Building

Drive Bases



Kiwi Drive

The kiwi drive looks like a triangle and has three omni wheels on the three points, and can move in any direction. Kiwi has the functionality of the X-drive with 3 motors, so there is less motors being used, but it is pretty difficult to program.


Holographic Drive (H-Drive)

The H-Drive, unlike other drive bases that have only two degrees of freedom (for example the tank drive), has four. The H-drive can also move in any direction without changing the direction of its wheels.



X-Drive or Holonomic Drive

This drive is taken from the original H drive base except it has omni wheels on each corner at a 45 degree angle to allow for easier movement and is faster but has less torque. Also, it takes the same amount of effort to program the X-drive as it does the H-drive.

Square/Rectangular Base

This drive base is simple and is recommended for first time builders, its code is similar to that of the ordinary tank drive, however much like the x drive this drive base has the ability to straffe.



Tank Drive

The tank drive is another staple for a standard drive. It can only move in two directions unlike the H-drive which can move in any, but, the tank drive can simply turn before moving. Also, the tank drive is simple to code, troubleshoot and is proven to be effective on the field.

General Knowledge


Screws

When building your robot these are a necessary component. These screws come in many different sizes and they can be used for different tasks such as holding and connecting standoffs, connecting c-channel, and holding in motors.



Aluminum/Steel C-Channels, Angles, Rails and Plates

The C-channels and other Aluminum/Steel bars we use have holes with 0.500" increments. These bars come in many different sizes and is used to make your robot's body and attachments (Shooter, Lift). When building with these make sure any sharp edges made while using them are filed to a null point to avoid injury when building and on the field.

Standoffs

Standoffs are made of a lightweight aluminum. They have a wide selection of sizes for any type of job you need it to do. Standoff are commonly used to space subsystem of the robots off from each other. You can connect standoffs using couplers.



Vex Cortex and Setup

When connecting and powering your robot you need the Vex Cortex, Joystick, VEXnet key, backup battery, and a 7.2 volt battery to run in (not in picture). When building your robot you attach your Cortex onto the robot and plug all motor and other cables into it, then plug a Vex key into it with your code on it, then get your other Vex key and plug it into the Joystick with the code. Also, during a match you must always have your backup battery plugged incase your other battery dies in the middle of the game.

Motors and gears

In robotics, motors are essential to making your robots work, they can power shooters and make your drive base work. Also, within the motor, you can change its inner gears to change how well it works. Low speed gears have high torque application but low speed. High speed gears have more speed but has medium torque application. Lastly, turbo has little torque application but is way faster than high and low speeds.


Want to know more about programming?

Programming