Forum: General Forum
07-13-2010, 05:32 PM
|
|
Replies: 13
Views: 2,088
Re: Wheel encoder to Jaguar Wiring
Hmm... OK, we tried that. Setting kI & kD to 0 and then trying kP at anything > than .8 caused really bad results (back chatter of wheels) at low RPMs. I have to admit that I'm at a bit of a loss...
|
|
Forum: General Forum
07-13-2010, 04:33 PM
|
|
Replies: 13
Views: 2,088
Re: Wheel encoder to Jaguar Wiring
We did that too. Everything looked good. But, when you tried to get it to actually work in motion, the wheels started to chatter terribly. It's possible that there was some issue with a couple of...
|
|
Forum: General Forum
07-13-2010, 03:58 PM
|
|
Replies: 13
Views: 2,088
Re: Wheel encoder to Jaguar Wiring
Thanks, that's what I thought. But, I've been completely unsuccessful at closing the loop with the Jaguars and a Mechanum drive. It seems to work OK at very high speed, but I get a lot of backlash...
|
|
Forum: General Forum
07-12-2010, 08:39 PM
|
|
Replies: 13
Views: 2,088
Wheel encoder to Jaguar Wiring
Hi Gang,
Has anyone had success wiring a US Digital quadrature encoder to the PID input on a Jaguar? If so, what wiring did you use? The Jag has 5 lines, +5, A, B, I, Gnd. Are the A & B the...
|
|
Forum: Technical Discussion
05-21-2010, 04:53 PM
|
|
Replies: 9
Views: 1,112
Re: Additions to the KOPs for next year?
Yeah, it's probably impossible to make things completely student proof. But then, the failures can be better teachers than the successes :D
BTW, I've been in contact with Kate and she's looking...
|
|
Forum: Technical Discussion
05-21-2010, 04:06 PM
|
|
Replies: 9
Views: 1,112
|
|
Forum: Technical Discussion
05-21-2010, 03:18 PM
|
|
Replies: 9
Views: 1,112
|
|
Forum: Technical Discussion
05-21-2010, 01:48 PM
|
|
Replies: 9
Views: 1,112
Additions to the KOPs for next year?
Greetings!
I had an interesting conversation with a fellow from Stone Ridge Technology (http://www.stoneridgetechnology.com/) yesterday. His company was planning to build a Beagleboard clone...
|
|
Forum: Programming
05-17-2010, 07:25 PM
|
|
Replies: 42
Views: 6,217
Re: Making autonomous accessible to all teams
Hmm... Well, there is certainly some controversy over what constitutes a "robot". The Robotics Institute of America seems to believe that a robot's "common characteristic is that by its appearance...
|
|
Forum: C/C++
05-17-2010, 06:29 PM
|
|
Replies: 5
Views: 1,497
Re: DIY Static Library
Actually, I use both. But, the Makefile approach used by WRS *is* the same as you find in Linux right down to the whitespace (e.g., tabs *not* spaces). Both use the GNU make facility and the...
|
|
Forum: C/C++
05-14-2010, 11:24 PM
|
|
Replies: 5
Views: 1,497
Re: DIY Static Library
Absolutely. I've created two libraries for our team. Although I sure that you can create them from the Workbench environment, I find it is easier from the command line. I've included the Makefile,...
|
|
Forum: Programming
05-11-2010, 09:13 PM
|
|
Replies: 34
Views: 4,788
Re: Using A PS3 With The cRio
The Beagleboard has all kind of access to TI's video & audio CODECs under Linux. With the OMAP 3530 on the Beagleboard, you've even got a TI C6X DSP. This is one of the reasons for my low-cost...
|
|
Forum: CAN
05-10-2010, 02:08 AM
|
|
Replies: 27
Views: 3,692
Re: Set Jaguar device number via cRIO
Watch out for the 100 Ohm resistor legs if you tried to put the resistor into the 6P6C connector itself. I experienced many problems with the resistor shorting itself out if I tried building it...
|
|
Forum: Programming
05-06-2010, 01:31 PM
|
|
Replies: 46
Views: 7,385
Re: Statistics on top 20 teams?
Good point on causality vs correlation. I added a comment to the post to that effect.
As for Java, I suspect that few wanted to be the guinea pigs on Java in the first year out. I know a few teams...
|
|
Forum: CAN
05-06-2010, 01:23 PM
|
|
Replies: 5
Views: 1,414
Re: CANJaguar code with synchronization
I've posted the code as an attachment to the CANJaguar tracker at FirstForge.
http://firstforge.wpi.edu/sf/tracker/do/listArtifacts/projects.canjaguar/tracker.canjaguar_for_c
I hope it's of some...
|
|
Forum: Programming
05-06-2010, 12:56 PM
|
|
Replies: 46
Views: 7,385
Summary: Top Team statistics!
Hi Gang!
Preface
OK, thanks to all those folks who responded. I started this thread to see if there were any common characteristics of the teams that experienced a modicum of success in this...
|
|
Forum: Programming
05-01-2010, 08:00 PM
|
|
Replies: 54
Views: 8,182
|
|
Forum: Programming
05-01-2010, 06:28 PM
|
|
Replies: 54
Views: 8,182
|
|
Forum: Robotics Education and Curriculum
04-30-2010, 02:50 PM
|
|
Replies: 11
Views: 2,086
|
|
Forum: Technical Discussion
04-30-2010, 01:16 AM
|
|
Replies: 11
Views: 1,749
Re: IR Scanning Method Of Object Recognition
The way we did this was to use one of the Sharp long-range IR scanners to find an object within range of the sensor. Basically, start at the far left angle of your servo (IR sensor is mounted on the...
|
|
Forum: CAN
04-30-2010, 01:00 AM
|
|
Replies: 5
Views: 1,414
CANJaguar code with synchronization
Hi Gang,
I have a version of the CANJaguar code that does all of the control modes (position, speed, voltage and current) as well as adding the synchronization option to send messages to all of...
|
|
Forum: FRC Control System
04-30-2010, 12:50 AM
|
|
Replies: 37
Views: 4,428
Re: Feedback Thread: Robot Control System
Does anyone know if the radios were all set to the same wifi channel for the FMS? I'm assuming so because then each of the robot radios would then associate with a single access point. With 6...
|
|
Forum: FRC Control System
04-30-2010, 12:40 AM
|
|
Replies: 37
Views: 4,428
Re: Feedback Thread: Robot Control System
In the case of the Video camera and its Ethernet connection to the cRIO, the routing in the cRIO is bolluxed. A routing table modification in the cRIO will allow the camera output to be directly...
|
|
Forum: FRC Control System
04-30-2010, 12:33 AM
|
|
Replies: 37
Views: 4,428
Re: Feedback Thread: Robot Control System
The Ethernet connection on the Classmate was troublesome in that we found quite a few teams where the Ethernet connector had physically broken. The Ethernet cable just wouldn't stay inserted. This...
|
|
Forum: Programming
04-30-2010, 12:22 AM
|
|
Replies: 30
Views: 6,073
Re: Feedback Thread: WPILib
One of the things that I found difficult to work with in WPILib was the approach for creating and maintaining threads. There is a good model for this in C++ in the form of the Open Source Thread...
|
To anyone who is discouraged about their team, don't let yourself get down. I've seen my team go from having a robot that barely moved (and I'm not kidding, we had keys falling out of gearboxes) to this year with a robot that is ACTUALLY GOING TO WORK. Don't lose hope, stick with FIRST! - ZipTie3182 [more] 
