MET322_PA1.4_Richardson_Brendon

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Mechanical Engineering

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Jan 9, 2024

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MET 322 1.4 Practice Assignment CNC Controls and Tooling for Hole and Milling Brendon E Richardson Date: 12/16/2023 The Honor Pledge States: “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.”
MET 322 1.4. What is a computer numerical control (CNC) machine? A CNC machine is a Numerical Control (NC) machine with an added feature of an onboard computer. 2.1. Identify the two types of control systems used to output tool movement. What is the difference between them? The two control systems are Point to Point and the Continuous Path. The difference is that the Point-to-Point system does not maintain contact between the tool and work while the tool is moving to the new cut location and Continuous path maintains contact between the work and the tool as it moves along the cutting path. 2.9. Spindle movement is primarily along the Z-axis. 2.10. Table movements for most milling machines are along the X-axis and y-axis. 2.11. What two types of programming modes can be used to specify tool position? How do they differ? The two modes of movement are incremental positioning and absolute positioning mode. They differ because incremental positioning mode each new position is measure relative to the previous position programmed and absolute positioning measure from a fixed home or origin. 2.12. What is the difference between delta dimensioning and datum dimensioning? Delta dimensioning each new x and y location is measured relative to the last x and y location. In datum dimensioning each x and y location is measured from a fixed set of horizontal and vertical baselines or datums. 2.13. Write the absolute X and Y coordinates of the points shown in Figure 2.22. Point X Y 1 1 -2 2 -2 -6 3 3 -4 4 4 5 5 2 2 6 -2 1 7 5 6 8 -4 -3 The Honor Pledge States: “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.”
MET 322 2.14. Write the incremental X and Y coordinates of the points in Figure 2.22. Use the following order: origin to PT1, from PT1 to PT2, from PT2 to PT3 . . . finish with PT8. Point X Y 1 1 -2 2 -3 -4 3 5 2 4 1 9 5 -2 -3 6 -4 -1 7 -3 5 8 1 -9 2.15. Mark the position of the points listed in the table in each case. See Figure 2.23. a. Treat the points as absolute X, Y coordinates with each new location taken from (0, 0). Point X Y 1 1 -2 2 -2 -6 3 3 -4 4 4 5 5 2 2 6 -2 -1 7 -5 6 8 -4 -3 b. Treat the points as incremental X, Y coordinates with each new location taken relative to the last point marked. Refer to Figure 2.24. The Honor Pledge States: “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.”
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MET 322 The Honor Pledge States: “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.”
MET 322 2.16. In each case write the X and Y coordinates of the center of each hole for the hole pattern dimensioning given. a. Absolute X and Y coordinates. Refer to Figure 2.25 HOLE X Y A 1 .75 B 1 1.5 C 1 2.25 D 2 2.25 E 2 1.5 F 2 .75 G 3 .75 H 3 1.5 I 3 2.25 b. Incremental X and Y coordinates. Refer to Figure 2.26 HOLE X Y A 1 .75 B 0 .75 C 0 .75 D 1 0 E 0 .75 F 0 .75 G 1 0 H 0 .75 I 0 .75 The Honor Pledge States: “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.”
MET 322 2.17. Assume a CNC machine capable of both incremental and absolute positioning is to be used to produce the hole patterns shown in Figure 2.27 a. Write the absolute coordinate to drill hole #1. Write the incremental coordinate to then drill holes A, B, C, and D. HOLE X Y A .437 .437 B -.874 0 C 0 -.874 D .874 0 b. Write the absolute coordinate to drill hole #2. Write the incremental coordinates to then drill holes E, F, G, and H. HOLE X Y E 0.5 0.5 F -1 0 G 0 -1 H 1 0 The Honor Pledge States: “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.”
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MET 322 The Honor Pledge States: “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.”
MET 322 a. Write the absolute coordinates for holes #2, #3, and #4. HOLE X Y #2 1.375 1.06 2 #3 2.5 1.75 #4 3 0.43 7 b. Write the incremental coordinates for holes #1, #3, and #4. Start at the lower left-hand corner of the part and move to the holes in the order described. HOLE X Y #1 0.5 0.562 #3 2 1.188 #4 0.5 -1.313 c. Assume the spindle is positioned at hole #3. Write the incremental coordinates required to move from there to holes #2, #1, and #4 in that order. Write the absolute coordinate to accomplish the same task. Incremental X and Y coordinates HOLE X Y #2 -1.125 -0.688 #1 -0.875 -0.5 #4 2.5 -0.125 Absolute X and Y coordinates HOLE X Y #2 -1.125 -0.688 #1 -2.0 -1.188 #4 0.5 -1.313 The Honor Pledge States: “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.”
MET 322 A .625 in. diameter end mill is being used to mill the part periphery. Write the absolute coordinate of the center of the cutter at positions A, B, C, and D. Write the incremental coordinate of the center of the cutter at positions A, B, C, and D. INCREMENTAL CUTTER CENTER X Y A -.3125 -.3125 B -.3125 2.5625 C 4.3125 2.5625 D 4.3125 -.3125 ABSOLUTRE CUTTER CENTER X Y A -.3125 -.3125 B 0 2.875 C 4.625 0 D 0 -2.875 3.6. The two most important parameters for controlling tool wear and tool cutting performance for a particular material are cutting SPEED and cutting FEED. The Honor Pledge States: “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.”
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