Papers Discussed
Cheesy Drive
http://www.chiefdelphi.com/media/papers/2536 (Not really a description but code is there, along with scripting and some other cool stuff)
Hibner Scripting
http://www.chiefdelphi.com/media/papers/2553
Hibner Simulation
http://www.chiefdelphi.com/media/papers/2494 (For additional reading)
Palardy Scripting
http://www.chiefdelphi.com/media/papers/2497
Enginerds Open Source
https://github.com/Team2337/2012ReboundRumble
Daisy Vision
http://www.chiefdelphi.com/media/papers/2676
Links to US Digital Encoders
http://usdigital.com/products/encode...rotary/kit/E4P
http://usdigital.com/products/encoders
Chat Transcript
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<SabreBytes772> and if the name didn't make sence
<Guest 12> ok cool thanks!
<AndrewLawrence> *sense. Aaron, do we always need to correct your spelling?
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<SabreBytes772> yes please
<wing1002> Hi Andrew. Hi Chris. Hi Jared. Hi Zachary!
<ZachO> Haha. Loving the chat.
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<michaelblake3481> Would adding magnetometer help with the slippage?
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<apalrd> no, a magnetometer is usually less accurate than a gyro
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<michaelblake3481> What brand encoders for the drive train?
<schreiaj> define accurate
<apalrd> more noise, more error
<schreiaj> magnetometer tends to be good over long periods of time, gyros are great in short term
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<michaelblake3481> Not possible/helpful to use BOTH gyro and magnetometer for real-time accuracy?
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<Guest 3> in FRC probably not that useful
<schreiaj> it is, but magnetometers in FRC are hard due to EMI
<Guest 3> in real world systems with much, much longer run times, they ar emore useful
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<michaelblake3481> What brand encoders for the drive train do the guests use?
<Guest 4>
Andymark
<ZachO> We ran these last year: http://www.andymark.com/product-p/am-0180.htm
<michaelblake3481> Thought that's what they said... so, U.S. Digital, right?
<schreiaj> us digital is solid stuff
<AndrewLawrence> ^
<michaelblake3481> Okay... THANKS!
<AndrewLawrence> U.S. Digital makes great encoders.
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<Guest 6> Do you have trouble with a sensor being shut down in error?
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<SabreBytes772> This yea we tried to "record" an Autonomous mode. We (Driver's) would drive the robot through a cycle and then e could replay it.
<SabreBytes772> It didn't work perfectly enough to use for competition
<ZachO> We talked about doing that for a while
<SabreBytes772> we just used times for Auto
<wing1002> what I use is a system of 'stages'
<wing1002> i divide autonomous into threaded stages
<wing1002> and each stage , upon completion, throws a flag, and once all the threads catch a flag, the stage is incremented
<wing1002> that's how I did auto
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<Guest 12> do you test one thing at a time? like once driving forward works consitantly, then add something?
<ZachO> Yes
<ZachO> We go through it systematically
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<ZachO> If anyone wants to see 2337's auton scripts they're online https://github.com/Team2337/2012ReboundRumble/tree/master/Autonomous%20Scripts
<michaelblake3481> Do the guests believe it's important for EVEN Top 8 teams at Regionals/CMP Divisions to already have in place mechanics/programming...
<michaelblake3481> ...to feed their game piece(s) to a stronger Autonomous scorer?
<Guest 3> either have it already written, or have a framework that lets you write one in <5 minutes
<michaelblake3481> Anyone else lose audio?
<SabreBytes772> linky?
<schreiaj> refresh page michael
<schreiaj> sabre, ill hunt down a link in a bit
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<SabreBytes772> alright thx
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<SabreBytes772> we press play and hope for the best?
<SabreBytes772> well Enable, not "play
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<Guest 12> whos from 341?
<schreiaj> guest 3, jared russel
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<SabreBytes772> it was delayed for us when we tried doing our vision on the dashboard. now we're trying to learn how to use a beagleborad
<Guest 6> We took pictures and modified them in photoshop to obscure goals
<michaelblake3481> Rather than adding Beagleboard (additional failure point) wouldn't it be better to upgrade the laptop to perhaps "gamer" level?
<Guest 3> we used a core 2 duo laptop in our driver station rather than the classmate (341)
<apalrd> you're more limited by radio bandwidth
<apalrd> we ran a core 2 duo as well
<Guest 3> worth noting: in 2013 you are limited to 10mbps per team
<Guest 3> in 2012 there was no limit
<Guest 6> Guest 3, where was the limit announced?
<michaelblake3481> 10mbps is a good amoint, right?
<michaelblake3481> *amount
<Guest 3> i am trying to find it
<Guest 3> i want to say it was in the dump of information after the einstein investigation
<Guest 3> for reference, with our dark 640x480 30fps camera feedback we were pulling ~6mbps
<Guest 3> only an issue if you have several cameras, high resolutions, high fps, and poor compression
<Guest 6> The einstein report said they were investigating bandwidth limits, but didn't list what they will be, or even if there will be limits
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<jimzondag> yes, all teams need to be able to stand still if needed
<Guest 28> where are these resources?
<ZachO> Chief Delphi
<jimzondag> cd white papers
<Guest 28>
Could you please post the links?
<schreiaj> ill do my best to hunt them down after the call
<Guest 28>
Thank you very much
<SabreBytes772> write them down on a post it note to not forget which one's your looking for lol
<SabreBytes772> Thanks
<ZachO> http://www.fightingpi.org/Resources/Controls/Beta/2013_Beta/11-4-12_Day_10.shtml
<Guest 28>
Is there any paper describing chesydrive in detail?
<schreiaj> im out of hands someone write them down for me :P
<Guest 3> there are some threads on Delphi
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<Guest 6> http://forums.usfirst.org/showthread.php?t=19891
<SabreBytes772> LabView made it I saw a video of them presenting it
<SabreBytes772> ours were really close this year. Mentor changed it for us -.-
<SabreBytes772> he changed up the shooter for his way. instead of the design
<Guest 6> For the quick switch code, what do you use to trigger the practice vs real robot decision?
<schreiaj> In 79's case, we don't build a practice bot. Our CSV was on the CRIO, I never know constants
<ZachO> It's not automatic
<ZachO> We have to set it in the code.
<Guest 29> May use Kinetic to select a target similar to the remote in 2008.
<Guest 29> Don't forget, there is a remote in FIRST Choice.
<SabreBytes772> 3 minute matches.
<Guest 29> ugh
<Guest 29> 2011 & 2012 had excellent auton tasks
<SabreBytes772> agreed
<SabreBytes772> Final words: Auto/Hybrid is useful. the end.
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<jimzondag> most matches can be won by only doing auton and endgame
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This pic became proof that engineers should never give up thier day jobs! :p - Jay H 237 [more] 
25-11-2012, 22:17
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