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#31
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
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So all in all, not surprising your tube wanted to expand more than Spectrum's. Are you guys going for a longer shot to need that much more surface speed? *Yes centrifugal. Pedants are welcome to spend 15 minutes drawing a FBD with a tangential velocity, required change in velocity to create a circular path, implied acceleration, unbalanced force to create that acceleration, etc, etc. I'm going to pretend it's a real force and get on with my life. Last edited by Kevin Sevcik : 01-02-2017 at 16:19. |
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#32
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
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#33
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
Nice job 3847! What are the servo motors on the front/back of the shooter for?
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#34
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
Thanks! We'll only be using one of the two sets of three, but they're intended to be lane blockers. If we line up to the boiler and one of our side streams isn't on target, we want to be able to disable that stream instead of realigning our entire robot. We have one in the middle so that we can theoretically make a shot while our side is lined up with either the driver station or the front wall of the field.
Last edited by fresh_prince : 01-02-2017 at 17:25. |
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#35
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
This is so amazing!
My team and I just had a few questions: What is your shooter compression and how did you settle upon this number? What is your intake height and how did you find this number? |
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#36
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
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We wanted to design to the smallest amount of compression we could get to work and increase if needed. That way we start with the least load on the motors and add load as needed. |
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#37
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
Great design! Ironically, just looking at your rather complex robot, I was inspired of a way to make our gear pickup MUCH simpler (replace two motors with one belt). Thanks!
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#38
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
Beautiful looking robot... and the CAD is nicely done.
I am looking forward to seeing how this plays on the field. Well done!! |
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#39
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
I'm equally worried about teams building drive base/bumper assemblies to the maximum allowed dimension, and then regretting this decision when they realize all the cool things they could have achieved with a smaller base that enabled over-the-bumper dropdowns. In past years, iterating in new systems was just a matter of finding the space and weight, this year there are going to be a lot of teams boxed out of improving their robots and adding features like Spectrum has because they assumed bigger=better early in the process.
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#40
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
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3847's robot is a good example of leaving a conservative amount of space (just an inch or three) for OTB stuff, but I bet others left way more than they should have. |
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#41
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
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#42
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
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I really like the design of this robot. I wish we'd have considered a gear pickup on the same side as the fuel intake because I think fuel on the floor will make it difficult to reach gears in some cases. |
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#43
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
I mean, if you grow your hopper out over the top of your intake, sure. But if you grow your hopper out in that direction, isn't that just going to stick out the same distance as your over-the-bumper intake? Which then isn't sticking out farther than your robot's frame anymore? Isn't that kind of defeating the purpose then?
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#44
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
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#45
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Re: pic: Spectrum 3847 - 2017 CAD Model: Gamma Ray
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