Fms DLS Operating Manual

Operating Manual DLS

Digital Line Sensor for web guiding

Version 1.00 08/04 st

Freigabe Technik:

This operation manual is also available in german.

Please contact your local representative.

Diese Bedienungsanleitung ist auch in deutsch erhältlich.

Bitte kontaktieren Sie die Vertretung im zuständigen Land.

© by FMS Force Measuring Systems AG, CH-8154 Oberglatt – All rights reserved.

Operating Manual DLS

1 Functional description DLS

is a self adjusting digital line and edge sensor for web guiding applications.

DLS
The sensor provides illumination in different colours for maximum contrast of any
combination of colours. The sensor is able to choose the best illumination based on
integrated software.
The sensor can be programmed to search for lines, for edges or for whatever gives best
contrast. The parameters for optimal contrast will be stored after a calibrations process
and are the reference for the following production.
Polarity of contrast, line width are stored. This lets the sensor distinguish between the
guiding line and similar patterns, printed characters or marks.
The sensor can handle intermittent lines and also lines that are being touched or crossed
by a pattern.
The display shows the position of the line as a moving point according to it’s position
within the range of the sensor. An edge is being displayed as a moving bar from either
side (depending on contrast polarity).
The sensor can be positioned with the light spot and with the focussing aid that is
included.

2 Dimensions

Dimensions: 95x80x64 mm

3 Delivery scope

• Sensor DLS

• Connection cable (length according to specification).

• Focusing aid

• Mounting bracket

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Operating Manual DLS

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Operating Manual DLS

4 Installation

4.1 Mounting the sensor

The DLS must be installed in a fixed distance to the web. Ideally an idler roller with
small wrap angle or a bar is used to stabilize the web after the exit roller of the web guide.
The sensor requires a 20*20mm bar that has to be installed according to the picture
(fig.1). The focus pointer gives the exact position against the web. It can be removed after
the mechanical installation.
The 2 screws on the side of the sensor allow to tilt the sensor around the focus point. This
can be required with reflective material (fig.2)

fig. 1: Mounting of sensor dls00003

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Operating Manual DLS

fig. 2: Tilting device dls00001

4.2 Wiring

fig. 3: Connections DLS0005e

If the sensor is used with a built-in web guide controller in the steering frame FMS­webMASTER 020, the sensor is full wired with 300mm wire 4x0.14mm
plug M8x1. The plug will be attached directly to the complementary plug in the steering
frame.

2

and a screw-in

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Operating Manual DLS

5 Operating

5.1 Mode of operation

By pressing the Mode key for 3s the operator can choose between 3 modes. The mode
will switch to the next on every short pressure on the key and also indicate the chosen
mode in the display:

line (priority) or edge,
automatic detection by
sensor

Mode Display

line only

edge only

POWER

DLS Digital Line Sensor

fig. 4: Front panel DLS0006e

MODE

CALIBRATE

3s

5.2 Calibration for optimal illumination

By pressing key CALIBRATE for 2s the sensor starts a calibration process. The sensor is
searching for lines or edges according to the mode that has been set. This only takes
fractions of a second (the illumination flashes) and afterwards the configuration is stored
in the non-volatile memory and the display shows a growing bar according to the contrast
found for approx. 0.5s. Afterwards the sensor switches back to normal operation.

POWER

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5.3 Normal operation

In normal operation the display shows the position of the line or the edge. The first LED
is always lit to show power on.
If the line or edge is missing only the power LED is on. As soon as the line or edge is
present again the LEDs show the position again.

Examples of line/edge indication

Description Display

Line in center of sensor

Line close to right end of sensor

Edge clear/dark in center of sensor
Edge dark/clear close to right end of
sensor

The display can be viewed from top or frontal.

5.4 Holographic lines/edges

Holographic patterns can be followed after a calibration. The sensor automatically
switches on the best light sources. However, the nature of holograms is such that it they
can be seen only under a certain angle. Therefore it can be necessary to turn the sensor by
180degrees (such that the top display is bottom now) to achieve visibility of holograms.
Visibility of normal printed lines is not affected by turning the sensor.

Operating Manual DLS

6 Technical data

Sensing width 8mm
Resolution 6/100mm
Measuring rate 2ms
Output signal

0...10V
Power supply 24VDC (18…36VDC)
Temperature range 0 .. 45°C
Protection class IP 20

DLS

0V when the line or edge fully right
10V when the line or edge fully left

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Operating Manual DLS

FMS Force Measuring Systems AG
Aspstrasse 6
8154 Oberglatt (Switzerland)
Tel. [phone]
Fax [phone]
[e-mail]
www.fms-technology.com

FMS USA, Inc.
925 East Rand Road Suite 207
Arlington Heights, IL 60004 (USA)
Tel. [phone]
Fax [phone]
[e-mail]

8

FMS (UK)
Highfield, Atch Lench Road
Church Lench
Evesham WR11 4UG (Great Britain)
Tel. [phone]
Fax [phone]
[e-mail]