Safety. Detection. Control. · Safety. Detection. Control. ... sensitivity Selectable...

Safety. Detection. Control.

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Light curtains for measurement automation and control

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Safety. Detection. Control.11 2017 3MICRON ENG - REV. 2.1.1


Micron, the new compact light curtains, have been conceived for those industrial and automation applications in which object detection measurement and recognition are necessary in real time

Depending on the number and position of the intercepted beams

Micron is able to provide the relevant information to a PC or PLC Detect the presence or absence of objects

Perform a count

Detect a position

Detect a shape or a profile

Measure dimensions

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Compact light curtain for measurement applications


Cross-section size: 28 x 30 mm

Beam spacing: 5, 10, 25, 30, 50, 75 mm

Controlled height: from 150 to 3000 mm

Operating range 2,5 m models with beam spacing 5 mm

0…2 m (low) and 1…10 m (high) – models with beam spacing 10 and 30 mm

0…3 m / 0…8 m (low) and 0…8 / 1…18 m (high) – models with beam spacing 25, 50 and 75 mm

Protection grade IP 65 e IP 67

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Compact light curtain for measurement applicationsCharacteristics


AV (0/10 VDC) analogue output, AC (4/20 mA) analogue output

Solution providing simple measurement with easy interfacing. Ideal for object measurement and detection of dimensional limits

Micron A

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Compact light curtain for measurement applicationsMicron range

RS-485 serial line + two solid state outputs 0/24V with programmable functions

Solution providing complete and detailed information on the status of each beam via the RS-485 serial line and, by means of the two solid state outputs, further on/off information related to the occurrence of the programmed conditions.Ideal for dimensional measurement, detection of object profile and position

Micron B

Two solid state antivalentoutputs 0/24V without the need of programming

Solution providing simple on/off information related to the status of the controlled area. Ideal for piece counting and detection of object presence/absence in the controlled field

Micron C


Measurement of the height of objects in transit on conveyor systems

Two-dimensional detection of objects in transit on conveyor systems with use of 2 light curtains

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Compact light curtain for measurement applicationsApplications


Detection of position and profile of pieces in automatic painting systems

Quality control: correct object positioning verification

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Loop control Measurement of the width and position of panels or sheets of material in transit on roller units or conveyor belts

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Detection of vehicles overall dimensional limits for handling in automatic parking garages

Measurement and identification of cylinders of various sizes

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Automatic warehouses

Detection of maximum height of the objects present in the boxes for efficient management of the machine’s capacity

Special models with beams spacing: 25, 50, 75 mm

The special optics of these light curtains allow detection of small objects in quick motion

Applications


Specs

Beam spacing 5, 10, 25, 30, 50, 75 mm

Max. range

2,5 m: models with beams spacing 5 mm6 m: model for automatic warehouses with beams spacing 25, 50, 75 mm 12 m: models with beams spacing 30 mm18 m: models with beams spacing 10, 25, 30, 50, 75 mm

Controlled height 150 – 1500 mm (beam spacing 5 mm)150 – 3000 mm (beam spacing 10, 25, 30, 50, 75 mm)

Cables Non-shielded with length up to 50 m

Signals and diagnostics LEDs

Operating temperature -10/55 °C; -25/50 °C for WTFH case versions

Protection grade IP 65 and IP 67; versions with IP69K thanks to WTF / WTFH case

Power supply 24 VDC ± 20%

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Compact light curtain for measurement applicationsTechnical features


Compact light curtain for measurement applicationsBeams spacing

Example showing MI 300 model

10 mm

25 mm

30 mm

50 mm

75 mm

5 mm64,5

61,5

69

61,5

69

69

5

10

25

30

50

75

9

11

19

32

44

69


MicronConfigurator software for PC, with graphic user interface, is supplied with each light curtain (models A and B only)

Models A and B are provided with an M5 4-pole connector for parameter configuration and monitoring of the light curtain

USB interface to be connected to a PC using the CSU M5 cable

M12 connectors for main connections

Up to 50 m of electrical connections with unshielded cables

Possibility of connection of up to 3 Micron B light curtains as nodes of an RS-485 serial line for simultaneous detection of multiple dimensions and complex measurements

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Micron MI AV

2 analogue outputs (0/10 VDC) with programmable functions + 2 programmable digital outputs 0/24V PNP 100 mA

Micron MI AC

2 analogue outputs (4/20 mA) with programmable functions + 2 programmable digital outputs 0/24V PNP 100 mA

Micron MI B

RS-485 serial line output (up to 8 nodes) + 2 programmable digital outputs 0/24V PNP 100 mA

Micron MI C

2 solid state 0/24V antivalent PNP 100 mA

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Configurable emitter power emission and receiver sensitivity

Selectable synchronisation between emitter and receiver: optical or via cable

Selectable scan cycles: 1, 2, 3

1 trigger inputs (on receiver) (Micron A and B only) with programmable functions and Teach-In start

Graphic user interface displaying light curtain operation in real time

Pre-programmed models available on request

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Micron AC/AV/B models are fitted with a dedicated M5 connector (leading from the receiver) for easy connection to a PC where MicronConfigurator Software is installed

CSU M5: Barrier-to-PC connecting cable. 2 meters cable with M5 4-pole connector and USB A connector

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Compact light curtain for measurement applicationsMicron-PC connection via USB cable for software configuration

M5 4-polefemale connector

120 mm


Beams must always be numbered in bottom-to-top direction, as shown in the figure

When synchronised via cable, the last beam can also be used for measurements

When optically synchronised, the uppermost beam must never be obstructed as this would interrupt the measurement function

The following measurements can be assigned to the output FBO First beam obstructed

LBO Last beam obstructed

CBOCentral beam obstructed

NBONumber of beams obstructed

NCBO Maximum number of consecutive beams obstructed

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Compact light curtain for measurement applicationsBeam positioning

Synchronism

Beam 1

Beam 2

Beam 3

Beam 4

Beam 5

Beam 6

Beam n-1

Beam n (sync)


AV barrier voltage output corresponds to the measurement performed according to the following formula:

Vo = ((10V / beams no.) x measurement)

E.g.: with a 30-beam barrier and an NBO measurement of 15, Micron voltage outputs will be: Vo = ((10V / 30) x 15) = 5V

AC barrier current output corresponds to the measurement performed according to the following formula:

Io = ((16mA / beams no.) x measurement) + 4mA

E.g.: with a 26-beam barrier and an LBO measurement of 13, Micron current outputs will be: Io = ((16mA / 26) x 13) + 4mA = 12mA

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Compact light curtain for measurement applicationsMeasurement method

Synchronism

Beam 1

Beam 2

Beam 3

Beam 4

Beam 5

Beam 6

Beam n-1

Beam n (sync)


Compact light curtain for measurement applicationsMicronConfigurator Software



Barriers’ characteristics are automatically recognised by the software

Synchronism configuration

Synchronisation between TX and RX can be set in the following ways Via-cable synchronisation: connecting the

SYNC signals of emitter and receiver

Optical synchronisation: using the last beam of the barrier

Receiver sensitivity configuration

Receiver sensitivity can be adjusted according to the distance between transmitter and receiver Normal sensitivity: recommended for d >

50cm

Reduced sensitivity: recommended for d < 50cm

MicronConfigurator Software

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Orientation configuration

Beam numbering can be set according to the barrier orientation Normal orientation: low connectors (first

beam in low position)

Upturned orientation: high connectors (first beam in low position)

Scan-cycle configuration

The number of cycle used to perform measuring can be configured 1-cicle: fast measuring process, less precise,

sensitive to light interference

2-cicle: measuring process with good balance between speed and precision

3-cicle: high precision measuring process, slower process, non-sensitive to light interference


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Input pin functions

Input pin can be configured according to the following settings Disable: no functionality

Trigger: can be used to enable digital and analogue output, to trigger stand-by and to start/stop measuring

Start Teach-In: can be used to configure the barrier to a determined object pattern


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Teach-In

This function can be used to set the barrier to recognise a particular object or pattern. This can be done in three different ways, see table below


Option Description

1 Moving object recognition

Objects to be recognised must be opaque (without transparency points) and occupy a certain number of contiguous beams. The barrier shall recognise the memorised object in any position within the measuring range

2 Fixed object (pattern) recognition

Objects to be recognised can have any shape, be completely opaque or with transparent points. The barrier shall recognise the object only when it occupies the same memorised position

3 Blanking Objects to be recognised can have any shape, be completely opaque or with transparent points. Objects are normally part of the machinery (i.e. moving arms, protections, etc.) occupying part of the measuring range. The barrier will non count this object in the measuring process

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Digital output configuration

1. Disabled output

2. Output always enabled

3. On-trigger/recognition

Detected value selection

FBO First beam occupied

LBO Last beam occupied

CBO Central beam occupied *

NBO No. of occupied beams

NCBO No. of consecutive occupied beams *

BNO n-beam occupied


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Compact light curtain for measurement applicationsMonitoring function



10 and 30 mm beam spaced models have a Push Pull 0/24VDC PNP/NPN digital output

When switched-on, the barrier automatically recognises the type of connection and self-sets

The two exits are independent and can be connected for example to a PNP load and a NPN load simultaneously

Micron versions with Push-Pull digital outputs

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Applications


This particular application requires to detect the maximum height of the stored goods in order to maximise the system overall capacity

Small high-speed moving items are detected thanks to a custom developed optic set

Furthermore, Micron xxD is customised to satisfy the needs of automated warehousing applications, including Accuracy of the reading in every position of the storing drawer:

left, right or centre positioned

Ability of measuring small dimension objects (less than 2 mm at 600mm/sec)) particularly during the high-speed transit of the storing drawers in front of the barrier

Immunity to optical reflections

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Compact light curtain for measurement applicationsMicron xxD: customised version for automated warehousing


Storing drawers are withdrawn/deposited in the relevant picking bays via an automated elevator

The warehouse integrated automation systems controls all safety and measuring functions of the machine

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Compact light curtain for measurement applicationsMicron ACD: customised version for automated warehousing


The system must be able to measure the maximum height of the items stored in each storing drawer in order to determine the correct positioning within the storing bays, maximising the system overall capacity

This specific measurement is achieved with a dedicated measuring barrier located inside the warehouse system (see red circle)

Measurement is required to be accurate on all sides of the storing drawer (right, left and centre) as well as being immune to optical reflections that could eventually alter the data

Measuring

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Compact light curtain for measurement applicationsMicron xxD: customised version for automated warehousing


Compact light curtain for measurement applicationsTextile machines – Finishing processes

This particular application requires the detection of the position, the width and and the possible presence of holes or rips of the fabric during the finishing process

The fabric in process flows with speeds of more than 1 meter per second

The problem is the correct detection of the fabric when it is light and semi-transparent

The power and the characteristic of normal beams do not allow a reliable detection as the beam passes through the tissue that is not detected with continuity

ReeR developed a high sensitivity (HS) version (working range from 0 to 500 mm) of Micron ideal for a reliable detection in this application and similar ones


Compact light curtain for measurement applicationsGlass and wood machines – Painting and finishing processes

This particular application requires the detection of the position, the width and the shape of the panels to be painted or worked

The robotic spray system is driven by the information detected by the light curtain

The Reading Barrier at the inlet ensures high definition in the acquisition of shape, size, piece position, to automatically generate the best spraying paths


Compact light curtain for measurement applicationsAutomatic reciprocators for industrial painting

The light curtain detects the dimensions of the piece at the entry and drive the reciprocators and the spraying system


Compact light curtain for measurement applicationsMarble and granite processing – Polishing machines

The light curtain detects the dimension, position and shape of the marble slabs to be polished

The plates are supported in a horizontal position on the conveyor system. The barrier is positioned horizontally above and below the conveyor belt


Compact light curtain for measurement applicationsAutomated carton packing systems

Automatic packer receives and arranges the bottles arriving from the filling section, pick them up in a desired quantity and format and place them in cartons or crates



The machine picks up the bottles and the light curtain, placed horizontally, must verify that there are no remaining bottles on the conveyor. If a one or more bottles have not been picked-up micron detect the their presence and position

The problem is the reliable detection of the bottles as they are transparent

The power and the characteristic of normal light curtain do not allow a reliable detection as the beams could passes through the bottles without detecting them

The Micron xxD special version can perform a reliable detection in this application

Automated carton packing systems


11 2017MICRON ENG - REV. 2.1.1

Thank you.

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