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Electro-Hydraulics

Electro-Hydraulics. General School Valves Modules Theory System Design. Proportional Control Advantages. Provides Infinitely Variable Control Controls Acceleration and Deceleration Smooth, Shock-less Motion Reduced Cycle Times Open and Closed Loop Control Position and Velocity Control

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Electro-Hydraulics

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  1. Electro-Hydraulics General School Valves Modules Theory System Design

  2. Proportional Control Advantages Provides Infinitely Variable Control Controls Acceleration and Deceleration Smooth, Shock-less Motion Reduced Cycle Times Open and Closed Loop Control Position and Velocity Control Easy to interface with machine PLC

  3. Motion Control Basics

  4. Motion Control Basics CHI DeAccelatrol - Motion Controller since 1969!

  5. Electro Hydraulic Training School “Teaser” “What is Stroke Dependent Deceleration? (and why does my customer care?)”

  6. Valve Performance - Coils On-Off Valve Shifted Centered

  7. Valve Performance - Coils Proportional Valve Shifted Centered

  8. 0 % Shift 50 % Shift 100 % Shift P > A B > T

  9. “M” valves (good) Most economical Rugged environments “G” valves (better) On Board electronics Valve to valve interchange “J” valves (best) On board electronics with LVDT Closed Loop position control

  10. Standard Valve construction

  11. Valve with spool position

  12. Linear Variable Differential Transformer spool motion

  13. Linear Flow Gain- Spool designs Progressive Two stage

  14. Spool Metering Combination (Equal Meter) Meter Out Meter In

  15. 2 slots 2:1 metering spools 4 slots

  16. Regeneration Spool RL – center – all blocked RA – center – bleed to tank

  17. ZC Spool Positioning Control “Zero” Lap Spool (slightly underlapped)

  18. Valve Performance Spool Lap

  19. Valve Performance Pressure Gain

  20. Valve Performance Hysteresis caused by Static Friction(Stiction)

  21. Valve Performance Operating Limits (performance envelope) Bernoulli forces

  22. Valve Nominal Pressure Drop High Delta P = High System Stiffness You pay for Good Control (stiffness) with less efficiency Servo rated 70bar (1000psi) Proportional rated 10bar (150psi)

  23. Valve Performance Step Response

  24. Valve Performance Dynamic response 1. Amplitude Reduction 2. Phase Lag

  25. Valve Performance Bode Plot

  26. VED03M-J

  27. Competition crossover – What to pay attention to 1. Frame size example: D03, D05 2. Spool Center condition example: A, F, Z 3. Flow ratings example: 26 lpm at 10 bar 4. Step response example: 30 msec at 0 to 100% 5. Frequency Response example: 20Hz at -3db example: 25Hz at 90 degree lag 6. Pressure gain example: delta psi per % command

  28. Competition crossover - electronics 1. On board or off board “J/G” or “M” 2. With or without LVDT “J” or “G” 3. Input command voltage 0 to +/-10v “E0” current 4 to 20 mA “E1” 4. Enable

  29. OBW / OBC Industry Interchangeable 7 Pin Connector IP 65 / 67

  30. E0 Voltage Command is Standard 0-10 VDC E1 Optional Current Input Available 4-20 mA

  31. Summary 3 Performance Levels + Matches most brands actual performance + Directly interchangeable + Flexibility to “build” your system efficiently + Safer + No wasted pilot flow as in servo valves + More contamination tolerant than servo valves + Competitively Priced & Free Software = Overall Better Value!

  32. Product Range- Proportional Flow Control Valves EF08 EF10 EF12 EDF

  33. EF10 / EF12 Proportional Flow Control Cartridges C10-3 up to 7.5 GPM (28 lpm) C12-3 up to 15.8 GPM (60 lpm) 3500 PSI (240 Bar) Excellent resolution throughout entire range 2 way / bidirectional

  34. EF08 Proportional Flow Control Cartridge Designed for very precise flow Dual flow gain 1st half very precise 0.05-10 cipm 2nd half up to 80 cipm or up to 145 cipm

  35. Proportional Pressure Relief Valves D03 Direct Operated D03 Piloted R06, R08, R10 versions

  36. VER03M D03 Proportional Relief - Direct Operated Direct Operated 0.26 GPM (1 lpm) rated flow 1.32 GPM (5 lpm) maximum flow With or without OBE 4 Pressure Range options up to 5000 PSI (345 Bar) Integrated Air Bleed and Gauge Ports

  37. VER03MP D03 Proportional Relief - Pilot Operated Pilot Operated 8 GPM (30 lpm) rated flow 13.2 GPM (50 lpm) maximum flow With or without OBE 4 Pressure Range options up to 5000 PSI (345 bar) Integrated Air Bleed and Gauge Ports

  38. VER*SP Proportional Relief Valves R06, R08, and R10 sizes Flows to 132 gpm With or without OBE

  39. VEP03M-3 Pressure Reducing/Relieving Valve D03 Manifold Mounted 1 or 2 solenoids (A, B or A & B control) 3 Pressure Ranges available

  40. VEP03MSV-PDRP Proportional Pressure Reducing/ Relieving Valve D03 Modular Stack mounting 3 Pressure Ranges available up to 3300 PSI (225 Bar) on controlled port P Port only

  41. Continental Electronic Module family All digital - no pots to turn Consistent “One cable - one software” Easy to use Cost effective

  42. How and where do you sell these products? You are selling motion control! You must help the systems integrator pick the best value components for the system.

  43. Family of DIN rail mounted modules Open Loop controls Analog input Switch input Closed Loop controls Pressure Flow Closed Loop Position Analog and Digital feedback Closed Loop Synchronization Motion of two cylinders

  44. Open Loop Control CEM-AA General purpose amplifier Wide range of analog signals - voltage or current Drives any single or dual solenoid pressure or flow valve CEM-AC Mounts to single solenoid DIN valve Wide range of analog input signals - voltage or current Drives any single solenoid pressure or flow valve

  45. CEM-RA Switch input Ramp Amplifier All of the features of the CEM-AA, plus switch inputs Trapezoidal “DeAccelatrol” motion profile Since 1969!

  46. Closed Loop Control Pressure, Force or Speed CEM-PA Analog command Analog feedback classic PID theory of error correction Built in single channel amplifier CEM-PID voltage output to drive “G” or “J” valve

  47. Closed Loop Control of Position CEM-SA Analog command - Analog Feedback CEM-SD Analog command - SSI Digital Feedback both use Stroke Dependent Deceleration

  48. Closed Loop Control Synchronization of two cylinders CEM-MS Used in pairs Analog command - Analog Feedback uses Stroke Dependent Deceleration

  49. Electro Hydraulic Training School “Teaser” “What is Stroke Dependent Deceleration? (and why does my customer care?)”

  50. Valve Electrical Accessories Programming Cable Programming Boxes Connectors and Cordsets

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