Forum: Pneumatics
24-01-2014, 06:56
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Replies: 26
Views: 4,696
Re: Filling Robot Pneumatic Systems
I understand that as written, this is a grey area within the rule. The grey area was removed at LRI training this year (and is consistent with prior years). Conveniently, the same guidance that was...
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Forum: Pneumatics
23-01-2014, 22:27
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Replies: 26
Views: 4,696
Re: Filling Robot Pneumatic Systems
Tom,
Since it looks like you are going the Centerline for week 1 where I will be the LRI I would like to tell you that I see no provisions in the rules for off board storage of air, just provisions...
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Forum: General Forum
09-09-2013, 16:43
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Replies: 4
Views: 1,559
Re: Battery Stations
Here are some pics I have taken over time.
http://picasaweb.google.com/Mark.Kramarczyk/BatteryCartBenchmarking#
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Forum: Technical Discussion
21-06-2013, 13:26
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Replies: 9
Views: 2,785
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Forum: Sensors
20-06-2013, 13:54
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Replies: 8
Views: 2,827
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Forum: General Forum
03-03-2013, 14:27
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Replies: 8
Views: 2,107
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Forum: General Forum
16-01-2013, 09:18
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Replies: 9
Views: 1,007
Re: Available Michigan Practice Fields?
The MEZ has space for about 1/4 field. Given the size of this year's field elements this year it ends up being more of a testing field than a practice field. They do have the team built elements...
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Forum: Technical Discussion
26-11-2012, 22:14
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Replies: 40
Views: 5,257
Re: PVC Rollers?
We buy the belt in bulk so we mount the rollers and wrap the large piece of belting in place and mark it with a sharpie. We pull it snug, but do not attempt to tension the belt at this point. Then...
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Forum: Technical Discussion
26-11-2012, 14:32
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Replies: 40
Views: 5,257
Re: PVC Rollers?
How do we make grooves to retain our polycord?
We don't. We use flat belting.
We use McMaster-Carr p/n: 6075K19 flat belting on a simple PVC pipe. To control the belt tracking we put 3-4 wraps of...
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Forum: Inventor
18-11-2012, 12:27
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Replies: 5
Views: 1,336
Re: Sheet Metal and Autodesk
We've done Cardboard Aided Design in the past, although most notably for large plastic parts. The best example is our 2010 control board which we made for 1/8" ABS. We modeled what we wanted in...
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Forum: Games/Trivia
12-11-2012, 21:14
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Replies: 19
Views: 1,457
Re: CD's Unofficial Caption Contest #436
Overheard during a shop tour...
Guide: And here we have our two programmers playing their favorite practical joke on the mechanical guys.
Guest: I don't understand, it looks like they are just...
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Forum: Off-Season Events
24-09-2012, 10:21
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Replies: 11
Views: 2,771
Re: 3 Longs triple Balance
House of Cards had this ability during the regular season. We were on an alliance with them at the Livonia District and while we were successful with the triple on the practice field, the pressures...
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Forum: Technical Discussion
07-09-2012, 21:10
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Replies: 33
Views: 9,763
Re: Turning Quality Metrics
In reviewing this thread I see the discussion boiling down to seven metrics.
Peak Turning Torque
Speed of Turn (given angle)
Rock During Turn
Overshoot (angular)
Hopping During Turn...
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Forum: Team Organization
23-08-2012, 22:12
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Replies: 36
Views: 6,678
Re: Advice for a team that has lost its school
Realize that it will be an uphill battle, but keep the faith among the team that you will succeed in the end.
3096 was created in 2009 and since then we have had 2 school buildings, 2 build...
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Forum: Technical Discussion
15-08-2012, 20:53
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Replies: 33
Views: 9,763
Re: Turning Quality Metrics
Do you have a video link showing the awesomeness?
John, you don't want no scrub? Scrub from a chassis don't get no love from you? Hanging out field side, watching Wrangler drive, explaining CoF to...
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Forum: Technical Discussion
14-08-2012, 19:55
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Replies: 33
Views: 9,763
Turning Quality Metrics
On CD we talk about drivetrains a lot. Straight line metrics are pretty common in these discussions: top speed, acceleration time to top speed, max pushing force, time to distance, etc. But what...
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Forum: Technical Discussion
14-08-2012, 17:04
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Replies: 72
Views: 14,824
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Forum: Technical Discussion
14-08-2012, 13:31
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Replies: 72
Views: 14,824
Re: Coefficient of Friction Testing
Do you guys actually measure the angle and then do the trig? Wouldn't measuring the rise over run with a carpenters square provide better resolution. Rise / run = tan theta = CoF
An 1/8"...
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Forum: Technical Discussion
13-08-2012, 12:58
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Replies: 72
Views: 14,824
Re: Coefficient of Friction Testing
The last time I did qualitative traction testing was in 2009. See this post. (http://www.chiefdelphi.com/forums/showpost.php?p=855679&postcount=21)
Since then I have not needed to build a traction...
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Forum: FIRST Lego League
12-08-2012, 19:30
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Replies: 7
Views: 3,546
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Forum: Technical Discussion
01-08-2012, 22:15
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Replies: 26
Views: 13,083
Re: Design Process: 2012 Shooters
I know several very good teams have already responded to this thread, but I wanted to put this up just for contrast.
After we read the rules we discussed our team's goals for robot performance this...
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Forum: Technical Discussion
25-07-2012, 10:08
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Replies: 1
Views: 2,061
Re: [ER] Fishbone or Ishikawa diagram
I am kind of surprised that this thread went without comment. Perhaps it was because of the stunned surprise some of us experienced from reading the report findings.
To back up Ike's point of the...
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Forum: Technical Discussion
21-06-2012, 11:00
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Replies: 11
Views: 2,601
Re: AM Shifter: 2:56:1 spread vs. 4:1 spread
I would also caution you to look at your output power vs. speed with the two ratios. The 4:1 has a pretty big power trough between the peak powers. If your system spends a lot of time in this zone...
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Forum: General Forum
05-06-2012, 21:24
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Replies: 57
Views: 10,031
Re: CAD Revision Control
The kit of parts checklist (http://www.usfirst.org/sites/default/files/uploadedFiles/Robotics_Programs/FRC/Game_and_Season__Info/2012_Assets/KickoffKitChecklistRev_A.pdf) says there was an envelope...
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