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Build a Pneumatic Catapult. Build a Pneumatic Catapult. Performance Objective: Given VEX parts build a pneumatic catapult that can throw a ping pong ball at least 12 inches horizontally Enabling Objectives: identify the parts of used in a pneumatic system

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build a pneumatic catapult1
Build a Pneumatic Catapult
  • Performance Objective: Given VEX parts build a pneumatic catapult that can throw a ping pong ball at least 12 inches horizontally
  • Enabling Objectives:
  • identify the parts of used in a pneumatic system
  • match the parts used in a pneumatic system with its purpose
  • explain various uses for a pneumatic system
pneumatic systems
Pneumatic Systems
  • A pneumatic system consists of several parts
  • A VEX pneumatic system requires:
    • Solenoid valve
    • Reservoir
    • Pressure Regulator
    • Single Acting Spring Return Cylinder
    • Tubing
    • Plug for Reservoir
solenoid valve
Solenoid valve

Cable w/valve

Connects one VEX I/O Port to one Solenoid

The valve can be controlled using a single digital output

Refer back to Lesson 1.4 Operate the Tumbler, to see how to program a single digital output

reservoir
Reservoir

Reservoir

Contains the air used to power the cylinder

pressure regulator
Pressure Regulator

Mini Regulator

Regulates the amount of air pressure that moves the cylinder

single acting spring return cylinder
Single Acting Spring Return Cylinder

This cylinder is the moving part in this system

Air pushes the arm out of the cylinder

A spring inside the cylinder pushes the arm back in when there is no air pushing

tubing
Tubing

Tubing allows the air to travel from the reservoir to the cylinder and other parts of the pneumatic system

slide9
Plug

A plug is used to plug unused ports in the system

the system
The System

All of the parts can go together like the picture

With the system set up this way the pneumatic arms will move out when air is pushed through the cylinder

uses for pneumatics
Uses for Pneumatics
  • Air brakes on buses and trucks
  • Pipe organs:
  • Pneumatic actuator
  • Pneumatic air guns
  • Pneumatic Launchers, a type of spud gun
  • Pneumatic tools:
    • Jackhammer used by road workers
    • Pneumatic nail gun
pneumatics in robotics
Pneumatics in Robotics

Catapult

Lifting mechanism

Arm mechanism

Gripper mechanism

Can you think of anywhere else where you might use a pneumatic system

build a catapult
Build a Catapult

Using the guidelines set forth in Design Brief 4.3, Build a Pneumatic Catapult

Build a catapult that can shoot a ping pong ball at least 12 inches

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