Forum: General Forum
01-29-2016, 09:06 AM
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Replies: 49
Views: 8,407
Re: Andymark rhino drivetrain discussion
I too am interested to see how these treads work out with full-weight robots, especially with open-field hits.
What makes me nervous is the turnbuckle used to tension the treads that relies on the...
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Forum: General Forum
01-24-2016, 02:57 PM
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Replies: 2
Views: 797
Re: Winch ideas
http://www.chiefdelphi.com/media/papers/1592
Note the key ingredient: DeWalt transmissions have anti-backdrive pins.
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Forum: CAD
01-24-2016, 10:53 AM
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Replies: 0
Views: 548
Grayhill 63R STP Model
After spending too much time looking for a Grahill encoder model I thought that it may be helpful to post a link to the STP file I found.
http://www.grayhill.com/assets/1/7/63R.stp
Hope this helps...
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Forum: General Forum
01-21-2016, 07:29 PM
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Replies: 35
Views: 7,468
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Forum: Technical Discussion
01-21-2016, 09:33 AM
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Replies: 19
Views: 2,125
Re: Gearing a Rotating Arm
1) JVN Design Calc is very good for this sort of thing
2) Read and understand your chosen transmission's applications manual ::rtm:: there are a number of motor/gearing combinations that quickly...
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Forum: Technical Discussion
01-17-2016, 05:27 PM
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Replies: 8
Views: 2,187
Re: Measured Boulder OD
Again, thank you all for the measurements.
The biforcated data is quite interesting, even if our dataset isn't quite statistically significant.
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Forum: Technical Discussion
01-14-2016, 04:33 PM
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Replies: 8
Views: 2,187
Re: Measured Boulder OD
Bump so more people see the survey. Getting more data than posts, which is good! Thank you all so far.
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Forum: Technical Discussion
01-13-2016, 05:36 PM
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Replies: 8
Views: 2,187
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Forum: Technical Discussion
01-13-2016, 07:58 AM
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Replies: 8
Views: 2,187
Measured Boulder OD
It can be dangerous to design game piece manipulators to the game piece dimensions called out in the game manual. These dimensions should only be considered nominal and rarely reflect real...
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Forum: Robot Showcase
04-20-2015, 09:53 AM
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Replies: 81
Views: 23,602
Re: Team 95 Hard At Work - 2015
Lack of money and time happened, unfortunately. :(
Our team is about 13 students, 5 technical mentors, and 4-6 non-technical mentors. None of the three on our programming crew could make St. Louis,...
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Forum: General Forum
04-08-2015, 01:28 PM
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Replies: 41
Views: 7,061
Re: Tote bot
In your shoes I'd run 2x cimple boxes wiht 1 cim each and with the stock reduction to 2WD. Simple, light, reliable. Put a caster wheel or skid (or omni-wheels) in the "back" where your two driven...
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Forum: General Forum
04-08-2015, 10:55 AM
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Replies: 41
Views: 7,061
Re: Tote bot
I wouldn't think of "raising and lowering the drive train" but instead I would think of "raising and lowering the tote."
Here is a masterfully done CAD rendering of an idea:...
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Forum: General Forum
04-08-2015, 10:04 AM
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Replies: 41
Views: 7,061
Re: Tote bot
I seriously doubt that this function will "require" a pneumatic system. I am sure that you'll be able to come up with at least four different ways to do this without pneumatics. Don't limit...
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Forum: General Forum
04-07-2015, 10:14 AM
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Replies: 24
Views: 4,247
Re: New Team Name? (Poll)
You are NOT alone.
Simple, concise, no inside jokes, nothing that could be construed as offensive, and ideally something memorable.
Of all the options in the poll I thought Unobtanium fit this...
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Forum: General Forum
04-07-2015, 10:11 AM
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Replies: 24
Views: 4,247
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Forum: Off-Season Events
04-06-2015, 03:41 PM
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Replies: 227
Views: 29,778
Re: IRI - 2015 Rule Modification Ideas?
Allow can-on-can stacking to count for points.
Allow more than one piece of litter per can.
Make litter in the landfill worth 5pts and litter on the floor worth 1pt. This would strongly discourage...
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Forum: Extra Discussion
04-06-2015, 12:35 PM
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Replies: 23
Views: 6,470
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Forum: General Forum
04-02-2015, 04:22 PM
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Replies: 56
Views: 10,521
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Forum: Extra Discussion
04-01-2015, 01:28 PM
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Replies: 5
Views: 2,319
Re: pic: One of the best matches ever!
Judging by OPs team number and job I'd guess he's really proud of their litter score.
This thread: http://www.chiefdelphi.com/forums/showthread.php?threadid=136220 might be eye-opening for OP.
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Forum: Electrical
04-01-2015, 08:21 AM
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Replies: 12
Views: 2,136
Re: 6 gauge wire for battery
Excellent. Just make sure that the terminals you use will be compatible with the crimper and you'll be good to go.
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Forum: General Forum
03-31-2015, 03:46 PM
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Replies: 24
Views: 4,501
Re: Changing a culture of cynicism
A few things I will note:
The great teams in FIRST and FRC are not stepping on the necks of lesser teams, the great teams are reaching down to lift the lesser teams up on their shoulders. Imparting...
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Forum: Electrical
03-31-2015, 10:01 AM
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Replies: 12
Views: 2,136
Re: 6 gauge wire for battery
If you're making your own battery terminals I would strongly encourage you to get a good 6awg crimping tool. We use one like this:...
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Forum: General Forum
03-30-2015, 03:40 PM
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Replies: 21
Views: 3,928
Re: Highest Litter Scores
This data is interesting, but its utility and your conclusion are questionable unless 'canned litter' and 'thrown litter' points can be separated. Maybe it has been already?
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Forum: General Forum
03-30-2015, 01:23 PM
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Replies: 56
Views: 9,187
Re: Eliminations replay card
One more thing I'd like to add...
[CROTCHETY OLD MAN]
Back when I was a student we didn't have field coms checks, ever. It just wasn't part of the field control. Didn't plug in your battery? Didn't...
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Forum: General Forum
03-30-2015, 01:20 PM
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Replies: 48
Views: 5,452
Re: Competition volume
It makes no sense to not do what your customers are asking for. Time to pursue the steps outlined by jvriezen.
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You can learn a lot from making mistakes - even more from fixing them. - DarrinMunter [more] 
