(Note: some motors may have to be reversed, depending on how they re installed) After you ve clicked OK, your code will be updated to look like this: The code generated which you ll later reference in your program it s best to just edit it through the window, though you can edit the text itself if you want to show off. 3Ħ In the configuration described above, the Front Left wheel is plugged into port 2, the Back Left in port 3, etc. However, they can only rotate 100 degrees. Servos will allow the programmer to position a part of the robot without having to spin a motor and use sensors to figure out where the part is. They look like motors, they smell like motors, they might even taste like motors (please don t taste them), but servos are in fact different from motors and have a different purpose. Though these are generally used for autonomous in competition, they can also be used to automate tasks for the driver during the drivercontrol section of competition. These numbers can be programmed so that the robot can react to certain situations without the help of the driver. Sensors provide the programmer with the ability to have the robot see or touch something by returning numbers to the microcontroller. Motors come in 2 distinct flavors: the 269 (shown to the left) and the 393 (provides 60% more power than a 269). They can be programmed to spin forwards and backwards at a particular percentage of their maximum power (and thus a particular rate) by being assigned a number from -127 to 127 (0 is stopped, -127 is reversed at full power and 127 is forwards at full power). Speaker Port: Used to plug in the VEX speaker (see page ) 2Ĥ The Basics Continued: The Stuff You re Plugging In and How It Works 1. Digital Ports: Digital ports are for sensors that collect actual numerical data and then send that data to the microcontroller. Analog Ports: Analog ports are for sensors that simply return a voltage that is interpreted by the microcontroller and turned into a numerical value to be used in programming. Note: VEX decided that motor ports 1 and 10 are special, so motor controllers are not needed for those two ports.
If you re using a two-wire motor, make sure you re using a motor controller.
Motor Ports: Motor ports are, quite simply, where motors are plugged in.
Analog Ports Used with VEX LCD Screen Digital Ports Speaker Port Motor Ports 1. If you can, it s better to label your motors and sensors with a piece of masking tape so you re not trying to follow wires later. 3 The Basics: Plugs and Wires In programming with VEX, it s pretty important to know exactly what you re programming and where it s plugged in on the microcontroller before you start.
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