Length-Section Light Scanner Discrete Part Length Measurement

Optical Micrometer for the final measurement of discrete parts during lengthwise transport

μMETER-SLM product series is used for the non-contact final measurement of discrete parts lengths in the production process, while transporting the discrete parts in longitudinal direction. The highly accurate measurement of the optical light scanner generally serves the production optimization, the good/bad sorting as well as the documentation of the delivery condition of discrete parts. The SLM product series is based on a worldwide unique LED length-section light scanner measurement technology called Optical Micrometer/Measuring Light Scanner. SLM systems are maintenance-free, permanently calibrated and measure largely independent of material. SLM systems are used for the highly accurate, non-contact length measurement of profiles, tubes, plates, beams, bolts, struts, hubs made out of a wide variety of materials. SLM length-section light scanner for discrete part length measurement are available in two versions. By the standard SLM system, discrete parts up to approx. 5 m in length can currently be measured, depending on the system length. The two-parted SLM/2 systems are used for the re-measurement of discrete parts with a length longer than 5 m, or when no continuous SLM measuring arrays can be used.

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Measurement Principle
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Product Types

Product Types – Length-Section Light Scanner Discrete Part Length Measurement System

µMETER-SLM

Standard SLM systems with continuous transmitter and receiver arrays for a highly precise final measurement of discrete parts being transported in longitudinal direction – measurement of plates, profiles, tubes, beams, bolts, rolls, … up to a maximum of 5 m length

Length-Section Light Scanner Discrete Part Length Measurement Systems
LED-based transmitted light sensor consisting of light transmitting array and light receiving array
Currently for measurement material lengths of 10 mm to a maximum of 5 m
Typical measurement accuracy of +/- 0,1 mm per meter measurement length
Measurement in material flow up to 240 m/min
Maintenance-free, permanently calibrated
Easy integration in existing conveyor technology
Sorting control – optional
Sorting mechanism – optional
Conveyor technology – optional

µMETER-SLM/2

SLM System with two-parted transmitter and receiver arrays for a highly accurate final measurement of discrete parts up to 15 m being transported in longitudinal direction

SLM/2 is used for discrete parts with lengths between 5 m and 15 m
SLM/2 is used for machines in which a continuous sensor arrays can’t be put into operation
SLM/2 is also used, if an inexpensive but nonetheless accurate solution for discrete parts with different lengths is required and if the user is willing to move a sensor part to the estimated target length
Several SLM/2 systems can also be operated in series to increase the measuring range

Technical Data

Technical Data – Length-Section Light Scanner Discrete Part Length Measurement Systems

µMETER	SLM-L0.1	SLM-L4.8	SLM/2-Lx
System Components	Transmitter and Receiver Arrays	Transmitter and Receiver Arrays	Two-Parted Transmitter and Two-Parted Receiver
Types	shortest SLM System	longest currently available SLM System	Measurement Range of max. 4,5 m (e.g. for part lengths of 10 m to 14,5 m)
Measurement Material Length	10 mm to 126 mm	10 mm to 4.860 mm	Based on the Project
Systematical Measurement Accuracy	± 0,1 mm/m	± 0,1 mm/m	typically: ± 0,1 mm/m (Based on the Project)
Repetitive Accuracy	± 0,03 mm (confidence interval 1σ)
SLM Arrangement of Transmitter and Receiver to each other	horizontal, vertical or diagonal
V-Measurement Range	0,1 m/min → 250 m/min	0,1 m/min → 100 m/min (higher Vmax on request)	Depending on Sensor Length and Module Distance
Measurement Distance between Transmitter and Receiver Array	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 Lines: IP50
Dimensions (LxWxH)	Sensor Lines: 30x30mm Profil cross section, Bosch-Rexroth, Length depending on maximum measurement material length
Power Supply	12 – 24 VDC
Weight	Sensor Lines: 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

Accessories for Length-Section Light Scanner Discrete Part Length Measurement Systems

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.

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.

Measurement Principle

Length-Section Light Scanner Discrete Part Length Measurement Systems

The discrete part to be measured passes through the SLM System without stopping in longitudinal direction. As soon as the discrete part is located completely between both sensor arrays (a light transmitter array and a receiver array), a measurement is automatically triggered. To ensure that the measurement takes place with high accuracy, the discrete part already has to be separated while in supply, however, a distance between two subsequent discrete parts of only 10 mm to 50 mm is sufficient. In addition, the measurement object should pass the SLM system as straight as possible. Because the SLM system 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 error. Furthermore, it is beneficial if the edges of the measurement object are cut at right angles and there are no ridges, cutting waste or chips left over on the front surface. The active measurement light line is only 2 mm high and is located in the middle of the sensor profile, which has a cross-section of 30 x 30 mm. The sensors are called “optical micrometer” or “measuring light scanner” for non-contact discrete part length measurement.

SLM/2 – Measurement Principle (Sideview):

Videos

Videos – Length-Section Light Scanner Discrete Part Length Measurement Systems

Product-Tutorial – SLM Length-Section Light Scanner Part Length Measurement Systems – SLM Setup
Application Video – SLM Length-Section Light Scanner Part Length Measurement Systems – Manual Tube Measurement
Application Video – SLM Length-Section Light Scanner Part Length Measurement Systems -Measurement of profile length with SLM
Application Video – SLM Length-Section Light Scanner Part Length Measurement Systems Measurement of film sheet length after cutting, before sorting/packaging
Application Video – SLM Length-Section Light Scanner Part Length Measurement Systems Length Measurement on cut tubes
Application Video – SLM Length-Section Light Scanner Part Length Measurement Systems Width Measurement of rolls
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
Application Video – SLM Length-Section Light Scanner Part Length Measurement Systems Width Measurement of Rolls with SLM