Download JNTUA M.Tech 2nd Sem Reg-Supply 2018 Aug-Sept 9D04204 CNC Technology And Programming Question Paper

Download JNTUA (JNTU Anantapur) M.Tech ( Master of Technology) 2nd Semester Reg-Supply 2018 Aug-Sept 9D04204 CNC Technology And Programming Previous Question Paper || Download M.Tech 2nd Sem 9D04204 CNC Technology And Programming Question Paper || JNTU Anantapur M.Tech Previous Question Paper

Code: 9D04204


M.Tech II Semester Supplementary Examinations August/September 2018
CNC TECHNOLOGY & PROGRAMMING
(CAD/CAM)
(For students admitted in 2013, 2014, 2015 & 2016 only)

Time: 3 hours Max. Marks: 60

Answer any FIVE questions
All questions carry equal marks
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1 (a) Discuss the importance of CNC machine tools over conventional machine tools and present the
results in a tabulated form.
(b) With schematic diagrams, explain the working principle of CNC machine tools and indicate various
elements in CNC machine tools.

2 (a) Discuss the constructional features of spindle drives with an illustration.
(b) Explain any six functions / characteristics of CNC machine tool slide ways.

3 (a) Describe the role of Automatic Tool Changers (ATC) in machining centers with schematic diagrams.
(b) Sketch the schematic view of a CNC machine tool with its accessories.

4 (a) With schematic diagram, explain the construction and working principle of rotary encoder.
(b) Explain the concept of Moire fringe method in displacement measurement of CNC machine table.

5 (a) Differentiate between sensors and transducers. Highlight any four types of sensors / transducers.
(b) Discuss the working principle and characteristics of electro-magnetic positional transducers.

6 (a) With a block diagram, explain the open-loop and closed-loop control systems.
(b) Discuss standard features of CNC control systems.

7 (a) Explain the APT programming language structure with one example.
(b) Discuss APT motion commands with examples.

8 (a) Explain the factors influencing while selecting CNC machine tools.
(b) Describe the method of calculating the machine-hour-rate with one example.

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