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Next is Hysteresis Error

Next is Hysteresis Error. Defined as:. Click to Run Test. Explain the operation. Click Options then MAC. Run Mac Trace. Applying a 10volt command – note fast response time and quick fill on 1 cu.in . volume.

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Next is Hysteresis Error

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Presentation Transcript

  1. Next is Hysteresis Error

  2. Defined as:

  3. Click to Run Test

  4. Explain the operation Click Options then MAC

  5. Run Mac Trace

  6. Applying a 10volt command – note fast response time and quick fill on 1 cu.in. volume

  7. Applying 0 volt command note fast response and quick exhaust time on 1 cu. In. volume CLICK OPTIONS / SURF / SMC / START

  8. This is the Piezo Type – a Constant Bleed System CLICK HERE TO MUTE SOUND

  9. LET’S IDENTIFY THE PARTS CLICK

  10. TALK ABOUT THE PARTS BUT POINT OUT THE SMALL ORIFICES AS THEY RELATE TO RESPONSE TIME AND CONTAMINATION CLICK

  11. Put the cursor here to activated yellow highlighted area and click on it

  12. Again, small orifice results in longer response time and susceptible to contamination. CLICK

  13. AS CONTAMINENTS BUILD UP THROUGH SMALL ORIFICE YOU CAN HAVE COIL BURNOUT. CLICK

  14. BURNOUT CLICK

  15. TAKING A CLOSER LOOK AT THE SMALL ORIFICE’S CLICK

  16. CLICK TO GO TO NEXT SLIDE CLICK

  17. LET’S APPLY 10 VOLT COMMAND CLICK

  18. NOW THAT THE 10 VOLT IS COMMANDED LET’S FOLLOW THE SEQUENCE OF OPERATION CLICK

  19. NOTICE THE FLAPPER AREA

  20. Flapper deflects down reducing orifice Bleed creating back pressure on piston/ diaphragm

  21. Piston/Diaphragm moves down, shifts poppet, air begins to flow

  22. VOLUME CHAMBER BEGINS TO FILL

  23. PRESSURE ACHIEVED

  24. BUT UNDERSHOOTS THE 100 PSI

  25. TRANSDUCER SENSES PRESSURE ACHIEVED, SIGNALS SENT TO BOARD

  26. FLAPPER DEFLECTS UP, OPEN ORIFICE RELIEVES BACK PRESSURE ON PISTON/DIAPHRAGM

  27. POPPET CLOSES RETURNING TO CONSTANT BLEED

  28. LET’S APPLY 0v COMMAND

  29. DUMP VALVE IN CLOSED POSITION

  30. DUMP VALVE DISC LIFTS UP – AIR EXHAUSTS

  31. VOLUME CHAMBER BEGINS TO DECAY

  32. VOLUME APPROACHES ZERO

  33. ZERO

  34. TRANSDUCER SIGNALS BOARD

  35. EXHAUST VALVE TURNS OFF

  36. BLEED ORIFICE RETURNS TO NORMAL CONSTANT BLEED

  37. LET’S COMARE WITH MAC CLICK

  38. MAC VS SMC ENERGIZED TRACES SHOWING RESPONSE AND FILL TIME - LETS COMPARE

  39. THE COMPARISON TRACES SHOW ENERGIZE RESPONSE TIMES OF Mac 6ms to SMC 200ms and fill time of 100ms vs 1000ms

  40. MAC VS QB1 DEENERGIZED TRACES

  41. DEENERGIZED COMPARISON

  42. LET’S COMPARE BOTH ENERGIZED AND DEENERGIZED TOGETHER – MAC HAS A BETTER RESPONSE TIME CLICK ON RESET

  43. LET’S EXAMINE THE SMC DESIGN CLICK ON FLAPPER HIGHLIGHTED AREA

  44. NOTE THE CONSTANT BLEED CLICK

  45. THE ELECTRONICS IS BEING EXPOSED TO AIR PRESSURE, CONTAMINATION, AND MOISTURE CAUSING BOARD TO BURN OUT WAIT FOR THE NEXT SCREEN TO APPEAR

  46. BURNOUT CLICK

  47. NOTE THE SMALL ORIFICE AREA THAT IS SUBJECT TO CONTAMINATION BUILD UP CLICK

  48. WE WILL NOW PROCEED TO A 2 VALVE DESIGN CLICK OPTIONS/ PROPORTION AIR / START

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