Laser-based thickness measurement

High-performance laser-based thickness measurement is key for competitiveness in many production processes. In the Industry 4.0 era, the demands placed on the digitalization of production data are steadily increasing. Higher data densities lead to an ever more sophisticated understanding of process, more efficient production and higher, documented quality.

alpha.ti 4.0 is a milestone in laser-based thickness measurement: close to 20 years of experience have gone into this product, which was engineered from the ground up. Our top priority was making the system simple to integrate, simple to handle and simple to use. At the same time, accuracy and precision were increased even further, so as to ensure that QM-critical instrument capability is achieved even for the most demanding requirements. Equipped with an array of standard interfaces,  alpha.ti 4.0 enables flexible, customized integration in the plant equipment environment.

Future software options – if desired even custom expansions – allow alpha.ti 4.0 to grow flexibly with new demands, for instance for data filtering or data aggregation in the context of Industry 4.0.

Advantages of laser-based thickness measurement

Independence of material and surface topography, rapid measuring, minimal operating costs and safe handling are just the most important advantages of laser-based thickness measurement over tactile and other non-contact methods. Thickness calibration using reference samples and the resulting dependencies on alloy management and the accuracy of the reference body are now a thing of the past. nokra’s alpha.ti 4.0 laser thickness measuring system is wear-free and does not require any elaborate –and therefore costly – maintenance. This rapid, non-contact measuring method enables pinpoint measurement even on difficult surfaces and unusual or new topographies.

Laboratory standard

The simplicity and compact footprint of alpha.ti 4.0 means it can be used in new areas. Thus, cost-effective (plug & play) offline deployment in a measuring laboratory is possible with the same system used to measure thickness on the production line. Its optional sample scan mode delivers either a single measurement or a composite area thickness profile of an entire sample section, simply and easily – enabling you to efficiently optimize your processes through case-by-case evaluation or sampling, without online measuring.

Technical data

Feature alpha.ti 4.0-C-15 alpha.ti 4.0-C-25 alpha.ti 4.0-C-40
Measuring principle laser triangulation laser triangulation laser triangulation
Material thickness 0.01 mm - 5 mm 0.02 mm - 8 mm 0.05 mm - 15 mm
Material speed > 0 m/min, speed independent > 0 m/min, speed independent > 0 m/min, speed independent
Material temperature ≤ 100 °C ≤ 100 °C ≤ 100 °C
Residual moisture ≤ 400 mg/m2 (equally distributed) ≤ 400 mg/m2 (equally distributed) ≤ 400 mg/m2 (equally distributed)
Passline variation ± 5 mm ± 8 mm ± 12 mm
Passline angular deviation ± 1°* ± 1°* ± 1°*
Measurement range 15 mm 25 mm 40 mm
Measurement resolution 0.2 µm 0.4 µm 0.6 µm
Linearity ± 1.5 µm ± 2.5 µm ± 4 µm
Measurement frequency max. 67 kHz max. 67 kHz max. 67 kHz
Integration time 1 ms - 1.000 ms 1 ms - 1.000 ms 1 ms - 1.000 ms
Laser class 2 2 2
Laser power 1 mW 1 mW 1 mW
Laser wavelength 660 nm (red), 405 nm (blue, for non-metals) 660 nm (red), 405 nm (blue, for non-metals) 660 nm (red), 405 nm (blue, for non-metals)
Measuring spot diameter 50 µm 50 µm 50 µm
Laser lifetime 80,000 h @ 20 °C 80,000 h @ 20 °C 80,000 h @ 20 °C
Gap height 190 mm 190 mm 190 mm
Gap width 120 mm 120 mm 120 mm
Measurement gap depth 650/950/1150 mm* 650/950/1150 mm* 650/950/1150 mm*
Passline height ≥ 480 mm* ≥ 480 mm* ≥ 480 mm*
Cabinet size 600 mm x 400 mm x 1,100 mm (W x D x H) 600 mm x 400 mm x 1,100 mm (W x D x H) 600 mm x 400 mm x 1,100 mm (W x D x H)
Standard features automatic exposure & light control automatic exposure & light control automatic exposure & light control
  automatic thickness adjustment automatic thickness adjustment automatic thickness adjustment
  temperature independend sensor linearity temperature independend sensor linearity temperature independend sensor linearity
  alignment-free sensor express mounts alignment-free sensor express mounts alignment-free sensor express mounts
  quick-exchange sensor protection glasses quick-exchange sensor protection glasses quick-exchange sensor protection glasses
  measurement range change by sensor exchange possible measurement range change by sensor exchange possible measurement range change by sensor exchange possible
  system control via Profibus system control via Profibus system control via Profibus
  thickness value output via TCP/IP thickness value output via TCP/IP thickness value output via TCP/IP
  encoder input (AB-signal) encoder input (AB-signal) encoder input (AB-signal)
  ethernet service port ethernet service port ethernet service port
  user interface language German or English* user interface language German or English* user interface language German or English*
Safety features safe inputs for safety door and emergency-off safe inputs for safety door and emergency-off safe inputs for safety door and emergency-off
Documentation 
(English or German) all documents are shipped on one CD all documents are shipped on one CD all documents are shipped on one CD
  overview drawing overview drawing overview drawing
  electrical drawing (EPLAN) electrical drawing (EPLAN) electrical drawing (EPLAN)
  operator & maintenance manual operator & maintenance manual operator & maintenance manual
  operator & maintenance training documents operator & maintenance training documents operator & maintenance training documents
  risk assessment risk assessment risk assessment
  declaration of conformity declaration of conformity declaration of conformity
  spare part and wear & tear part list spare part and wear & tear part list spare part and wear & tear part list
Options sample scanning software module sample scanning software module sample scanning software module
  5 mW laser power for optically non-cooperative materials (laser class 3R)
 5 mW laser power for optically non-cooperative materials (laser class 3R)
 5 mW laser power for optically non-cooperative materials (laser class 3R)

  sensor water cooling (material temperature > 100 °C) sensor water cooling (material temperature > 100 °C) sensor water cooling (material temperature > 100 °C)
  system control via Profinet system control via Profinet system control via Profinet
  thickness value analog output thickness value analog output thickness value analog output
  sensor air knives
operator panel on cabinet, large display for measurement value sensor air knives
operator panel on cabinet, large display for measurement value sensor air knives
operator panel on cabinet, large display for measurement value
  UPS for Mikrobox-PC UPS for Mikrobox-PC UPS for Mikrobox-PC
  KVM-extender for Mikrobox-PC (without cabling) KVM-extender for Mikrobox-PC (without cabling) KVM-extender for Mikrobox-PC (without cabling)
  Windows-PC operator station including nokra user interface license Windows-PC operator station including nokra user interface license Windows-PC operator station including nokra user interface license
  manual, training documents and user interface texts in national language manual, training documents and user interface texts in national language manual, training documents and user interface texts in national language
Supply voltage 85 - 264 VAC, 50 - 60 Hz 85 - 264 VAC, 50 - 60 Hz 85 - 264 VAC, 50 - 60 Hz
Power consumption < 1 kW < 1 kW < 1 kW
Free cable length cabinet - gauge 2/5/10 m 2/5/10 m 2/5/10 m
IP protection class IP65 (cabinet & gauge) IP65 (cabinet & gauge) IP65 (cabinet & gauge)
Environment cabinet & gauges: -5 °C to 45 °C* cabinet & gauges: -5 °C to 45 °C* cabinet & gauges: -5 °C to 45 °C*
  RH 0 - 95 % non-condensing RH 0 - 95 % non-condensing RH 0 - 95 % non-condensing
Instrument air ≥ 4 bar, ~5 m3/h (for air knives only) ≥ 4 bar, ~5 m3/h (for air knives only) ≥ 4 bar, ~5 m3/h (for air knives only)
  ISO 8573-1, particle class 3, water class 3, oil class 3 ISO 8573-1, particle class 3, water class 3, oil class 3 ISO 8573-1, particle class 3, water class 3, oil class 3
Shipment and storage conditions -10 °C to 60 °C, RH 0 - 95 % non-condensing -10 °C to 60 °C, RH 0 - 95 % non-condensing -10 °C to 60 °C, RH 0 - 95 % non-condensing
Spare parts sensor protection glass sensor protection glass sensor protection glass
  triangulation sensor 15 mm, 25 mm or 40 mm triangulation sensor 15 mm, 25 mm or 40 mm triangulation sensor 15 mm, 25 mm or 40 mm
  Siemens Mikrobox-PC, software preinstalled Siemens Mikrobox-PC, software preinstalled Siemens Mikrobox-PC, software preinstalled
  UPS battery UPS battery UPS battery
  nokra sensor-controller interface card nokra sensor-controller interface card nokra sensor-controller interface card

* others on request

 

Download

Download: Brochure Thickness measurement alpha.ti 4.0

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