High Stakes

Intake P2

Agenda

- Intake Curriculum

- Additional Concepts

- Construction

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Intake Part 2

Hooks push the ring out ⇒ can’t intake a ring properly

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How can we make the ring actually get hooked on?

Intake - Problem

First stage ⇒ Flaps

Flaps are able to pull rings in efficiently.

What are some benefits of flexible flaps to intake?

Intake - Concept

Intake - Structure

Question

How does the placement of the first stage affect the intake?

Additional Concepts (Part of Intake)

What is cantilevering?

Cantilevered

Not cantilevered

• Supported on one side

• Supported on both sides

Cantilevering in real life

Cantilevering in VEX

Cantilevered

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Not Cantilevered

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Do You Spot a Difference?

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Why is this important

• Know when to cantilever

Cantilevering creates:

• a compact design

BUT

• a weaker design

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2 c-channels

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1 c-channel

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Not-Cantilevered

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Cantilevered

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Why is this important

Weak joint → Broken Gears!!

Cantilevering on boost

What are some examples of cantilevering on this robot?

Cantilevering on boost

Cantilevered Sprockets

Cantilevered

C-Channel

Question

Why do you think we cantilevered the joints on intake?

Side View

Back View

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What is a screw joint

A screw joint

• utilizes screws to allow components to rotate along the rounded edge
• Cannot be used with active motors

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Screw Joint between 2 C-Channels

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Example Screw joints

On a drivetrain

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2 c-channels

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Question

What is the difference between using a screw joint and axle?

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Screw Joints & Axles

• Axle rotates with the gear
• Screw stays stationary

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Question

Why do you think screw joints are important?

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Why are screw joints important?

Pros to Screw Joints

• can hold more load
• more compact
• can be cantilevered
• has less friction

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Screws joints and axles can usually be used in the same cases, however it is up to you to decide which is optimal.

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Application to Drive Train

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• On drivetrain, we use screw joints for the idler gears which decreases the friction overall.

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How do you support a joint properly?

• Using parts like C channels, L channels, polycarb, etc. to support structures that joints are mounted to
• reduces friction by keeping mounts straight

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Triangle Braces

Question

How do you think friction affects the efficiency of a mechanism?

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How does friction affect the joint in an assembly?

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• makes assemblies less efficient
• require more wattage for less work

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How to avoid high friction:

• have the correct amount of spacing on your joints
• don’t use bent metal
• triangle braces

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Construction

Make sure to cut these

(Come to the cutting station with the parts you need to cut)

Intake 2 Construction

Parts

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Video Error

Motor was installed (in last weeks video) at the wrong place. The correct mount is shown at 11:23.

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Wrong (grey)

Correct (green)

Intake 2 Construction

Video

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Intake 2 Construction

Video highlight:

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Tighten the collar hidden in front of the motor

*tighten shaft collars

Summary

Today we went over the front stage of the intake as well as the parts needed to build it. Now you will have time to work on this part!

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Q/A

Curriculum

You can access this slideshow and more curriculum at:

https://boostrobotics.org/curriculum