SICK airWiper User manual

OPERATING INSTRUCTIONS
airWiper
Needs-based cleaning for outdoorScan3

Described product
airWiper
Manufacturer
SICK AG
Erwin-Sick-Str. 1
79183 Waldkirch
Germany
Legal information
This work is protected by copyright. Any rights derived from the copyright shall be
reserved for SICK AG. Reproduction of this document or parts of this document is
only permissible within the limits of the legal determination of Copyright Law. Any modi‐
fication, abridgment or translation of this document is prohibited without the express
written permission of SICK AG.
The trademarks stated in this document are the property of their respective owner.
© SICK AG. All rights reserved.
Original document
This document is an original document of SICK AG.
2O P E R A T I N G I N S T R U C T I O N S | airWiper 8027429/2022-05-20 | SICK
Subject to change without notice

Contents
1 About this document........................................................................ 5
1.1 Scope......................................................................................................... 5
1.2 Target groups of these operating instructions........................................ 5
1.3 Additional information.............................................................................. 5
1.4 Symbols and document conventions...................................................... 5
2 Safety information............................................................................ 7
2.1 General safety notes................................................................................ 7
2.2 Intended use............................................................................................. 7
2.3 Requirements for the qualification of personnel.................................... 7
3 Product description........................................................................... 9
3.1 Device overview........................................................................................ 9
3.2 Design and function................................................................................. 10
4 Project planning................................................................................ 11
4.1 Needs-based cleaning using the airWiper.............................................. 11
4.2 Example: situation-dependent cleaning with different intensities........ 14
4.3 Example: two-stage cleaning, triggered by warning field or contami‐
nation warning.......................................................................................... 17
4.4 Example: single-stage cleaning, triggered by small warning field or
contamination error.................................................................................. 21
4.5 Multiple safety laser scanners with airWiper.......................................... 25
5 Mounting............................................................................................. 26
5.1 Connecting the compressed air hose...................................................... 26
5.2 Detaching the compressed air hose....................................................... 26
5.3 Replacing the compressed air connection.............................................. 26
6 Maintenance...................................................................................... 28
6.1 Regular cleaning....................................................................................... 28
6.2 Maintenance of the compressed air supply........................................... 28
6.3 Regular thorough check........................................................................... 28
7 Troubleshooting................................................................................. 30
7.1 Troubleshooting........................................................................................ 30
8 Technical data.................................................................................... 31
8.1 Data sheet................................................................................................. 31
8.2 Compressed air consumption.................................................................. 31
8.3 Dimensional drawings.............................................................................. 32
9 Ordering information........................................................................ 34
9.1 Ordering information for the airWiper kit................................................ 34
10 Annex.................................................................................................. 35
CONTENTS
8027429/2022-05-20 | SICK O P E R A T I N G I N S T R U C T I O N S | airWiper 3
Subject to change without notice

10.1 Example: Compressed air supply with compressor................................ 35
11 List of figures..................................................................................... 37
12 List of tables....................................................................................... 38
CONTENTS
4O P E R A T I N G I N S T R U C T I O N S | airWiper 8027429/2022-05-20 | SICK
Subject to change without notice

1 About this document
1.1 Scope
Product
This document applies to the following products:
•Product code: airWiper
Document identification
Document part number:
•This document: 8027429
•Available language versions of this document: 8027361
You can find the current version of all documents at www.sick.com.
Other documents relevant for the product
Table 1: Available documents
Document Title Part number
Operating instructions outdoorScan3 Core I/O 8023150
Operating instructions outdoorScan3 – EtherNet/IP™ 8023153
1.2 Target groups of these operating instructions
Some sections of these operating instructions are intended for certain target groups.
However, the entire operating instructions are relevant for intended use of the product.
Table 2: Target groups and selected sections of these operating instructions
Target group Sections of these operating instructions
Project developers (planners, developers,
designers)
"Project planning", page 11
"Technical data", page 31
Installers "Mounting", page 26
Safety experts (such as CE authorized repre‐
sentatives, compliance officers, people who
test and approve the application)
"Project planning", page 11
"Technical data", page 31
Operators "Troubleshooting", page 30
Maintenance personnel "Maintenance", page 28
"Troubleshooting", page 30
1.3 Additional information
www.sick.com
The following information is available on the Internet:
•Data sheets and application examples
•CAD data and dimensional drawings
•Certificates (e.g. EU declaration of conformity)
•Guide for Safe Machinery Six steps to a safe machine
1.4 Symbols and document conventions
The following symbols and conventions are used in this document:
ABOUT THIS DOCUMENT 1
8027429/2022-05-20 | SICK O P E R A T I N G I N S T R U C T I O N S | airWiper 5
Subject to change without notice

Safety notes and other notes
DANGER
Indicates a situation presenting imminent danger, which will lead to death or serious
injuries if not prevented.
WARNING
Indicates a situation presenting possible danger, which may lead to death or serious
injuries if not prevented.
CAUTION
Indicates a situation presenting possible danger, which may lead to moderate or minor
injuries if not prevented.
NOTICE
Indicates a situation presenting possible danger, which may lead to property damage if
not prevented.
NOTE
Indicates useful tips and recommendations.
Instructions to action
bThe arrow denotes instructions to action.
1. The sequence of instructions for action is numbered.
2. Follow the order in which the numbered instructions are given.
✓The check mark denotes the result of an instruction.
1 ABOUT THIS DOCUMENT
6O P E R A T I N G I N S T R U C T I O N S | airWiper 8027429/2022-05-20 | SICK
Subject to change without notice

2 Safety information
2.1 General safety notes
Product integration
DANGER
The product can not offer the expected protection if it is integrated incorrectly.
bPlan the integration of the product in accordance with the machine requirements
(project planning).
bImplement the integration of the product in accordance with the project planning.
Mounting and electrical installation
DANGER
Death or severe injury due to electrical voltage and/or an unexpected startup of the
machine
bMake sure that the machine is (and remains) disconnected from the voltage
supply during mounting and electrical installation.
bMake sure that the dangerous state of the machine is and remains switched off.
Repairs and modifications
DANGER
Improper work on the product
A modified product may not offer the expected protection if it is integrated incorrectly.
bApart from the procedures described in this document, do not repair, open, manip‐
ulate or otherwise modify the product.
2.2 Intended use
The intended use of the safety laser scanner is described in the operating instructions
of the safety laser scanner.
The airWiper is used to clean water droplets off the optics cover.
2.3 Requirements for the qualification of personnel
The product must be configured, installed, connected, commissioned, and serviced by
qualified safety personnel only.
Project planning
You need safety expertise to implement safety functions and select suitable products
for that purpose. You need expert knowledge of the applicable standards and regula‐
tions.
Mounting, electrical installation and commissioning
You need suitable expertise and experience. You must be able to assess if the machine
is operating safely.
SAFETY INFORMATION 2
8027429/2022-05-20 | SICK O P E R A T I N G I N S T R U C T I O N S | airWiper 7
Subject to change without notice

Operation and maintenance
You need suitable expertise and experience. You must be instructed in machine oper‐
ation by the machine operator. For maintenance, you must be able to assess if the
machine is operating safely.
2 SAFETY INFORMATION
8O P E R A T I N G I N S T R U C T I O N S | airWiper 8027429/2022-05-20 | SICK
Subject to change without notice

3 Product description
3.1 Device overview
Overview
7
8
9
2
3
4
5
6
1
Figure 1: Device overview
1Mounting kit 3
2outdoorScan3
3airWiper
4Compressed air connection B2
5Compressed air connection A2
6Splash guard
7Compressed air connection A1
8Compressed air connection B1
9Weather protection hood
PRODUCT DESCRIPTION 3
8027429/2022-05-20 | SICK O P E R A T I N G I N S T R U C T I O N S | airWiper 9
Subject to change without notice

3.2 Design and function
Overview
1
3
2
5
5
4
6
7
Figure 2: Safety laser scanner with airWiper
1outdoorScan3
2airWiper
3Air nozzle
4Air blasts on the curved part of the optics cover (channel B)
5Air blasts on the base (channel A)
6Compressed air connection A1
7Compressed air connection B1
Design
The airWiper is mounted on the safety laser scanner as an accessory. On the inside
and underneath are air nozzles through which compressed air is directed at the optics
cover.
The nozzles on the inside, and the inner air nozzles underneath are used for cleaning
the base. They are supplied with compressed air via the compressed air connections
A1 and A2 (channel A). The outer air nozzles underneath are used to clean the curved
part of the optics cover. They are supplied with compressed air via compressed air
connections B1 and B2 (channel B).
The compressed air connections of a channel are not connected to each other. Connec‐
tions 1 and 2 of each channel must be supplied with compressed air together, e.g., via
a T-connector.
The compressed air supply, controller, valves, etc. are not part of the airWiper. These
are additionally required.
Function
Compressed air lines are connected to the compressed air connections. When the
optics cover needs to be cleaned, compressed air is passed through the lines. Com‐
pressed air exits through the air nozzles and blows water droplets off the optics cover.
Further topics
•"Example: Compressed air supply with compressor", page 35
3 PRODUCT DESCRIPTION
10 O P E R A T I N G I N S T R U C T I O N S | airWiper 8027429/2022-05-20 | SICK
Subject to change without notice

4 Project planning
4.1 Needs-based cleaning using the airWiper
Overview
To enable the airWiper to clean the optics cover using compressed air when required,
valves are located between the compressed air supply and the airWiper. A controller
opens the valves when cleaning is required. The controller can open the valves on
manual request or on a signal from the safety laser scanner.
The airWiper can only clean the optics cover effectively if the pressure system and the
activation are tailored to the specific requirements. The following examples serve as
a guide. You need to adapt the examples to the application and the compressed air
supply used, and optimize them in a targeted manner.
Prerequisites
•The safety laser scanner is mounted with the optics cover facing down.
•The safety laser scanner is protected from the ambient conditions during opera‐
tion. It is protected by the weather protection hood or by mounting it in a cladding,
as described in the operating instructions of the safety laser scanner.
•The safety laser scanner is mounted so that no small objects (e.g., cables) are in
the protective field, even if the safety outputs do not switch to the OFF state as a
result.
•There are no objects (e.g., cables) between the base and the curved part of the
optics cover that could interfere with the contamination measurement.
•The requirements on the compressed air are met, see "Technical data", page 31.
Automatic cleaning operation
You can use signals from the safety laser scanner to trigger the cleaning.
The safety laser scanner continuously measures the contamination of the optics cover.
You can use the signals Contamination warning and Contamination error to trigger the
airWiper. In addition to or instead of this, warning fields can serve as triggers.
You can evaluate the signals of the safety laser scanner using a controller. The control‐
ler activates the compressed air for the individual channels via valves. In the case of
the outdoorScan3 Core I/O, you can also directly control individual components such as
relays and valves without a controller. The electrical data of the outdoorScan3 Core I/O
can be found in its operating instructions.
Two stage cleaning
Two-stage cleaning is particularly effective in many cases and requires less compressed
air than single-stage cleaning. In two-stage cleaning, channel A first cleans the base.
Channel B is then additionally activated so that both channels clean the base and
the curved part of the optics cover together. This two-stage cleaning step is usually
repeated several times in one cleaning operation.
Stop criteria and exclusion conditions
If the airWiper is triggered automatically, then in many cases it is useful to define stop
criteria and exclusion conditions.
The cleaning process ends as soon as the triggering signal is no longer present or as
soon as the stop criterion occurs.
PROJECT PLANNING 4
8027429/2022-05-20 | SICK O P E R A T I N G I N S T R U C T I O N S | airWiper 11
Subject to change without notice

Examples:
•Stop criteria: Occasionally the airWiper cannot remove all contamination. Without
a stop criterion, the controller would trigger the airWiper again and again. This can
lead to increased energy consumption or premature draining of the compressed
air tank. If configured appropriately, the controller will abort cleaning after a rea‐
sonable time. In most cases, the optimum cleaning effect is achieved after a
maximum of 10 cleaning steps.
•Exclusion conditions: In certain situations, cleaning should not take place, for
example when the vehicle is stationary and there is temporarily a particularly
large amount of water present. If configured appropriately, the controller will ignore
signals that normally trigger the airWiper in such cases.
Depending on your application, you can implement the stop criteria and exclusion
conditions using a controller or using relays, switches, etc.
A
B
S
V
p
pt
t
t
32
5
1
4
Figure 3: Single stage cleaning
STrigger signal of the safety laser scanner, e.g., contamination warning, warning field
ACompressed air in channel A
BCompressed air in channel B
VVoltage
pPressure
tTime
1Stop condition: the cleaning process ends at this time at the latest, even if the contamina‐
tion has not been removed
2Cleaning with channel A and B
3Pause
4Cleaning step
5Cleaning process
4 PROJECT PLANNING
12 O P E R A T I N G I N S T R U C T I O N S | airWiper 8027429/2022-05-20 | SICK
Subject to change without notice

A
B
S
t
V
t
t
p
p
1
4
3
6
2
5
Figure 4: Two stage cleaning
STrigger signal of the safety laser scanner, e.g., contamination warning, warning field
ACompressed air in channel A
BCompressed air in channel B
VVoltage
pPressure
tTime
1Stop condition: the cleaning process ends at this time at the latest, even if the contamina‐
tion has not been removed
2Cleaning with channel B
3Cleaning with channel A
4Pause
5Cleaning step
6Cleaning process
Complementary information
When contaminated water dries, it leaves residues on the optics cover. The airWiper
cannot remove these residues. If you use a sensitive trigger, the airWiper can remove
the water before it dries so that cleaning is more thorough.
An oil-free compressor with a compressed air tank and filter regulator or a compressed
air bottle is required for the compressed air supply. For automatic cleaning, a controller
or individual components such as relays etc. are required.
The compressed air may cause unexpected noise during cleaning. Persons in the
vicinity should, if necessary, be made aware of the possibility of noise developing.
Further topics
•"Example: Compressed air supply with compressor", page 35
PROJECT PLANNING 4
8027429/2022-05-20 | SICK O P E R A T I N G I N S T R U C T I O N S | airWiper 13
Subject to change without notice

4.2 Example: situation-dependent cleaning with different intensities
Overview
3
2
1
5
6
5
44
Figure 5: Example: situation-dependent cleaning with different intensities (schematic representa‐
tion)
1Pushbuttons
2Control systems
3Safety laser scanners
4airWiper
5Valve
6Compressed air supply
The safety laser scanner with a network connection automatically triggers different
cleaning operations depending on the degree of contamination. The cleaning operation
can also be triggered manually.
The following cleaning operations are available:
•Two-stage preventive cleaning when a warning field reports a detection or
the safety laser scanner reports a contamination warning. Preventive cleaning
removes water droplets early so that the safety laser scanner does not switch to
the OFF state.
•Two-stage efficient cleaning when the safety laser scanner reports a contamina‐
tion error. Efficient cleaning removes water droplets when the safety laser scanner
has already switched to the OFF state.
•System cleaning when manually requested using a pushbutton. System cleaning
removes condensate from the compressed air lines and airWiper, e.g., after a long
downtime.
Prerequisites
Parts needed:
•Compressed air source
•Compressed air lines
•Compressed air valves
•Control systems
•Pushbuttons
•Electrical cables
4 PROJECT PLANNING
14 O P E R A T I N G I N S T R U C T I O N S | airWiper 8027429/2022-05-20 | SICK
Subject to change without notice

Configuration example
Figure 6: Warning field as a trigger for preventive cleaning
The warning field has approximately the same size as the protective field. The warning
field has a finer resolution and a lower multiple sampling setting than the protective
field so the warning field triggers the airWiper before the protective field reports a
detection.
PROJECT PLANNING 4
8027429/2022-05-20 | SICK O P E R A T I N G I N S T R U C T I O N S | airWiper 15
Subject to change without notice

Figure 7: Monitoring case table
The output of the warning field and the output of the contamination warning are
evaluated in the controller in such a way that they trigger the preventive cleaning.
The output of the contamination error is evaluated in the controller in such a way that it
triggers the efficient cleaning.
The button is evaluated in the controller in such a way that it triggers the system
cleaning.
Recommended parameters for cleaning
Preventive cleaning
1 Stop condition after 2 cleaning steps
2 Air supply for connections A: 200ms concurrently for each step
3 Air supply for connections B: For each step start 100ms after connections A,
duration 100ms
4 400ms pause
5 Total duration of a cleaning step: 600ms
Efficient cleaning
1 Stop condition after 4 cleaning steps
2 Air supply for connections A: 400ms concurrently for each step
3 Air supply for connections B: For each step start 200ms after connections A,
duration 200ms
4 400ms pause
5 Total duration of a cleaning step: 800ms
4 PROJECT PLANNING
16 O P E R A T I N G I N S T R U C T I O N S | airWiper 8027429/2022-05-20 | SICK
Subject to change without notice

System cleaning
11 cleaning step
2 Both channels concurrently
3 Air supply for connections A and B: 5s each
Complementary information
outdoorScan3 Core I/O:
•This example is only transferable to the outdoorScan3 Core I/O to a limited extent
as it only has a few outputs, especially if monitoring case switching is used.
If you suitably evaluate the network signals, you can use different conditions for the
start and end of the cleaning process:
•Cleaning operation starts in case of a contamination error.
•Cleaning operation is continued after the contamination error ends.
•Cleaning operation ends only when the contamination warning ends.
Other possible triggers:
•Fixed time interval
•Time interval that depends on the weather
•Small warning field as a trigger for efficient cleaning
Sensitivity of the warning field used as a trigger:
•The warning field should have a finer resolution than the protective field so it
detects contamination before the protective field reports a detection.
•The warning field should have a lower multiple sampling setting than the protec‐
tive field so it detects contamination before the protective field reports a detec‐
tion.
•The radius r of the warning field influences the sensitivity. r <1m: low sensitivity,
1m ≤ r ≤2m: medium sensitivity, r >2m: high sensitivity.
•If a warning field covers the entire scanning angle of 275°, it is very sensitive.
Contaminants are also detected and removed outside the area where protective
fields are located. If parts of the scanning angle are covered, e.g., by the vehicle
trim, the warning field must be appropriately adjusted.
•If a warning field only covers the area where protective fields are also located, it is
less sensitive. This enables, for example, the consumption of compressed air to be
reduced.
4.3 Example: two-stage cleaning, triggered by warning field or contamination warning
Overview
2
1
4
5
4
33
Figure 8: Example: two-stage cleaning, triggered by warning field or contamination warning
(schematic representation)
1Control systems
2Safety laser scanners
PROJECT PLANNING 4
8027429/2022-05-20 | SICK O P E R A T I N G I N S T R U C T I O N S | airWiper 17
Subject to change without notice

3airWiper
4Valve
5Compressed air supply
The outdoorScan3 Core I/O triggers two-stage cleaning when a warning field reports a
detection or when a contamination warning is present.
Prerequisites
Parts needed:
•Compressed air source
•Compressed air lines
•Compressed air valves
•Control systems
•Electrical cables
Configuration example
Figure 9: Warning field as a trigger for preventive cleaning
The warning field has approximately the same size as the protective field. The warning
field has a finer resolution and a lower multiple sampling setting than the protective
field so the warning field triggers the airWiper before the protective field reports a
detection.
4 PROJECT PLANNING
18 O P E R A T I N G I N S T R U C T I O N S | airWiper 8027429/2022-05-20 | SICK
Subject to change without notice

Figure 10: Contamination warning as a trigger for preventive cleaning
PROJECT PLANNING 4
8027429/2022-05-20 | SICK O P E R A T I N G I N S T R U C T I O N S | airWiper 19
Subject to change without notice

Figure 11: Monitoring case table
Universal I/O1 serves as an output for the warning field and for the contamination
warning. The output is evaluated in the controller in such a way that it triggers cleaning.
Recommended parameters for cleaning
Preventive cleaning
1 Stop condition after 2 cleaning steps
2 Air supply for connections A: 200ms concurrently for each step
3 Air supply for connections B: For each step start 100ms after connections A,
duration 100ms
4 400ms pause
5 Total duration of a cleaning step: 600ms
Complementary information
You can adapt the example to your application, for example by using only one of the
two signals as a trigger or by changing the duration of the cleaning. The parameters
should be selected in such a way that the improvement in availability is in reasonable
proportion to the consumption of compressed air and energy.
This example is transferable to devices with a network connection. In this case the
controller must evaluate both the signal for the warning field and the signal for the
contamination warning.
4 PROJECT PLANNING
20 O P E R A T I N G I N S T R U C T I O N S | airWiper 8027429/2022-05-20 | SICK
Subject to change without notice