Encoder

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Encoder

  1. 2. Presentation: Fundamentals Of Mechatronics
  2. 3. Topic: ENCODERs
  3. 4. Presented To: Engr. Hafiz Khurrum Ali
  4. 5. Presented By: Ahmad Abbas 07-MCT-24 M. Umair Mirza 07-MCT-26 Abdul Rahman 07-MCT-36
  5. 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
  6. 7. TYPES OF SENSORS Acceleration Angular/Linear position Chemical/Gas concentration Humidity Flow rate Force Magnetic field Sound
  7. 8. ENCODER A device used to change a signal or data to a code
  8. 9. BASIC PRINCIPLE
  9. 10. ENCODER TYPES LINEAR ENCODER OPTICAL ENCODER ROTARY ENCODER
  10. 11. LINEAR ENCODER Scanning unit and Scale
  11. 12. CONSTRUCTION
  12. 13. MEASUREMENTS PRINCIPLE OPERATION
  13. 15. TYPES OF LINEAR ENCODER ABSOLUTE LINEAR ENCODER INCREMENTAL LINEAR ENCODER
  14. 16. VERSIONS ENCLOSED LINEAR ENCODER EXPOSED LINEAR ENCODER METAL BASE LINEAR ENCODER
  15. 17. ENCLOSED LINEAR ENCODER USES
  16. 18. EXPOSED LINEAR ENCODER USES
  17. 19. METAL BASE LINEAR ENCODER
  18. 20. ADVANTAGES OF THESE VERSIONS Reduce breakage and system down time Eliminate costly maintenance Greater productivity Easily itegrated into existing system Good repeatbility
  19. 21. APPLICATIONS Machine control Automatic process Pick and place operations
  20. 23. OPTICAL ENCODER
  21. 24. Optical Encoder: Optical Encoder is a electro-mechanical device and is a digital position measuring device.
  22. 25. Principle: Its work on a principle of looking at pattern of alternating black and white segments.
  23. 26. Construction: Light source Light sensor Rotating Disk Shaft
  24. 27. Working:
  25. 28. Types: Regular Encoder Quadrature Encoder
  26. 29. Regular Encoder: It count number of transition but cannot tell the direction.
  27. 30. Quadrature Encoder: It uses two staggered pattern and tell which way the thing is turning.
  28. 31. Sensors used by Optical Encoder. Reflective Sensor Break Beam Sensor
  29. 32. Break Beam Sensor: More accurate but require precise mechanical allignment
  30. 33. Reflective Sensor Consist of LED and Photosensor
  31. 34. Models:
  32. 38. Specification: Temperature 0 to 60 degree Speed 600 RPM Weight 400 gms
  33. 39. Applications: N.C Machines Digital liquid level Neutron and X-Ray spectrometer
  34. 40. ROTARY ENCODER
  35. 41. Rotary Encoder: * Electromechanical Device * Convert position in to digital or analog code.
  36. 42. Types of Encoder: Absolute Incremental (relative)
  37. 43. Absolute Encoder: To determine angular position Incremental Encoder: To determine change in angular position
  38. 44. Incremental Rotary Encoder
  39. 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
  40. 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
  41. 50. ABSOLUTE ENCODER
  42. 51. * Concentric Circles * Opaque and Transparent segment 512 segments in outermost ring of whose has 10 rings
  43. 52. Difference between Incremental and Absolute
  44. 53. Models
  45. 57. Applications: Robotics Photographic lenses Computer Input device e.g TrackBalls Radar plateform
  46. 58. Thanks!!!!!!!!!!

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