Electronic Pneumatic Position Control EPPC™

Real-time level control for highly dynamic and vibration sensitive machines and instruments.

EPPC™ real-time level control achieves an optimum production accuracy of +/- 10 µm and a significant reduction of the deflection and settling times in response to dynamic load changes Intelligent browser-based user interface for setting, diagnostics and monitoring.

EPPC™ real-time level control achieves an optimum production accuracy of +/- 10 µm and a significant reduction of the deflection and settling times in response to dynamic load changes Intelligent browser-based user interface for setting, diagnostics and monitoring.

General product description

Description

The Electronic Pneumatic Position Control EPPC™ provides optimum vibration isolation for high-precision machines, highly dynamic and vibration-sensitive measuring machines, microscopes and testing and production machines.
The EPPC™ can be combined with three to six BiAir® membrane air spring control groups to control up to six degrees of freedom. Bilz offer a wide range of different size air springs for system design.

System structure EPPC™

System structure (simplified)

System structure EPPC™ (schematic diagram)

Properties
  • Optimum positional accuracy (+/-10 µm)
  • Individually adjustable system parameters (such as damping)
  • Short deflection and settling times in response to load changes
  • One high-performance servo valve and one displacement sensor per degree of freedom
  • Optimised connecting system using CAN bus technology
  • Intelligent browser-based user interface for setting, diagnostics and monitoring, connection via Ethernet, remote maintenance possible
  • Operator status display (e.g. ready, working position, motion complete, error)
  • Digital I/O interfaces for external control and monitoring
  • Noise-free control due to high-resolution signal processing and servo-valve technology
  • Robust and proven air spring technology, can be combined with Bilz BiAir® membrane air springs
  • No disturbing heat generation, magnetic field fluctuations or high power consumption as in electromagnetic actuators

Technical Data and Variants
EPPC™

Note

The high-performance electronics, comprising a 14-bit AD converter and 16-bit signal processor, are integrated into the pressure control valves and so ensure virtually noise-free control. Losses (pressure drops) within the hose connections are minimised by directly connecting the pressure control valves to the respective air springs. The use of CAN bus technology means that the control unit can be installed up to 20 m away. The EPPC™ is consequently suitable for use in sensitive environments such as clean rooms or laboratories.

Notes on the graphic

Theoretical vibration curve of a mechanical-pneumatic level control system (MPN) compared to the EPPC™. At a deflection of -80 μm, the MPN reaches a stable position within +/-15 μm after approx. 0.75 seconds. With the EPPC™, the deflection time is reduced by approx. 45 % to 0.4 seconds.

Illustration of the vibration curve of a mechanical-pneumatic level control system (MPN) compared to the electronic level control system EPPC™.

Vibration curve of a mechanical-pneumatic level control system (MPN) compared to the electronic level control system EPPC™.

Technical data overview
Typical system load*
 
800 kg – 120.000 kg
 
Vertical natural frequencies*
 
1,2 – 2,5 Hz
 
Horizontal natural frequencies*
 
2,2 – 2,8 Hz
 
Type of control
 
Servo-pneumatic
 
Clean room suitable
 
yes
 
Communication interfaces
 
Ethernet, Digital I/O
 
SENSOR RESOLUTION:
 
 
Displacement measuring system
 
0,76 µm
 
Pressure sensor
 
0,36 mbar
 
Sampling rate sensor signals
 
1 kHz (after oversampling)
 

*Customised modifications possible

Solutions EPPC™

Applications
  • High-precision machines
  • Vibration-sensitive and highly dynamic measuring machines
  • Microscopes
  • Test and production machines in the semiconductor industry
Contact us

How may we help you?

Please contact our responsible sales representative. We look forward to your inquiry and will get back to you as soon as possible!

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