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Pneumatics

In essence, pneumatics uses pressurized air to create force for mechanical work.

Compressor​

It compresses the air to create more pressure. The compressor we use goes up to 120 PSI (pounds per square inch) and then the relief valve will automatically open if 120 is exceeded. The compressor generates a lot of heat and vibration. Note: Make sure the compressor doesn't touch other components nor do you touch it. It is often very hot and creates a lot of vibration.

Pressure Switch​

The pressure switch, connected to the PCM, helps control the compressor. These switches are closed until the robot exceeds 115 PSI and then reopens at 95 psi. The pressure switch stops the compressor if it exceeds a certain psi.

Air Tank​

The air tank contains the compressed air generated by the compressor. It can only withstand 125 psi. It is also plastic-- not made for pressure or ruptures. You need to protect and mount the air tank as well.

Pressure Relief Valve​

The pressure relief valve is a safety measure to ensure that the psi is under 120. This is connected to the compressor

Regulator​

A regulator is another relieving device that limits the working psi to 60.

Solenoid​

  • Solenoids are used to direct the flow of air to hardware in the circuit. There are ports on the PCM dedicated to the solenoids-- both double and single.
    • The difference between a single and double solenoid is best explained in this post by Peter_Johnson (just scroll down, you'll see his response)

Gauge​

The gauge measures the psi of the air running through the system. There should be two gauges, one displaying the working pressure and another one displaying the compressed air. The working pressure should not exceed 60 PSI for safety purposes.

Piston​

Is the part that will actually be doing the work/movement.

Tubing​

Tubing must be done carefully to prevent air leakages. When cutting tubing, make sure it is a clean straight cut to prevent leakage. Additionally, all parker fittings should be sealed with teflon tape on the threads to prevent air leakage.

Resources​

  • Pnuematics is quite complicated, so you will have to do your own research. We strongly recommend you check out the resources provided here.
  • FRC's official Pnuematic's Manual
  • This document by 358 shows the physical part of assembling it, and the lessons that they have learned - Pnuematics Step-by-Step
  • If you are a bit confused on how each part connects to each other, and need a video, Unibots Assembling the Pnuematics System is quite useful