µMETER-SLM/2

Divided Measurement System for Discrete Part Length Measurement on parts up to approx. 15 m

μMETER-SLM/2 sensors are measurement systems with each, a divided transmitter and a divided receiver array for non-contact discrete part length measurement of goods during their longitudinal movement. SLM/2 systems are used for the final measurement of parts with a length of 5 m up to apprx. 15m, or if structurally no continuous SLM measurement arrays can be used. SLM/2 is generally permanently installed. To enlarge the length measuring range, it is also possible to connect several SLM/2 gauges in series, or to mount one of the two pairs of  light arrays so that it can be moved (e.g. on a rail). SLM/2 gauges are pre-calibrated ex works. However, the entire system can only be calibrated in the course of installation on site using reference parts. The typical measurement accuracy of the system is +/- 0.1 mm per meter measuring length. SLM/2 systems are used for production optimization, good/bad sorting and documentation of the delivery quality status of discrete parts. SLM systems work without contact, are maintenance-free and measure largely independent of material. Typical measurement materials are profiles, tubes, plates, sheets, boards, beams, bolts, … made of the most diverse materials.

Non-Contact Discrete Part Length Measurement

Product Types – SLM/2 divided measurement system for discrete part length measurement of long parts up to 15 m length

µMETER-SLM/2

System with two-part transmitter and two-part receiver array for highly accurate measurement of discrete part lengths during longitudinal transport. For parts with a length of up to approx. 15 m. The SLM/2 measurement concept is similar to the concept of the standard SLM system, however, the SLM/2 consists of two separate transceiver arrays which are connected by cable.

Application Cases SLM/2:

  • For the measurement of discrete parts > 5 m
  • For measurement material length differences of a maximum of 4.5 m – e.g. for part lengths from 2500 mm to 7000 mm, or from 10000 mm to 14500 mm.
  • Application if structurally no continuous sensor arrays can be used
  • SLM/2 is also used when a cheap but accurate solution for discrete parts of different lengths is needed and if the user is ready to move one sensor part to the expected target length
  • Enlargement of the length measuring range by the use of several SLM/2 gauges in series.

Properties SLM/2:

  • The partial sensor for detecting the material end edge consists of a SLM-L0.1 with additional plug connection
  • Different lengths of the partial sensor are available for detecting the leading material edge from 0.4 m to max. 4,5 m length
  • LED-based transmitted light sensor typical measuring accuracy of +/- 0.1 mm per meter measuring length
  • Measurement in the material feeding direction at up to max. 250 m/min (depending on the total system length)
  • Maintenance-free, permanently calibrated
  • Standard Interface: RS485
  • Integration in existing conveyor technology
  • Fieldbus – optional
  • Sorting control – optional
  • Sorting mechanism – optional
  • Conveyor technology – optional

 

Technical Data – SLM/2 divided measurement system for a discrete part length measurement on long parts up to 15 m length

µMETER SLM/2-Lx
System Components Two-parted transmitter and two-parted receiver arrays
Types Measurement range of max. 4,5 m (e.g. for part lengths of 10 m to 14,5 m)
Measurement Material Length typical 5 m to approx. 15 m (based on the project conditions)
Systematical Measurement Accuracy ± 0,1 mm/m (based on the project conditions)
Repetitive Accuracy ± 0,03 mm (confidence interval 1σ)
SLM Arrangement of Transmitter and Receiver to each other Horizontal, vertical or diagonal
V-Measurement Range Depending on sensor length and module distance
Measurement Distance between Transmitter and Receiver Arrays 150 mm to 1.000 mm
Interfaces 1 x RS-485
I/Os Input: Start, Gate, Calibration
Output: Status
I/O Type RS‐422 Gauge
Available Data Speed, Length, Signal Quality, Status, Valid Measurement
Feldbus Optional:
Profibus-DP, ProfiNet‐RT, Ethernet‐IP, …
Protection Class Sensor Arrays: IP50
Dimensions
(LxWxH)
Sensor Arrays: 30x30mm Profil cross section, Bosch-Rexroth, Length depending on maximum measurement material length
Power Supply 12 – 24 VDC
Weight Sensor Arrays: Depending on length – ca. 1 kg per meter of gauge array
LED Data 5mW, Infrared
Ambient Temperature 5 to 55°C ‐ not condensing, outside of temperature range external cooling / heating required
Humidity Environment should be dry

Accessories – SLM/2 divided measurement system for discrete part length measurement on long parts up to  approx. 15 m length

Standard Interface

Interface Box for PC Operation

SLM-BOX

Interface box for connecting the SLM system to a PC or laptop. Allows for easy connection and supply of the SLM sensor. With RS485 output interface and plug-in power supply.

Sensor Cable

Shielded Cables

SLM-K3, K10

Sensor cable for connecting the two SLM sensor lines with each other and for connection to an interface such as SLM box or bus module, a controller or a display.

Displays and Control Units

Length Display

SLM-DISPLAY-BOX

Interface box with length display for connecting the SLM system to a PC or laptop. Box with RS485 output interface and plug-in power supply.
Control/Control Unit

SLM-CONTROLLER

Display and Control Unit for the SLM sensors provide the following features:

  • Display of all measurement values
  • Display of sensor status
  • Input of preselection lengths
  • Reset of current length
  • Cutting contact, pre-contact output
  • Sensor parameterization
Sorting Control

SLM-SPS

The SPS sorting control for the SLM sensors provide the following features:

  • Operation via Touch-Screen
  • Display of all measurement values
  • Input of nominal lengths
  • Input of low and high tolerance values
  • Output of sorting signals
  • Product data management
  • Measurement data storage

Mobile Equipment

Measurement Tripod

SLM-TRI

The shorter SLM sensors are lightweight and therefore very well suited for mobile measurement in conjunction with the ELOVIS tripods (TRI). The TRI tripod consists of: tripod, boom with joint, sensor attachment to the boom with ball head and sensor mounting plate.

Software

PC Software

SLM-CMS

The CMS configuration and monitoring software is used for SLM operation, adjustment of setpoint and tolerance values as well as the display and storage of measurement values on a PC, laptop or tablet computer. The CMS software is mainly used for manual measurements.

Feldbus and Communication Modules

Profibus-DP, ProfiNet-RT, Ethernet-IP

µSPEED-PB, µSPEED-PN, µSPEED-EN

Standard bus interface modules with the following output: Length (in m) , speed (in m/s), status signal (valid/invalid)

Protective Casing

Casing for Air Purge

SLM-HSE

The stainless steel casing SLM-HSEe serves to protect the sensor lines from contamination and inappropriate ambient temperatures. The HSEe must be kept clean with suitable scavenging air.
Quick-Change Protective Foil

µSPEED-QCF

 

The quick-change protective foil μSPEED-QCF (Quick-Change Foil) is designed for use in harsh environments with heavily polluted ambient air. The QCF allows the replacement of an older protective foil in minutes and prevents the need to clean the actual glass of the sensor system.

Conveyor Technology and Sorting Technology

Conveyor Technology and Sorting Technology Conveyor technology, conveyor belts, carriages, slide rails, push-out devices and sorting machines are offered together with experienced partner companies.

µMETER-SLM/2 – Divided Measurement System for Discrete Part Length Measurement on long parts up to approx. 15 m length

SLM/2 gauges consist of each, a divided transmitter and a divided receiver array for non-contact discrete part length measurement of parts during their longitudinal movement. SLM/2 systems are used for the final measurement of parts with a length of 5 m up to apprx. 15m, or if structurally no continuous SLM measurement arrays can be used. The discrete part to be measured passes the SLM/2 System without stopping in longitudinal direction. As soon as discrete part is located completely between both pairs of sensor arrays which are connected by cables (both with a light transmitter array and a receiver array), a measurement is automatically triggered. To ensure that the measurement can take place with high accuracy, the discrete part already has to be separated during measurement, however, a distance between two subsequent discrete parts of only 50 mm in between two parts is sufficient. In addition, the measurement object should pass the SLM system as straight as possible, because the SLM gauge measures the shadowing of the measurement object in the transmitted light. If the measurement object is twisted or inclined, the measured projection can cause a measurement which is rather too long or too short, depending on the object’s width and torsion. Furthermore, it is beneficial, if the edges of the measuring object are cut with right angles and there are no ridges, cutting waste or chips left over on the front and end surface. The active measurement array is only approx. 2 mm high and is located in the middle of the sensor profile, which has a cross-section of 30 x 30 mm.

SLM/2 principle drawing (side view):

SLM standard – working concept:

 

Videos – SLM/2 divided measurement system for discrete part length measurement on long parts up to 15 m length

Application Video – SLM

Length-Section Light Scanner Part Length Measurement Systems

Part Length Measurement on short plastic profiles at high speeds

Application Video – SLM

Length-Section Light Scanner Part Length Measurement Systems

Part Length Measurement of 354 mm long plastic profiles after extrusion and cut

Application Video – SLM

Length-Section Light Scanner Part Length Measurement Systems

Small tubes in manual part guidance

Downloads – Length Section Light Scanner Discrete Part Length Measurement System

SLM – Product Overview

APPLICATIONS

Measure piece lengths up to 5m
in transmitted light

Do you still measure piece lengths by hand in samples? Incoming and outgoing material edges ensure increased wear and...

Measure part length up to approximately 15 m
in transmitted light

The final measurement of very large parts is complex, staff-intensive, but still prone to error. If the maximum measu...

Length Measurement of long parts
in reflection

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Measure part lengths
with free-form edges

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APPLICATION EXAMPLES

Length Measurement of profiles after cutting

High demands of the automotive, furniture, electronics or medical industry on the cutting accuracy of profiles make t...

Highly Accurate Non-Contact Part Length Measurement

Length Measurement of pipes after cutting

The final measurement of all tubes after the cutting allows a shortening of the setup time of the cutting system and ...

Test station for final part length measurement

If discrete part lengths are to be measured quickly and reliably and the measurement length has to be documented, the...

Length Measurement of sheets and plates

Metal sheets and boards are cut and then palletized. A final measurement is often done manually on the pallet stack. ...

Length Measurement of window profiles

Window profiles with lengths between 2.5 m and 7 m should be cut as precisely as possible and checked directly after ...

Measure the length of wood and chipboard

The woodworking industry is now confronted with high accuracy requirements. In order to make a profit, it is importan...

Width of paper rolls on the chain conveyor

Paper rolls are transported to the warehouse via chain conveyors after wrapping. Prior to storage, the rolls of paper...

Length of transparent plastic profiles

Even the final length measurement of translucent plastic profiles is easily and accurately possible with the non-cont...

Measure the length of metal parts, pipes, bolts, slugs

Metal parts such as pipes, bolts, rods, slugs should have the correct part length. When operating presses and forging...

Always there for you:
Bernd Engelsdorf

ELOVIS GmbH

Karl-Friedrich-Straße 14-18
76133 Karlsruhe, Germany

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

sales@elovis.de

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