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ELECTRONIC LEVEL CONTROL SYSTEMS ELECTRONIC PNEUMATIC LEVEL CONTROL EPN

Electronic-pneumatic level control system for use in dynamic and vibration-sensitive measuring machines as well as testing and production machines.

General PRODUCT DESCRIPTION

Electronic-pneumatic level control systems EPN are suitable for combination with BiAir® membrane air springs. By using
an intelligent control algorithm and electronic valves with flow rates of up to 250 l/min, significantly reduced deflections and decay times can be achieved compared to mechanical-pneumatic level control systems. The electronic-pneumatic level control systems from Bilz are therefore ideally suited for use in dynamic and vibration-sensitive measuring machines as well as testing and production machines.

TECHNICAL DATA

The EPN is designed as an integrated central control including valve technology in order to keep the space required on the machine and the assembly effort as low as possible. Only the hoses to the air springs, as well as the cables to the position sensors, must be attached directly to the machine.

3 control circuits can be monitored and regulated independently of each other using a PID controller. The height scanning is carried out for each control loop via a potentiometer and is processed with 16 bits. The system also has pressure monitoring for each control circuit as well as the air supply.

For easy commissioning, a web interface is implemented with which the parameters can be set.

Communication with a higher-level controller can take place via digital inputs/outputs as well as via a separate bus interface.

The EPN is optimized to cost-effectively implement electro-pneumatic level control of machines.

Reset accuracy±0.01mm
Reset speedFast
Regular restVery Good
damping15% passive from air spring
Valve typeSeat valve (proportional)
Application BiAirYes
Application FAEBIYes

System Structure

  • Successor of the proven EPN control system (retrofit)
  • Control of 3 degrees of freedom per control unit
  • Position accuracy < ± 0.01mm
  • Control of air springs via proportional valves
  • Compatible with BiAir® membrane air springs
  • Compatible with FAEBI® rubber air springs with additional filter
  • Adjustable system parameters via PID controller
  • Low deflections and settling times during load changes
  • Intelligent browser-based interface
  • Visualization (WebVisu) for adjustment and diagnostics
  • Remote maintenance possible
  • Industry 4.0 interface can be implemented
  • Shutdown to safe state even in case of power failure or pressure loss
  • No disturbing heat generation, magnetic field changes or high power consumption compared to electromagnetic actuators

Solutions

  • High leveling accuracy
  • Dynamic use cases
  • Production machines
  • Measuring machines

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