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Search took 0.04 seconds; generated 74 minute(s) ago. search: Posts Made By: Jared Russell
Forum: General Forum 04-22-2016, 08:34 PM
Replies: 48
Views: 12,066
Posted By Jared Russell
Re: Integrating Computer Vision with Motion Control - FIRST Championship Conference

We will DEFINITELY deal with this one :)
Forum: General Forum 04-22-2016, 08:24 PM
Replies: 111
Views: 33,104
Posted By Jared Russell
Re: 2016 Newton Subdivision

The World Champion alliance will come from Newton.
Forum: General Forum 04-22-2016, 02:52 PM
Replies: 48
Views: 12,066
Posted By Jared Russell
Integrating Computer Vision with Motion Control - FIRST Championship Conference

Are you having a tough time coordinating vision with motion?
http://i.imgur.com/8BiHks1.jpg

Does buggy vision make your robot grasp at things that aren't...
Forum: Championship Event 04-21-2016, 11:49 PM
Replies: 181
Views: 30,909
Posted By Jared Russell
Re: Being Proactive About Paper Airplanes on Einstein

Do audience selection of defenses on Einstein by having two large circles on the ground labelled "1" and "2". Whichever circle ends up with more paper airplanes in it wins, and that defense is...
Forum: General Forum 04-21-2016, 11:23 PM
Replies: 49
Views: 6,760
Posted By Jared Russell
Re: Catapult vs Wheeled Shooter

Citation needed?

If you look at the top 20 teleop high goal OPR teams, only 5 of them (195, 1024, 118, 148, 230) are catapults.

If anything, side-by-side dual wheel shooters a la 971, 987, and...
Forum: General Forum 04-21-2016, 11:11 PM
Replies: 49
Views: 6,760
Posted By Jared Russell
Re: Catapult vs Wheeled Shooter

We know how to build, tune, and debug a wheeled shooter, and they've been good to us in the past. We don't know how to build, tune, and debug a catapult. We could probably figure it out, but early...
Forum: Programming 04-19-2016, 04:47 PM
Replies: 14
Views: 2,706
Posted By Jared Russell
Re: Angle Calculation from image of goal

I will try to post a more detailed explanation tonight, but for now: it affects both coordinates.

Imagine a camera that is looking straight up. What does the x coordinate mean with respect to the...
Forum: Motors 04-16-2016, 02:29 PM
Replies: 8
Views: 1,003
Posted By Jared Russell
Re: Bang Bang Control, motors, and transmissions

Given the duty cycle and lifespan of an FRC robot, bang-bang controllers are totally appropriate in many applications. In an industrial setting, I might worry about shortening mechanical lifespans,...
Forum: Programming 04-15-2016, 10:14 PM
Replies: 23
Views: 2,277
Posted By Jared Russell
Re: Problem with NavX to turn around.

I would argue that PID is much more elegant in practice than in theory :)
Forum: Programming 04-11-2016, 04:55 PM
Replies: 14
Views: 2,706
Posted By Jared Russell
Re: Angle Calculation from image of goal

There is a reason why our vision system this season uses a device that provides APIs to fetch pixel array size and focal length information from per-device factory calibration :)
Forum: Programming 04-11-2016, 04:29 PM
Replies: 14
Views: 2,706
Posted By Jared Russell
Re: Angle Calculation from image of goal

This can be a decent enough approximation, but there is a more correct way to do this conversion:


horizontal_angle_to_goal = atan((goal_x - center_x) /...
Forum: General Forum 04-05-2016, 02:48 PM
Replies: 29
Views: 3,804
Posted By Jared Russell
Re: Westtown MAR District Won on Eliminations Tiebreaker Rules

https://en.wikipedia.org/wiki/Away_goals_rule
Forum: Robot Showcase 04-04-2016, 04:33 PM
Replies: 57
Views: 10,174
Posted By Jared Russell
Re: Interesting/Cool Scaling Mechanism Designs

http://www.reactiongifs.us/wp-content/uploads/2014/12/wacky_waving_inflatable_arm_flailing_tube_man.gif
Forum: Programming 03-28-2016, 10:07 AM
Replies: 45
Views: 6,418
Posted By Jared Russell
Re: Pathfinder - Fast Motion Profiling for Java and C++, Tank and Swerve Drive

Cool!
Forum: Motors 03-25-2016, 12:37 PM
Replies: 12
Views: 1,230
Posted By Jared Russell
Re: Digital Servo Holding position after disable

We had this problem with the servo on our hood until we got a Hitec servo compatible with this guy so we could reprogram it: https://www.servocity.com/html/hpp-21_servo_programmer.html#.VvVqMJYrKL8
Forum: General Forum 03-24-2016, 12:22 PM
Replies: 172
Views: 20,686
Posted By Jared Russell
Re: How do I help my area move to districts?

So much this.
Forum: Extra Discussion 03-23-2016, 12:15 PM
Replies: 10
Views: 1,822
Posted By Jared Russell
Re: pic: FRC 4418 2016 robot for Colorado

Great reveal video, or greatest reveal video?
Forum: Rules/Strategy 03-22-2016, 09:03 PM
Replies: 161
Views: 23,913
Posted By Jared Russell
Re: Your tall opaque robot is now illegal

Any robot made of matter exerts gravitational pull that messes with my accelerometer, and is therefore illegal.

(There, I think I've taken the pedantry to its logical conclusion)
Forum: General Forum 03-22-2016, 06:35 PM
Replies: 57
Views: 6,596
Posted By Jared Russell
Re: What's Your Most Unusual Field Debris?

Yep, and 341 also did the same thing to our turret bearing in 2006 at the Chesapeake Regional as well.

Incidentally, putting a 3 foot tall, 20 lb+ assembly on top of a McMaster lazy susan bearing...
Forum: General Forum 03-21-2016, 06:44 PM
Replies: 64
Views: 8,766
Posted By Jared Russell
Re: Old Man Notices A Thing: Lots of Robot Names

But are you referring to what robots are named, what their names are called, what robots are called, or what the robots are?
Forum: Programming 03-21-2016, 11:45 AM
Replies: 5
Views: 743
Posted By Jared Russell
Re: Help with GRIP HSL values?

Your vision target is overexposed in this image. Notice how the green washes out to white on the target on the right. This happens because there are blue (and even a small amount of red) components...
Forum: General Forum 03-15-2016, 05:20 PM
Replies: 43
Views: 8,664
Posted By Jared Russell
Re: Team Update 16 (2016)

This is a good change.
Forum: General Forum 03-14-2016, 03:07 PM
Replies: 59
Views: 10,512
Posted By Jared Russell
Re: Hardest Shooting Robots

5817's "bench grinder" is absolutely the hardest shooter I have ever personally witnessed on an FRC robot...ever.
Forum: Regional Competitions 03-14-2016, 01:40 PM
Replies: 39
Views: 9,390
Posted By Jared Russell
Re: Central Valley Regional 2016

We did not scale at the Central Valley Regional.
Forum: General Forum 03-10-2016, 01:02 PM
Replies: 92
Views: 9,280
Posted By Jared Russell
Re: Cheesecake robot. How far is too far?

Ethics and rules aside...

ain't nobody got time for that.
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