Forum: Extra Discussion
Today, 04:13 PM
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Replies: 17
Views: 916
Re: pic: Quick-Change Chassis 2
There are 2 threads discussing this gearbox/chassis concept. I described our wheels in the other thread: https://www.chiefdelphi.com/forums/showthread.php?t=152912 ...
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Forum: Extra Discussion
Today, 01:02 PM
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Replies: 17
Views: 916
Re: pic: Quick-Change Chassis 2
Yes, I assumed our pit crew chief was joking. He loves to build & repair stuff, but he knows broken bots don't win.
Worm gearboxes are not as "forgiving" as traditional spur gear drives, but we've...
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Forum: Extra Discussion
Today, 12:01 PM
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Replies: 17
Views: 916
Re: pic: Quick-Change Chassis 2
Worm gear efficiency is largely determined by the ratio. Yes, a high ratio (100:1) worm gear drive might be only 50% efficient, but at 10:1 they are 85-90%. Design World Article...
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Forum: Extra Discussion
Today, 11:18 AM
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Replies: 17
Views: 916
Re: pic: Quick-Change Chassis 2
Good points. Our pit crew chief complained that our 'bot was so reliable he didn't have anything to do between matches except change the battery & check the fasteners for tightness.
One other...
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Forum: Extra Discussion
Today, 09:18 AM
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Replies: 10
Views: 433
Re: pic: Quick-Change Motor Drive Module 1
Yes, Team 342 had a couple Nordex gearbox failures using 12" wheels. This adds tremendous stress to the gearbox housing during pushing & abrupt stops.
Team 3489 has used them for 3 years, with no...
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Forum: Extra Discussion
Today, 08:53 AM
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Replies: 10
Views: 433
Re: pic: Quick-Change Motor Drive Module 1
We inserted a 5/8" OD shaft then drilled & tapped a couple M4 holes into both the gearbox & shaft, using the existing roll pin hole as a pilot. Then installed a couple M4 screws. This seems to hold...
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Forum: Extra Discussion
Today, 08:07 AM
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Replies: 10
Views: 433
Re: pic: Quick-Change Motor Drive Module 1
Hmm.. It looks like a few different vendors are selling the same gearbox: Nordex (https://catalog.nordex.com/cc2742), SPD-SI (https://shop.sdp-si.com/catalog/?cid=p53) and Torque Transmission...
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Forum: Extra Discussion
Today, 07:51 AM
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Replies: 10
Views: 433
Re: pic: Quick-Change Motor Drive Module 1
Yes, you have a good point. We already have a number of these worm gearboxes with a 10:1 gear ratio. If that doesn't fit our strategy in 2017 we'll need to add a chain or belt drive to adjust the...
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Forum: Extra Discussion
Yesterday, 10:02 PM
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Replies: 17
Views: 916
Re: pic: Quick-Change Chassis 2
If we use this concept, it will be for ease of assembly & quick repairs at the competition. Using nutserts and an electric screwdriver I think we could swap out a drive module in <1 minute.
We also...
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Forum: Extra Discussion
Yesterday, 09:51 PM
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Replies: 10
Views: 433
Re: pic: Quick-Change Motor Drive Module 1
It's a Nordex GRX-A2-10 (10:1 speed reduction). Link (https://catalog.nordex.com/pc2743_26612)
We've had very good luck using them to drive 6" wheels, but our sister team (342) stripped one or two...
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Forum: Extra Discussion
Yesterday, 02:51 PM
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Replies: 10
Views: 433
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Forum: Extra Discussion
Yesterday, 12:24 PM
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Replies: 17
Views: 916
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Forum: Robot Showcase
12-14-2016, 10:58 AM
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Replies: 6
Views: 1,208
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Forum: Off-Season Events
10-17-2016, 09:44 AM
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Replies: 20
Views: 2,323
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Forum: Off-Season Events
10-10-2016, 03:37 PM
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Replies: 20
Views: 2,323
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Forum: Rumor Mill
09-27-2016, 04:52 PM
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Replies: 41
Views: 6,780
Re: Possibility of a flying object?
Last year the FTC game "FIRST ResQ" had little plastic figurines that could be triggered to slide down a zipline: Game Animation (https://youtu.be/b49Q3kqrSv0?t=6m43s)
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Forum: Regional Competitions
02-26-2016, 10:43 AM
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Replies: 290
Views: 63,082
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Forum: Regional Competitions
02-26-2016, 10:20 AM
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Replies: 290
Views: 63,082
Re: Palmetto Regional Week 0.5
Does anyone know if there's an alternate video streaming source, other than the one posted on http://www.myrtlebeachfirstrobotics.com?
It's blocked on my computer.
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Forum: General Forum
01-27-2016, 01:37 PM
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Replies: 39
Views: 9,839
Re: Team Standards Design
Excellent Ted Talk. Reminds me of the "Death by Powerpoint" tips for good design. Working in industry I keep seeing people that agree with these concepts in theory, but have some reason why the...
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Forum: Robot Showcase
01-26-2016, 11:04 PM
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Replies: 17
Views: 3,623
Re: Team 599: The Robodox's Robot Teaser
For support have you tried the SolidWorks section of Chief Delphi? Another place great place to get help is at
https://forum.solidworks.com (http://https://forum.solidworks.com)
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Forum: Computer Graphics
01-26-2016, 06:40 AM
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Replies: 13
Views: 3,930
Re: StrongHold Logo
UPDATE: Yesterday FIRST posted "official" high resolution FIRST Stronghold logos, in EPS format:
http://www.firstinspires.org/resource-library/frc/first-stronghold-logo
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Forum: General Forum
01-26-2016, 06:35 AM
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Replies: 12
Views: 3,618
Re: First Stronghold Font
UPDATE: FIRST just Posted "official" high resolution FIRST Stronghold logos, in EPS format:
http://www.firstinspires.org/resource-library/frc/first-stronghold-logo
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Forum: Computer Graphics
01-25-2016, 09:14 PM
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Replies: 13
Views: 3,930
Re: StrongHold Logo
FIRST posts one-color logos for the various robotics programs (FLL, FTC, FRC). These are great for t-shirt silk-screening, if a team can't afford multicolor graphics. I couldn't find a one-color...
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Forum: Computer Graphics
01-25-2016, 06:31 AM
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Replies: 13
Views: 3,930
Re: StrongHold Logo
I saved a high resolution FIRST Stronghold logo here (https://app.box.com/s/n5woo13g1zejgtjwxo2um0pa8ey04wio).
And here (https://app.box.com/s/jnwg64dwl86k1zpk0mglih7jqkow9v5i) is a single-color...
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Forum: General Forum
01-25-2016, 06:25 AM
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Replies: 12
Views: 3,618
Re: First Stronghold Font
I saved a high resolution FIRST Stronghold logo here (https://app.box.com/s/n5woo13g1zejgtjwxo2um0pa8ey04wio).
And here (https://app.box.com/s/jnwg64dwl86k1zpk0mglih7jqkow9v5i) is a single-color...
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I think this is as close as we'll come to getting that water game we've been waiting for. - Jeff Rodriguez [more] 
