2. Presentation: Fundamentals Of Mechatronics

3. Topic: ENCODERs

4. Presented To: Engr. Hafiz Khurrum Ali

5. Presented By: Ahmad Abbas 07-MCT-24 M. Umair Mirza 07-MCT-26 Abdul Rahman 07-MCT-36

6. SENSOR A device that produces a measurable response to a change in a physical condition CHOOSING A SENSOR Accuracy Calibration Cost Environmental Range Repeatbility Resolution

7. TYPES OF SENSORS Acceleration Angular/Linear position Chemical/Gas concentration Humidity Flow rate Force Magnetic field Sound

8. ENCODER A device used to change a signal or data to a code

9. BASIC PRINCIPLE

10. ENCODER TYPES LINEAR ENCODER OPTICAL ENCODER ROTARY ENCODER

11. LINEAR ENCODER Scanning unit and Scale

12. CONSTRUCTION

13. MEASUREMENTS PRINCIPLE OPERATION

15. TYPES OF LINEAR ENCODER ABSOLUTE LINEAR ENCODER INCREMENTAL LINEAR ENCODER

16. VERSIONS ENCLOSED LINEAR ENCODER EXPOSED LINEAR ENCODER METAL BASE LINEAR ENCODER

17. ENCLOSED LINEAR ENCODER USES

18. EXPOSED LINEAR ENCODER USES

19. METAL BASE LINEAR ENCODER

20. ADVANTAGES OF THESE VERSIONS Reduce breakage and system down time Eliminate costly maintenance Greater productivity Easily itegrated into existing system Good repeatbility

21. APPLICATIONS Machine control Automatic process Pick and place operations

23. OPTICAL ENCODER

24. Optical Encoder: Optical Encoder is a electro-mechanical device and is a digital position measuring device.

25. Principle: Its work on a principle of looking at pattern of alternating black and white segments.

26. Construction: Light source Light sensor Rotating Disk Shaft

27. Working:

28. Types: Regular Encoder Quadrature Encoder

29. Regular Encoder: It count number of transition but cannot tell the direction.

30. Quadrature Encoder: It uses two staggered pattern and tell which way the thing is turning.

31. Sensors used by Optical Encoder. Reflective Sensor Break Beam Sensor

32. Break Beam Sensor: More accurate but require precise mechanical allignment

33. Reflective Sensor Consist of LED and Photosensor

34. Models:

38. Specification: Temperature 0 to 60 degree Speed 600 RPM Weight 400 gms

39. Applications: N.C Machines Digital liquid level Neutron and X-Ray spectrometer

40. ROTARY ENCODER

41. Rotary Encoder: * Electromechanical Device * Convert position in to digital or analog code.

42. Types of Encoder: Absolute Incremental (relative)

43. Absolute Encoder: To determine angular position Incremental Encoder: To determine change in angular position

44. Incremental Rotary Encoder

45. Consist two pulses Second pulse used to determine the direction of rotation of encoder wheel First pulse gave information of incremental and direction of rotation information

48. Segments: 100 to 6000 3.6 degree of resolution for 100 segment 0.06 degree of resolution for 6000 segment Segement: Opaque and Transparent

50. ABSOLUTE ENCODER

51. * Concentric Circles * Opaque and Transparent segment 512 segments in outermost ring of whose has 10 rings

52. Difference between Incremental and Absolute

53. Models

57. Applications: Robotics Photographic lenses Computer Input device e.g TrackBalls Radar plateform

58. Thanks!!!!!!!!!!