1 of 13

Introduction to�VEX^® Robotics Platform (VEX V5)

PLTW Engineering

Computer Integrated Manufacturing�Activity 1.2.2 Inputs and Outputs (VEX V5)

1

2 of 13

VEX V5 Testbed for Learning Programming

2

3 of 13

VEX Structure Subsystem

VEX Structure Subsystem forms a robot base

Contains square holes on a standardized ½-inch grid

Allows VEX components to be assembled in various configurations

3

4 of 13

VEX Structure Subsystem

Metal components are directly attached using �8-32 screws and nuts

Nylock nut has a plastic insert to prevent unscrewing

KEPS nut has a ring of “teeth” on one side to grip the piece being installed

Regular nut has no locking feature

Nylock

Nut

KEPS

Nut

Regular

Nut

8-32 screws

4

5 of 13

VEX Motion Subsystem

Components that make a robot move

Gears

Wheels

Motor

Servo

Motor

Servo

Gears

Wheels

5

6 of 13

VEX Motion Subsystem

VEX V5 Smart Motor

Connects to any Smart Port 1–21

6

7 of 13

VEX Motion Subsystem

VEX Servo

Similar appearance to a motor

Significantly different operation

Motor spins continuously at a power value

Servo rotates to a position between 0 to 100 degrees

7

8 of 13

VEX Sensors Subsystem

Provides inputs that sense the environment

Analog or Digital Sensors (depending on use):

Optical Distance

Analog Sensor:

Potentiometer

Digital Sensors:

Bumper �Switch

Limit �Switch

8

9 of 13

Potentiometer

How It Works

Analog sensor

Measures rotation of a shaft �between 0 and ~265 degrees

Returns a value range with maximum of 4095

Caution

Internal mechanical stops prevent potentiometer from turning a full revolution

Excess torque against internal mechanical stops cause them to wear away

9

10 of 13

V5 Distance Sensor

Uses a pulse of laser light to �measure distance from front �of sensor to an object

Can detect an object and determine relative size. Approximate size of an object is reported as small, medium, or large.

Can calculate a robot’s approach speed. Approach speed measures the speed of the robot/sensor as it moves toward the object.

V5 Distance Sensor’s measurement range is 20 millimeters to 2,000 millimeters.

10

11 of 13

VEX V5 Brain

21 Smart Ports

8 3-Wire Ports

Stores 8 Programs

Smart

Ports

3-Wire

Ports

11

12 of 13

VEX V5 Brain – Smart Ports

Auto recognition of any V5 sensor

Auto recognition of any V5 motor

Smart

Ports

12

13 of 13

VEX V5 Brain – 3-Wire Ports

Four settings for each port

Analog Input: Brain displays the analog value

Digital Input: Brain displays the digital value

Digital Out High: Brain generates a “high” (1) signal to send to the device

Digital Out Low: Brain generates a “low” (0) signal to send to the device

3-Wire

Ports

13