Friday, February 21, 2020

2020: Day 45 (plus a few of the previous days)

Comp Robot is beginning to come together. 

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Intake

Now with more polycarbonate
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Shooter Hood

Printed and laser cut hood.
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Camera Mounts are progressing

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Buddy Climb Mechanism

The deployment mechanism is progressing.


More photos and videos can be found in our gallery.

Spectrum

2020 Day 48: CAD updated

The CAD model has been updated on GrabCAD - https://grabcad.com/library/spectrum-3847-2020-ultraviolet-frc-robot-1

Some of the electrical and pneumatics details are getting done
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Climber Gearbox test fit is done, should be climbing by Saturday (with acetal plates, not wood)
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Spectrum

Tuesday, February 18, 2020

2020 Day 46: Design Review #7

No Bag Day

It's a very good day, it's the first of hopefully many no bag days in future seasons.

For anyone new to FRC and wants to know a few of the reasons why so many in the community supported removing the bag for many years here are a couple good places to read more.

https://www.chiefdelphi.com/t/paper-stop-the-stop-build/153141

https://www.chiefdelphi.com/t/first-email-stop-build-day-survey/153131/76

Everyone at FRC HQ and in the community that worked to make the removal of the bag a reality deserves a thank you. Giving teams the ability to choose how to use their resources (time, money, etc) is a great thing and will increase opportunities for inspiration through iteration and more time with their robots.

Design Review #7

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Spectrum

Wednesday, February 12, 2020

2020 Day 37, 38, 39 - Design Review 6

Design Review # 6

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Falcon 500 Tight Pinions

Here is a video showing how we use the wire brush to make the tight press pinions slip on to the Falcon 500 shaft. We also have figured out that some of the pinions go on the shafts easier in one direction than the other, so if it's not fitting nicely after a minutes or two with the wire brush flip it around and see. The wire brush has made it so we don't have to press any of the pinions on they all just slip on after enough time with the brush on the shafts.



Spectrum

Sunday, February 9, 2020

2020 Day 35 & 36

Intake

We are getting some 2.5" OD polycarbonate tube to test soon. But for now.
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Shooter

The shooter is still under development. We are trying to improve our spin-up time.

The CAD currently looks like this. (only 2-4 of them will be staying there)

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Here is a small slow-motion video. We are working on improving belt distances on the protobot.

Spectrum

Thursday, February 6, 2020

2020 Day 34

Really quick update today. We are moving along on revisions to CAD for the protobot so we can them fixed in time for competition robot production starting in earnest this weekend.

We are moving to use a 3D printed pulley on our falcon shooters using a 10t falcon pinon gear as a mating spline. A few other teams have shown off this method and it should work nicely for our situation.

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Posted the file for this model here - https://grabcad.com/library/36t-3mm-pulley-10t-20dp-vex-gear-bore-1

Spectrum

2020 Day 33: Losing Weight

We have been finding places we can remove weight from our robot. We need the weight to fit our climber on and possibly add more motors to our shooter.


  • Weight savings
    • Change Flex Wheels to pool noodles - ~1lb
    • Remove roller (3 to 2) - ~1lb
    • Remove VPs in Funnel and remove one NEO 550, move to belt and crossed poly cord belt
    • Look into nylon bushing instead of bearings on some of the rollers/belts.
    • Remove VP from the tower and switch to Falcon with 8t pinion (can't get 8t on NEO, don't want to press on 9t, need too much reduction for NEO550)
    • Fairlanes in accelerator wheels move to stealth wheels
    • Remove VP from buddy climb and use 6t NEO 550 pinion
    • 1/16" wall square/rectangle tube change to 0.04" and 0.05" vex Versaframe.

Here is a video of a very quick drill powered pool noodle intake test.


Spectrum