B.Tech Degree Examination, April 2013

B.TECH DEGREE EXAMINATION, APRIL 2013 Sixth Semester IC 010 606L01 – MECHATRONICS (2010 admissions-Regular)

Time: Three Hours Maximum: 100 Marks Part A Answer all questions briefly Each question carries 3 marks

1. Briefly explain about the scope of mechatronics in manufacturing and production? 2. What is interpolation? How does a circular interpolator work? 3. Give the functions of the following codes: G00, G01, G80, G84, M02, M05, M00 and M30? 4. What are the methods involved in material processing and device fabrication? 5. Briefly explain about the principle of nano technology with examples?

(5x3 = 15 marks) Part B Answer all questions briefly Each question carries 5 marks

6. With reference to an NC machine tool, discuss in detail open loop and closed loop NC system and incremental and absolute system? 7. Write short note on hydraulic actuators used as drives for NC machine tool? 8. Describe with the aid of a block diagram the various steps involved in computer aided part programming? Write any 3 definition of circle in APT? 9. Define the terms: Lithography, etching, ion implantation? 10. Explain the principle involved in tools-electron microscope and scanning electron microscope? (5x5 = 25 marks) Part C Answer any one question from each module. Each question carries 12 marks

Module 1 11. What are the methods of improving accuracy and productivity in NC machine tools? OR 12. Explain with neat sketches the different between open loop and closed loop system? Explain the working of an encoder?

Module 2 13. What is CNC software interpolation? Is it same as software DDA interpolator? OR 14. With constructional details, explain the working of a resolver?

Module 3 15. Describe the different types of tape formats in detail? OR 16. Explain computer aided programming with example? Short note on manual programming?

Module 4 17. Define wafer bonding and explain how it affects the fabrication process? OR 18. Briefly explain about the historical background of micro electro mechanical switch?

Module 5 19. Explain about the steps involved in fabricating a nano material? OR 20. Explain the fundamentals involved in nanotechnology with applications?

(5x12 = 60 marks)