The document outlines experiments conducted with pneumatic circuits. Students were asked to accurately construct pneumatic circuits and briefly report on their experiments in groups. Key experiments included circuits using directional control valves actuated by push buttons to extend and retract pistons. Students compared their experimental circuits to actual circuits and found differences in the types of directional control valves used. In conclusion, students learned how to systematically arrange pneumatic components and report on experiments, and it was recommended to replace damaged components to ensure students have enough to build circuits.

1. 1.0 Title : Cylinder Circuit with Pneumatic Control
2.0 Objective
At the end of the lab session students should be able :
i. To construct accurately the pneumatic circuit
ii. To report briefly the pneumatic experiments in group.
3.0 Theory
4.0 Safety Precaution
First of all, it is important to mention some safety rules such as :
i. Do not start the experiment without the technician or lecturer.
ii. Do not using damage equipments.
iii. Make sure the pneumatic hose is plug incorrect position and should be deep
enough.
iv. Setting on air supply to medium pressure ( 3 – 10 bars ).
v. Store all the component at their exact place after complete all the experiment.
vi. Do not unplug the pneumatic hose during operation and etc.
5.0 Procedure
Based on the situation :
i. The pneumatic components was identified.
ii. The pneumatic circuit have been constructed.
iii. The actual circuit have been developed on the pneumatic workbench.
iv. All connection have been checked.
v. The circuit have been ruined through.

2. 6.0 Result
i. Experiment 6 :
Figure 1: Before applied push button
Figure 2: After applied push button
After applied the push button, the piston will extend as you can see at figure 2. This circuit use
two directional control valve (DCV) 2/2 way with spring. First DCV with pneumatic control and
second DCV with push button.

3. ii. Experiment 7 :
Figure 3: Before applied the push button.
Figure 4: After applied the push button.
When one of the push button is pressed, nothing happens to the piston. Should pressed the
both of push button to make the piston extend.

4. iii. Experiment 8 :
Figure 5: Before applied the push button.
Figure 6: Press the first push button
Firstly, supplied air to the two of directional control valve with push button. Then,
pressed the push button for the first DCV 2/2 way with spring, the air flow to the
pneumatic control and will cause the piston extend. Next, when the push button
released, the piston retract.
Figure 7: Press the second push button.
The same operation uses at second directional control valve with push button that cause
the piston extend and retract.

5. iv. Experiment 9 :
Figure 8: Before applied push button
Figure 9: :Press the first push button
Figure 10: Press the second push button

6. 7.0 Discussion
Experiment drawing circuit.
Actual circuit.
We compared the experiment circuit with actual circuit. We found that type of DCV not same.
experiment circuit use DCV 5/2 way with spring, but in actual circuit we use DCV 4/2 way with
spring. It can operate in complete circuit because the function of both DCV are same.

7. 8.0 Conclusion and Recommendation
Our conclusion is we can know how to construct accurately and can arrange the
component of pneumatic circuit systematically. Then we can know how to report and
explain briefly the operation of pneumatic experiment in group. Next we can learn to find
out the correct component and equipment. For our recommendation ,there are
components that have been damaged mixed with the component that can work.
Components should be separated so that students do not use these components to build
the circuit. Components need to be replaced with new components so that students can
use enough components to build the circuit mainly used by many groups.
9.0 Reference
Sources: Websites
http://www.clippard.com/downloads/general/PDF_Documents/Intro_to_Pneumatics.pdf
(4 October 2012 22:07 pm)
http://www.digitalcircuitry.com/DOC/ELECTRONICS/Manuals/Pneumatics/Course%20Books/Tex
t-Pneumatics%20Basic.pdf
(4 October 2012 01:15 pm)