Web Length and Width Measurement

during material movement, accuracy 1/10 mm

Widths of webs, tapes and wrapping goods are usually measured by hand in random samples, because touching measuring devices damage the products or because non-contact measuring devices are too costly. … At the beginning of the process, the edge trimming and the slitter are readjusted. Subsequently, if necessary, a manual control of the width. During the ongoing manufacturing process, the dimensions i.d.R. not be checked anymore. A check can only be made again on the finished product, the roll of material or the plate. If deviations occur, i.A. the entire roll or a batch declared as a scrap. In addition, the question arises of the correct total roll length. … The solution is non-contact systems that are easy to integrate and do not disrupt the regular production process. ELOVIS offers width and diameter measuring systems called μMETER for measuring webs, webs with widths up to approx. 2500 mm and an accuracy in the 1/10 millimeter range. In addition, the proven μSPEED length measuring systems are used. Non-contact measurement is performed on the μMETER and μSPEED systems during the product pass. The measurement is used for production optimization as well as the error message in case of exceeding of tolerance and the documentation of the delivery condition. All non-contact ELOVIS systems are maintenance-free, permanently accurate and measure largely independent of material.

Typical roll / spool materials:

  • Paper, Cardboard, Tissue, …
  • Film, foil, plastic packaging
  • Textiles, carpets, nonwoven, nonwoven fabric
  • Webs, sheets, foils of metal
  • Cable, wire, rope
  • Profiles, tubes, hoses, strands

Typical machines with measurement problems:

  • Roll Cutter, cross cutter
  • Winding machines, rewinders, slitters
  • Lengthwise cutter
  • Fabric inspection Machines
  • calendering machines
  • laminating machines

Application Examples

Matching Products and Services

Cross-Section Light Scanner
Width-Height-Diameter Measurement Systems

  • Non-contact width, height and diameter measurement in the production process or in a cycle
  • Highly precise cross section measurement, monitoring of dimensional tolerance, regulation and documentation
  • LED-based light scanner measurement technology, maintenance-free, optical, permanently calibrated
  • Optical micrometer in order to measure lengths of profiles, tubes, plates, beams, rolls

Length & Speed Measurement Systems

  • Non-contact length and speed measurement, optically by laser
  • Length and speed free of slippage, maintenance-free, permanently calibrated and accurately measured
  • The Laser-Encoder replaces tactile measurement via impeller, wheel, measurement roller, or machine drive
  • Measurement of agitated surfaces via laser-doppler surface velocimeter

ELOVIS Services

ELOVIS offer the following services in this area:

  • Consulting for non-contact width measurement
  • Measurement services
  • Rental measurement systems
  • Help in finding system malfunctions
  • OEM sensor developments in the field of width measurement of plates, webs, tapes

Always available for you:
Bernd Engelsdorf


Vincenz-Prießnitz-Straße 1
76131 Karlsruhe, Germany

T +49 721 933823-0
F +49 721 933823-23


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