Expanding STEM skills through robotics

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Our Mission

Our mission is to is grow and expand as people and as a team, while bringing others along with us. We are passionate about being part of creating interest in STEM skills in South Africa, and bringing opportunities and hope to students that don’t have easy access to FTC and robotics opportunities.

image of fattys drivetrain Outreach to Silverlea
Our Team At A Glance
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AWARDS WON

9

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TEAM MEMBERS

9

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YEARS IN FIRST

3

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TEAMS SUPPORTED

2

Outreach

Expanding STEM Skills through Robotics

The cost of professional robotics coaching is high and does not fit within the budget of everyone who is passionate about robotics. So, we have adopted a pay-it-forward coaching method, where we coach others, and subsequently those whom we taught, go on to coach others. If a team member has a skill, they take on the task of teaching that skill to others in the team who have an interest in it.

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Silverlea Primary Robotics Club

We have helped Silverlea Primary start an FLL team by sourcing the R3300 required for them to register a new team. In addititon we have spent many hours training them on thing like gears, solution design, coding, control systems, game strategy and presentation skills. They recently won the “Robot Design Award” in the Western Cape FLL competition.

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Connecting with Industry Experts

We have reached out to various experts in our local STEM community who have been excited to provide our team with training. These have included professionals in Robotics Manufacturing and Engineering, Mechatronics Engineers, Software Engineers, Venture Capital Experts, Agile Methodology Experts.

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Connecting with FIRST community

We have reached out to other more experienced teams in the FIRST community who have inspired us expand our horizons and pointed us in the right direction when we have encountered difficulties. These include a First Robotics Team and top FTC team whose performance we admired.

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Increasing awareness of FIRST

We arranged an outreach event at Pinelands High School to create awareness of FIRST and FTC. They have since started an FTC team which hopes to compete in the next season.

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About Us

Who are we

We are Texpand, a First Tech Challenge (FTC) team founded by a group of friends in Cape Town, South Africa. Relatively new to FTC, our passion for technology has grown 10 fold since we were founded. We now have a spread of experience with 4 members in their 3rd year 2 members in their 2nd year and 3 members in their 1st year. We don’t have technical coaches, so we have learned everything we know from online resources, seeking input and mentoring from industry professionals and from other teams in the FIRST community. Having also learned a lot from competing at worlds this year, we hope to pass on what we have learned on to other teams in South Africa

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History

Texpand is a First Tech Challenge team which was created in 2020. Our team has been on a steep learning curve, as many of us did not have much experience in robotics, coding and STEM skills when we started. But by working together, sharing knowledge and skills, and a fair deal of problem-solving our team managed to win the SA Nationals Innovation Award and Winning Alliance Award in both the 2020-2021 season and 2021-2022 season. Then in the 2022-2023 season we won SA regionals inspire award and were the Winning Alliance Captain, Then at SA nationals we again won the inspire award and were Winning Alliance Captain which meant we qualafied for Worlds in Texas, Houston. At worlds we won the 1st place think award in the and were placed 22nd in the Jemison divison.

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Achievements and Awards

2021 - Ultimate Goal

SA Nationals Rockwell Innovate Award

SA Nationals Winning Alliance Award - SA Nationals - 89 points - Solo Game

Unfortunately we never recived the trophies in this year

2022 - Freight Frenzy

SA Nationals Ratheon Technologies Innovate Award

SA Nationals Winning Alliance Award - 108 points - Solo Game

Awards from Freight Frenzy

2023 - PowerPlay - South Africa

SA regionals Inspire award - SA regionals winning aliance captain

SA Nationals Inspire award - SA Nationals winning aliance captain

Awards from PowerPlay

2023 - PowerPlay - Worlds Championship

- Jemison divison 1st place Think award -

- Placed 22nd in Jemison -

Awards from Worlds

Past Robots

Our 2022-2023 PowerPlay, award winning robot, was called "Buff". The descriptions of “Buff's” subsystems are below. Also see our robot reveal for "Buff" on the left

Drivetrain

Our drivetrain was a modified gobuilda strafer chassis, we got shorter U channel to make the drivetrain narrower for better maneuverability on the field

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Grippers

For our grippers or way of grabing the cone we used 3D printed arms with gear teeth on the end so that we could use only one servo for each gripper. We have two grippers on the robot on for collection and on for delivery

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Delivery slides

Our delivery slides were four stage viper slides, we got viper slides when our draw slides were being way to unreliable. The down side of four stage viper slides is they are very heavy, so in hind sight we should have only used two stage

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Collection slides

For our horizontal collection slides we have modified 50cm draw slides so that we got maximum extension while still fitting in the size constraints. The destacker and base gripper were mounted on top of these slides to extend with the slides to collect the cones.

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Destacker

Our "Destacker" is a virtual four bar using custom 3D printed sprockets and brackets for attaching to the draw slides. This subsystem took the most time and iterations to get reliable and doing exactly what we needed it to do. Our "nest" for cone transfer is also mounted inside the destacker

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Design

We CAD designed some side panels for the robot to inprove Buff's "Swag" factor, HG molenaar kindly lazer cut them out of stainless steel for a very cool end product

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Our 2021-2022 Freight Frenzy, award winning robot, was called "Skinny". The descriptions of “Skinny’s” subsystems are below:

Drivetrain

Our drivetrain used mecanum wheels, mounted in-between two lengths of C-channel, powered by two different types of Rev motors and connected and braced with extrusion.

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Collection

Our collection system, powered by a core hex Rev motor and a chain, consisted of shafts with rubber tubing to grab the freight and bring it into the robot and up a perspex ramp.

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Linear Slide

The linear slide was made using kitchen drawer slides. We threaded bearings and pulleys with jewellery wire wound onto a custom 3D printed spool with a motor programmed to pull it up to the set heights we required.

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Carousel

We used a rubber wheel, powered by a core hex motor with a 2-1 gear ratio, to turn the carousel and deliver ducks. A suspension mechanism ensured that our wheel kept contact with the edge of the carousel, adding some tolerance into the system to reduce the dependence on accurate driving.

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Servo Box

The servo box was positioned on the linear slide to receive the freight from our collection system. Once the linear slide reached the desired height, the box could be tipped using a servo motor to drop the freight off on the chosen level of the shipping hub.

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Design

We used some cardboard and green spray paint to make our robot look more stylish and we called the design “Lambogreeny”.

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Our 2020-2021 Ultimate goal, award winning robot, was affectionately called "Fatty". The descriptions of “Fatty’s” subsystems are below:

Drivetrain

Our drivetrain used mecanum wheels, mounted in-between two lengths of C-channel, powered by three different types of Rev motors and connected and braced with extrusion.

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Collection

Our collection system consisted of two sets of rollers: one to lift the rings off the ground; and one to grab the rings and bring them into the robot. The sets of rollers were powered by a single core hex Rev motor using a chain of gears.

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Conveyor belt

We built a unique conveyer belt system to lift the rings up into our hopper. We mounted custom 3D printed spools onto top and bottom shafts. We ran rubber bands around the spools, with custom 3D printed hooks attached to them. The hook would grab the ring and flip it over into the hopper when it reached the top of the conveyer belt. The conveyer belt was powered by the same motor as the collection system, using a chain of gears.

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Shooter

Our shooter was of simple construction, designed to take up as little space as possible. It had a custom 3D printed hopper that could stack 3 rings at a time. We spun a rubber flywheel up to a predetermined speed. Then an arm on a servo motor was activated to force the lowest ring past the flywheel, propelling it in an accurate and consistent trajectory towards the upper goal.

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Wobble goal arm

The wobble goal arm was an arm on a pivot in the vertical axis, powered by a geared Rev core hex motor. The griper used two extension of extrusion, each powered by a servo. This acted as a simple clamp to grab the wobble goal.

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Design

We enclosed our robot in black cardboard to display our team number and logo.

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