W3_Lab

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Defense Acquisition University *

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MET230

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Mechanical Engineering

Date

Dec 6, 2023

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docx

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9

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MET230 Hydraulics and Pneumatics Systems Instructor: Mohsen Latifi Lab 3 Hydraulics and Pneumatics Systems Student Name(s): Charles Haskett Honor Pledge: I pledge to support the Honor System of ECPI. I will refrain from any form of academic dishonesty or deception, such as cheating or plagiarism. I am aware that as a member of the academic community, it is my responsibility to turn in all suspected violators of the honor code. I understand that any failure on my part to support the Honor System will be turned over to a Judicial Review Board for determination. I will report to the Judicial Review Board hearing if summoned. Charles Haskett Date:
Contents Abstract ....................................................................................................................................................... 3 Introduction ................................................................................................................................................. 3 Procedures or Problem Statement ................................................................................................................ 4 Part I: Exercise One Pneumatic System .................................................................................................... 4 Part II: Exercise Two Pneumatic System ................................................................................................... 4 Data Presentation & Analysis ...................................................................................................................... 5 Predictions ............................................................................................................................................... 5 Required Screenshots .............................................................................................................................. 5 Conclusion ................................................................................................................................................... 6 References ................................................................................................................................................... 7 2
Abstract In this course, the student will be instructed on how to use Automation Studio simulation software to create various pneumatic systems. This will teach the student not only how to build a pneumatic schematic using symbols but also how to construct a ladder diagram to oversee the pneumatic circuit. In addition to using symbols already known to the student, new schematic symbols will be introduced for the ladder diagram. The student will be required to observe the pneumatic circuit and predict its outcome. The student will be tasked with building the schematic and ladder diagram and then simulating the circuit to confirm their predictions. I ntroduction Pneumatics is a system that utilizes compressed air to operate machinery automatically. It is commonly used in industrial manufacturing, garages, and dental offices. The compressed air is filtered and dried to protect the components, and lubrication may be added to improve performance. The system generates power through linear or rotary motion using air at a pressure of 60 to 120 PSI. Hydraulics is a similar system that utilizes oil at much higher pressure, ranging from 800 to 5000 PSI. 3
Procedures or Problem Statement Part I: Exercise One Pneumatic System During the exercise, I began by placing the schematic symbols for the pneumatic circuit that I was already familiar with. Once I had all the symbols required for the pneumatic circuit, I proceeded to build it. First, I connected the pressure source to the electronically controlled valve, which I then connected to a variable throttle. I connected the other side of the variable throttle to the end cap of the cylinder. I then connected a line from the rod side of the cylinder back to the electronically controlled valve and then to the exhaust. After completing the pneumatic circuit, I moved on to locating and placing the schematic symbols required to build the ladder diagram to control the pneumatic circuit. The ladder diagram needed the following symbols: a twenty-four-volt power source, a reference power source, a normally closed pushbutton (for stop), a normally open pushbutton (for start), two open connectors, a limit switch, a coil, and a solenoid. The twenty-four-volt power source powered the entire ladder diagram, and the reference power source represented the ground to complete the electrical circuit. The stop pushbutton and the start pushbutton started the first rung with one of the open connectors connected between the stop and start connection and the other side connected between the start and limit switch. The limit switch was connected between the start pushbutton and the coil. The second rung consisted of the second open connector and the solenoid source. Please see Figure 1 for the schematic of the exercise one system. Part II: Exercise Two Pneumatic System During the exercise, I first placed the schematic symbols for the pneumatic circuit that I was already familiar with. Once I had all the symbols required, I proceeded to build the circuit. I connected the pressure source to the double solenoid electronically controlled valve, and then connected the valve to the double action cylinder. Two pressure switches were connected, one between the valve and cylinder, and the other in the line from the valve to the cylinder. The exhaust was then connected to the valve, completing the pneumatic circuit schematic. After completing the pneumatic circuit, I moved on to placing the schematic symbols required for building the ladder diagram. The ladder diagram needed the following symbols: a 24-volt power source, a reference power source, a toggle switch, two proximity switches, and two solenoids. For the schematic of the exercise two system, please refer to Figure 2.
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