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Inspection systems for sheet-type running webs. For process optimisation in production lines or quality control at the machine entry or exit end.

Various systems are available to meet the characteristics of the given type of material, of the application conditions and of the task to be performed: for a higher return on investment thanks to better quality and higher productivity.

Inspection Of Opaque Surfaces

Material impervious to light is inspected in the reflective mode.

• single sided inspection of an inspection line
• double sided inspection of an inspection line
• several inspection lines at different scanning angles, for example bright area/dark area

Inspection Of Translucent Material

• Translucent material is inspected in the transmitted light mode. Depending on the web transparency differently strong light sources will shine through the web.
• Standard inspection by an inspection line

Combined inspection in the reflection and transmitted light modes by serveral inspection lines

Inspection cameras

Very compact intelligent CCD line cameras with integrated evaluation hardware and software (FPGA, DSP, PC).

• Different scanning frequencies for different web speeds
• Different numbers of pixels for different resolution requirements
• Automatic camera calibration for installation position, linearization and focussing
• Own development by Erhardt+Leimer
• Teleservice

A worldwide direct access to the inspection system via modem or VPN connection means considerable cost reduction and fast assistance.

Applications

Paper Production

Inspection systems are used in paper machines, coating machines and in paper processing. E+L offer solutions for the typical requirements of these industries.

• rapid scanning frequency for high production speeds
• high-resolution defect images
• extensive defect classification
• function modules for streak-type defects and repeat defects
• function module with 2D filters for low-contrast defects and water mark production
• statistical evaluation for production analysis
• Coating Lines

Inspection systems are used on coating lines for film, aluminium, paper and laminates. E+L offers solutions for the typical requirements of these industries:

• camera and light source arrangements at different angles depending on the given inspection defect
• high-resolution inspection system for tiny defects of micrometer size
• big selection of lighting systems
• extensive defect classification
• function modules for streak-type defects, repeat defects and concentration defects
• function module with 2 D filters for low-contrast defects
• statistical evaluation for production analysis
• Film and plastics industry

Inspection systems are typically used in blown film and flat film extruders. E+L offers solutions for the typical requirements of these industries:

• cost-effective camera solutions with high pixel resolution
• camera and light source arrangements at special angles to handle typical defects on films such as
• gels, inclusions, runmarks, burnt particles and particles which have not melted
• large selection of lighting systems
• clustering / defect accumulation
• function module with 2 D filters for low-contrast defects and water mark production
• statistical evaluation, for example gels/m² or general production trends

Metal Industry

Inspection systems are typically used in stretching lines, rolling lines and coating lines for metals. E+L offers solutions for the typical requirements of these industries:

• camera and light source arrangements at special angles to handle typical coating defects
• double-sided inspection for upper side and lower web side
• high-resolution inspection system for tiny coating defects in the micrometer range
• large selection of lighting systems
• extensive defect classifications
• function modules for streaks, repeats and concentration defects
• function module with 2 D filters for low-contrast defects
• statistical evaluation for production
• Nonwovens And Textile Industries

Inspection systems are used on nonwovens lines. E+L offers solutions for the typical requirements of this industry:

• camera and light source arrangements at special angles to handle typical defects on nonwovens such as
• thick areas, thin areas, fibres, spatters, insects or oil spots
• large selection of lighting systems
• extensive defect classifications
• function module with 2 D filters for thick and thin areas
• statistical evaluation for production

Graphic Arts Industry

Inspection systems are used in rotary offset presses and gravure presses for quality control on the web to be printed. E+L offers solutions for the typical requirements of this industry:

• record of paper defects such as holes or edge cracks following a web break
• automatic production number transfer from roll management
• printing press interface for the transfer of control signals
• automatic creation of a web break protocol to show the paper manufacturer
• statistical evaluation for production

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To contact Norman G. Clark about Web Control and Inspections | Elsis use Get a quote.