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  #46   Spotlight this post!  
Unread 09-13-2017, 06:33 PM
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

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Originally Posted by Lil' Lavery View Post
Was the initial effort of empirically determining C-C distance for individual chain runs worth it compared to adding some sort of adjustable tensioning device?
It was 20 minutes of CAM/CNC time and saved us making 3 days worth of parts, so 100% worth it.
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Unread 09-14-2017, 07:54 AM
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

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Originally Posted by Ashwin254Adulla View Post
Team 254 is proud to present the Technical Binder and the Build Blogs for our 2017 robot: Misfire. If you have any questions, feel free to ask!
In your fuel intake design, I see two pistons on each side. I don't exactly understand their use and placement. Can you explain?
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Unread 09-14-2017, 09:17 AM
ThemisH ThemisH is offline
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

Quote:
Originally Posted by Shashwath__ View Post
In your fuel intake design, I see two pistons on each side. I don't exactly understand their use and placement. Can you explain?
The purpose of the two pneumatic cylinders is to deploy the fuel intake at the start of each match. Their placement is such that when the intake is stowed within the frame perimeter, they push it and it swings down over the bumper. In our initial design, these cylinders also expanded our hopper when the intake swung down. However, this proved to be somewhat inconsistent, and we have since changed the hopper deployment to be triggered by two independent cylinders that push the hopper walls outwards on each side.
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Unread 09-14-2017, 11:36 AM
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

Will there be a CAD release for those of us who are more visual learners than auditory learners?
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Unread 09-14-2017, 06:10 PM
Ashwin254Adulla Ashwin254Adulla is offline
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

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Originally Posted by TheModMaster8 View Post
Will there be a CAD release for those of us who are more visual learners than auditory learners?
We do not release our CAD. However if you do have any questions, we will be happy to answer them.
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Unread 09-15-2017, 09:46 AM
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

Have you, or will you post the autonomous path planning web app and implementation?
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Unread 09-15-2017, 11:40 AM
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

How do you mount the pulleys onto 775pros? It doesn't look like you use WCP's 775 pulleys, and we have had difficulty finding different pulleys easily mounted to the 775.
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Unread 09-15-2017, 11:45 AM
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

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Originally Posted by Rafi Ahmed View Post
How do you mount the pulleys onto 775pros? It doesn't look like you use WCP's 775 pulleys, and we have had difficulty finding different pulleys easily mounted to the 775.
Try SDP-SI
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Unread 09-15-2017, 11:51 AM
Drewit Drewit is offline
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

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Originally Posted by Xanawatt View Post
Have you, or will you post the autonomous path planning web app and implementation?
I'm not a member of Team 254, but I believe the web app you are looking for is in the "cheesy_path" folder of their 2017 code located here.
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Unread 09-15-2017, 12:30 PM
Ashwin254Adulla Ashwin254Adulla is offline
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

Quote:
Originally Posted by Rafi Ahmed View Post
How do you mount the pulleys onto 775pros? It doesn't look like you use WCP's 775 pulleys, and we have had difficulty finding different pulleys easily mounted to the 775.
We use the GT2 3mm 12 Tooth 775 Pro Pinions which we press onto the motor shaft. We leave around a 1/8" clearance between the pinion and the motor
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Unread 09-19-2017, 09:29 AM
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

Quote:
Originally Posted by Ashwin254Adulla View Post
We do not release our CAD. However if you do have any questions, we will be happy to answer them.
Just out of curiosity, is there a particular reason as to why?
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2014: (FRC Team 2783) Fabrication Student Lead / HumanPlayer / FLL Ref
2015: (FRC Team 2783) Fab Student, Teacher / HumanPlayer / Backup Driver / FLL Ref / FLL Mentor of 6 Teams
2016: (FRC Team 5492) Fabrication Student Lead / Driver / FLL Mentor of Crestwood Elementary
Past Alliance:(2783, 1208, 4154)(2783, 1002, 4265)(2783, 1182, 3868)(2783, 451, 4028)(2783, 1208!, 1288)(5492, 63, 1014)


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Unread 09-22-2017, 12:05 PM
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

What pinion pulleys did you guys use for your 775s on your shooter? They do not look like the ones from west coast products.

I really like how you guys used polycarb with slots that was bent into a curve for your shooter.

In addition the one way bearing is genius, and one of those things that I thought to myself "why did I not think of that".

Paulius Pace
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Unread 09-22-2017, 01:16 PM
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

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What pinion pulleys did you guys use for your 775s on your shooter? They do not look like the ones from west coast products.
2 posts up.
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Unread 09-22-2017, 10:19 PM
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

You guys stated that you went with a shifting gearbox for a low gear to push people, but then only went with 2 cims instead of 3. Why would you make that a focus but then not make it work even better with 3 cims?
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Unread 09-22-2017, 10:23 PM
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Re: Team 254 Presents: 2017 Misfire Technical Binder and Build Blogs

Quote:
Originally Posted by Brian M View Post
You guys stated that you went with a shifting gearbox for a low gear to push people, but then only went with 2 cims instead of 3. Why would you make that a focus but then not make it work even better with 3 cims?
Adding CIM's doesn't give you more pushing power, it allows you to increase your speed in low gear and maintain the same pushing power. Your pushing power is a function of weight and coefficient of friction. As long as you can spin your wheels in low gear (everyone should be designing for this), it's totally independent of speed.
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