LCD Screen

April 8, 2018 by SuperRenegade | Coach's Corner, Programming

There is much code available online for how to program an auton selector LCD menu. This post reviews our favorite code. It's simple to understand and customize, provides 100% unambiguous feedback, and allows you to change your mind or fix an accidental button-push.

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April 5, 2018 by SuperRenegade | Coach's Corner, Mechanical

Superior build quality results in a superior performing robot. It's not just that good building practices result in a better *looking* robot, they result in a longer-lasting, more durable robot. And that translates directly into how your team does in match play. Here are some tips that will move your team toward a better robot.

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April 5, 2018 by SuperRenegade | Coach's Corner, Running Your Team

On April 5, 2018 the Game Design Committee announced major changes to how the playoffs will be structured at VEX Worlds—that will carry over into next year's game.

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March 31, 2018 by SuperRenegade | Coach's Corner, Mechanical

Robots are allowed to use an unlimited amount of 1/8" braided nylon rope. My team has made great use of this material in our last 2 robots, saving weight and opening up our design possibilities.

Bolts

March 6, 2018 by SuperRenegade | Coach's Corner, Mechanical

Nylock or keps nuts: Which is better? Here's a guest post by Renegade Robotics dad David Beaver on the science of nuts & bolts, and what it means for building a durable competition robot.

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February 20, 2018 by SuperRenegade | Coach's Corner, Programming

The Pre-autonomous / Initialize part of your competition template can be used for handy stuff, including sensor calibration and autonomous code selection.

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February 19, 2018 by SuperRenegade | Coach's Corner, Electrical, Programming

The VEX accelerometer component's usefulness in competition seems to be limited to a tilt sensor or an unexpected-stop sensor. Using it for position calculation involves double-integration, which introduces noise.

VEX Light Sensor graphics

February 19, 2018 by SuperRenegade | Coach's Corner, Programming

The VEX light sensor does not see a lot of use in competitive robotics. This analog sensor returns a numerical value that corresponds to the amount of ambient light detected.

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February 16, 2018 by SuperRenegade | Coach's Corner, Electrical

Motor controllers need to be plugged in close to the cortex, and 2-wire extensions should be used to reach motors far away. You can use 3-wire extension cables in place of 2-wire extensions if needed.

Datalog and graph screenshot

February 14, 2018 by SuperRenegade | Coach's Corner, Programming

RobotC's datalog functionality allows you to see your program's numerical data in complete detail, captured as your program is running. You can scroll through every iteration of a function and see the value of variables at each step. Plus one-click download to CSV and one-click customizable graphs. I love it.

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February 12, 2018 by SuperRenegade | Coach's Corner, Electrical

Did you know you're allowed to use 2 batteries on your VEX competition robot? Learn more to improve your robot's performance!

Close-up of zip-tied motor

February 9, 2018 by SuperRenegade | Coach's Corner, Competing, Mechanical

Here's a tip from the experienced teams: remove all the screws from your robot's motors, and instead hold it all together with a large zip tie. This method allows super-fast swapping out of motors and gears, and allows quick access to cool down your motors in between matches.

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February 5, 2018 by SuperRenegade | Coach's Corner, Programming

There is much information on the VEX Forum and various websites concerning PID, and most of them do a better job of explaining how it works and how to implement it than I could hope to achieve. Here's a post with links to the resources I found useful.

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January 27, 2018 by SuperRenegade | Coach's Corner, Mechanical

High-strength gears come with 2 kinds of inserts: metal ones with a square hole in the center, and plastic ones with a round hole. Read on to learn where and why you want to use those green inserts.

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January 27, 2018 by SuperRenegade | Coach's Corner, Programming

RobotC tasks are a powerful tool that allow you to write code that can run simultaneously (sort of faux-multitasking, since the cortex cannot actually do two things at once). This is pretty high on the list of why we switched to RobotC from easyC; if your robot can handle several movement instructions at once, you can do a lot more, for example, in those 15 seconds of autonomous.