the shooter wheels the same way on every shot. Also, if for some reason the turntable bearings broke (including our spares), or we needed to remove the turret feature due to weight, the turret could be mounted directly to the chassis.
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28-02-2012 15:48
BrendanB
Re: pic: AIR Strike 78 2012
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Originally Posted by waialua359
Nicely engineered and clean cut as always.
Just a quick question, what made you folks decide to have a turret for the entire shooter mechanism as opposed to a turret head? In 2009, we had a setup like yours but opted to go with the head only instead for this season. |
28-02-2012 15:53
waialua359
Re: pic: AIR Strike 78 2012
Sorry for not reading ALL of the posts above.
There are two things we did to address some issues we had in 2009.
We went with just a turret head this year to limit the issues with bearings falling out from the entire feeding/shooter mechanism. Seems like you have that addressed already.
Our other revision for this year was mounting aluminum reinforcement ring plates both on the outer and inner part of the turntable to prevent warping of any sort and no bearings falling out, due to HEAVY defense and hitting on OUR part.
13-03-2012 15:48
Grimey78
Re: pic: AIR Strike 78 2012
We are useing 2 traction wheels
But the sims were switched out to be placed on the drive train
15-03-2012 07:18
78Grimey78
Re: pic: AIR Strike 78 2012
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Originally Posted by Ty Tremblay
Wow. Two CIMs on your shooter. Where are you shooting from?
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anywhere we want if doesnt matter
15-03-2012 07:23
78Grimey78
Re: pic: AIR Strike 78 2012
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Originally Posted by 1493kd
What wheels are you using? Hard to tell
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19-03-2012 10:10
78Grimey78
Re: pic: AIR Strike 78 2012
[quote=1493kd;1136064]What wheels are you using? Hard to tell[/
gray traction wheels with a fisherprice motar
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