Baumer BA Scatec2 User Manual

SCATEC-2

Laser Copy Counter
FLDK 110G1003/S14

FLDK 110G1003/S42
FLDK 110C1003/S42
FLDK 110G1005/S14
FLDK 110G1005/S42
FLDK 110G1006/S14
FLDK 110x10/xxxxxx

User manual

Manual SCATEC-2 2 Baumer Electric AG
Version 2011-05

www.baumer.com

Frauenfeld, Switzerland

General notes

Rules for proper
usage

This product represents a precision measuring device which has been
designed for the detection of objects and parts. It generates and provides
measured values issued as electrical signals for following systems.

Unless this product has not been specifically marked it may not be used in
hazardous areas.

Set-up

Installation, mounting and adjustment of this product may only be executed
by skilled employees.

Installation

Only mounting devices and accessories specifically provided for this product
may be used for installation.

Unused outputs may not be connected. Unused strands of hard-wired
sensors must be isolated. Do not exceed the maximum permissible bending
radius of the cable. Before connecting the product electrically the system
must be powered down.
Where screened cables are mandatory, they have to be used in order to
assure EMI protection. When assembling connectors and screened cables
at customer site the screen of the cable must be linked to the connector
housing via a large contact area.

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0 Table of Contents

1. Safety information and Certifications

2. Introduction

3. Principle of operation

4. Part identification

5. Terms and definitions

6. Signal sequence

7. Installation

8. Adjustments

9. Instructions for use

10. Specifications

11. Accessories

12. Maintenance

13. Troubleshooting

14. Varying data for customized FLDK 110x10/xxxxxx

FLDK 110x10/xxxxxx

Check section 14 for data
and information varying
from the standard manual !

Manual SCATEC-2 4 Baumer Electric AG
Version 2011-05

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1 Safety information and Certifications

The laser diode installed in the SCATEC-2 emits visible red light.
This laser belongs to the Class 2 laser standard specified by the
IEC 60825-1 / 2007.

Avoid looking directly into the beam for long periods. Brief
irradiation of the eye (0.25 sec) that can occur during an
accidental glance is not regarded to be dangerous.

However, the laser should not be aimed deliberately at people. The
laser beam should also be blocked at the end of its intended path.

Scatec-2 complies with the following safety standards:

Complies with 21CFR 1040.10 and 1040.11 except for deviations
pursuant to laser notice No.50, dated June 24, 2007

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2 Introduction

SCATEC-2 has the same key feature as all the other sensors from the SCATEC family: The capability
of non-contact detection of object edges. SCATEC is the sensor of choice when it comes to detect flat
objects conveyed in an overlapping stream or individually. The sensors in the SCATEC family were
developed and highly optimized particularly with regard to the specific demands of non-contact counting
of overlapping paper sheets and newspapers. Therefore the printing industry will be the ideal area of
application for the SCATEC.
Generally speaking a SCATEC sensor reacts to an edge facing the sensor’s laser beam. If the laser
beam strikes such an edge, SCATEC responds with an electrical output pulse of fixed duration.
However, built-in software allows the sensor among other things to suppress the reaction to certain
edges which were identified by the sensor as “false edges”. Therefore, SCATEC-2 makes it possible to
count newspapers to the highest degree of accuracy even at high conveyor speed.

Within the SCATEC family, the SCATEC-2 is characterized by the following properties:
(For details see specifications of the individual Scatec-2 types.)

• counts edges from a thickness of 0.2 mm and greater

• optimum working distance: 40 mm or 100 mm

• intelligent false pulse suppression

• parameter setting by means of DIP-switches

• counting rate up to 600,000 copies per hour

• with interface for remote control and data analysis

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3 Principle of operation

Described simply, the SCATEC-2 consists of a laser light source and two photodetectors. The beam is
aimed diagonally at the objects to be detected. Photodetector R is located close to the laser light source
and photodetector V a little further away. The sensor measures the ratio between signal v (light
scattered forward) and signal r (light scattered backward).
The ratio v/r differs widely depending whether the beam strikes on a flat surface or on an edge. When
an edge moves into the laser beam, the direct line of sight from detector V to the point of contact of the

laser is obstructed, which reduces signal v, and the edge
also increases the backward scattering, causing signal r to
increase. Both effects cause ratio v/r to become
substantially smaller than with a flat surface. If ratio v/r falls
below a specific level, the sensor interprets this as an edge.

This principle of operation clearly demonstrates that:

• The orientation of the object to the beam is significant.
An edge facing towards the beam creates a small ratio
v/r, in contrast to an edge facing away from the beam.

• Edge detection is independent of the color, as only the
ratio of the light intensities and not the absolute value
is used for detection.

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4 Part identification

Edge-LED (yellow)

Sensor plug

Front window

Alignment aid

Lower edge of sensor

DIP-switches

DIP-switch cover

with screw

DIP-switches

O-ring

Power-LED (green)

Connector : .../S42

.../S14

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Version 2011-05

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5 Terms and definitions

For reference, the terms defined in this section are used throughout the manual.

Conveying plane

k

Front edge

Tail edge

d

Beam blocker

a

h

Running

direction

Mounting height: h Distance between the lower edge of the sensor and the conveying

plane.

Working plane The edge lies on the working plane. With thick overlapping copies, the

working plane is slightly higher than the top of the conveying plane on
which the copies are transported. Distance d is measured vertically to
the lower edge of the sensor.

Working distance: d Distance between the lower edge of the sensor and the working plane.

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Version 2011-05

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Overlap: a Distance between two successive edges, measured along the

conveying plane. (Also referred to as the object spacing.)

Edge thickness: k Thickness of the copy at the point where the edge is to be detected.
Front edge The edge of an object facing the laser beam. Front edges are detected

by the sensor.

Tail edge The edge of an object facing away from the laser beam. Tail edges are

not detected by the sensor unless they are pointing upwards.

Running direction The preferred running direction (front edges leading) is indicated. The

opposite direction is also permitted by the SCATEC-2.

Dead time t The sensor responds to an edge with an output pulse with length p.

The dead time begins when the
pulse is issued. The sensor can
only issue the next pulse after
both the dead time t and the
output pulse p have expired. This
means: an edge detected by the
beam while still either the dead
time t or the the output pulse p is
on does not initiate an output
pulse.

False pulse Output pulse generated by an edge which should not be counted.

Output pulse

Dead time

p

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6 Signal sequence

The yellow edge indicator LED lights as long as an edge is located in the beam. The output pulse is
issued at the end of the edge. The dead time begins when the output pulse is issued. During the dead
time and when issuing the pulse, the SCATEC-2 is inactive, i.e. an edge ending during the dead time or
the pulse issue of the previous edge will not initiate an output pulse. Therefore, the next output pulse
can only be issued after the dead time has expired and the output pulse has been issued.

yellow edge-LED

output pulse

(pulse length: p)

dead time

(period: t )

Running direction

on
off

high
low

on
off

time

t

p

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7 Installation

7.1 Electrical connection

Make the electrical connections as specified in Sections 10.2 Electrical data and 10.3 Pin assignement.

7.2 Mounting

(1) Mount the sensor at the nominal working

distance h (+/-3 mm) with the front
window parallel to the conveying plane.

(2) Adjust the sensor so that the laser beam

is aimed towards the edges to be
counted. When mounted correctly, the
overlap of the copies is facing in the
same direction as indicated in the
alignment aid. Note: the laser beam is
focused into a line which must be aligned
in parallel to the edge to be detected!

(3) Block the laser beam after the objects

whenever possible.

(4) Keep the window clean (remove any

fingerprints after mounting!).

(5) A direct line of sight from the laser impact

point to the entire front window must be
ensured.

Line focus perpendicular to

the

Scatec

housing

Beam blocker

+/- 3°

1

3

2

1

2

Clean window

4

5

Manual SCATEC-2 12 Baumer Electric AG
Version 2011-05

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Nominal working distance h FLDK 110x1003/Sxx 40 mm above the conveyor belt

FLDK 110x1005/Sxx 100 mm above the conveyor belt
FLDK 110x1006/Sxx
The resolution is dependent on the distance. The highest resolution is
achieved at the nominal working distance. (See also Section 10.6

Specific application data)
Angular tolerance max. +/- 3°
Overlap orientation The copies are counted when the edge facing the laser beam moves

through the beam. If an edge faces away from the beam, it is not

detected. Tail edges are therefore not counted unless they face upwards.
Running direction The SCATEC-2 permits both running directions. The edges facing the

laser beam (front edges) are detected by the sensor regardless of the

running direction.
Front window The direct line of sight from the impact

point of the laser to the entire front window

must not be obstructed by any hardware in

a distance range

d = 0 – 80 mm FLDK 110x1003/Sxx
d = 0 – 120 mm FLDK 110x1005/Sxx

FLDK 110x1006/Sxx

If mountings or other components are close

to this zone for any reason, you should

consult a technician from Baumer Electric

AG.