Launch KWA-300 User manual

LAUNCH KWA-300 3D Wheel Aligner
i
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TECH. CO., LTD. (LAUNCH for short) in China and
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referred to in this manual are either trademarks,
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Park, North of Wuhe Rd., Banxuegang, Longgang,
Shenzhen, Guangdong, P. R. China, to request written
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Copyright Information
Copyright © 2010 by LAUNCH TECH. CO., LTD. All
rights reserved. No part of this publication may be
reproduced, stored in a retrieval system, or transmitted
in any form or by any means of electronic, mechanical,
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prior written permission of LAUNCH. The information
contained herein is designedonly for the use of this unit.
LAUNCH is not responsible for any use of this
information as applied to otherunits.
Neither LAUNCH nor its affiliates shall be liable to the
purchaser of this unit or third parties for damages,
losses, costs, or expenses incurred by purchaser or third
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to this unit or failure to strictly comply with LAUNCH
operating and maintenance instructions.
LAUNCH shall not be liable for any damages or
problems arising from the use of any options or any
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Original LAUNCH Products or LAUNCH Approved
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General Notice
Other product names used herein are for identification
purposes only and may be trademarks of their
respective owners. LAUNCH disclaims any and all rights
in those marks.

LAUNCH KWA-300 3D Wheel Aligner
ii
Precautions
zPlease read the User’s Manual and the Installation
and Parts Manual carefully before operating
KWA-300 3D.
zOnly the qualified technician can operate the
WheelAligner.
zThe operator must have knowledge of computer
application and basic theory of wheel alignment.
zThe power voltage of KWA-300 3D is
AC220V±10% 50±1Hz /AC110V±10% 60±1Hz（It
can be customized according to the requirements
of customer）. The 3-terminal socket must be used,
and the earth terminal must be well grounded. If
the power voltage is not stable, please purchase
and useAC voltage stabilizer.
zBefore installing 3D wheel aligner, the lift should be
installed at first according to the requirements.
Regularly check the lift for fastening and leveling,
ensuring the test accuracy and personnel safety;
Take away the roadblocks around the lift to prevent
influencing operation.
zDon’t place KWA-300 3D on a vibrated objector an
oblique surface.Avoid direct sunlight and moisture.
zTurn off the power after operation. Check all bolts
and parts after maintenance, and tighten the
slackened bolts and parts in turn for safety.
zSince computer visual technology is used in
recognizing the targets mounted on the wheels
through the camera with high resolution, it is
necessary to keep KWA-300 3D away from the
outside infrared rays (e.g. sun-lights) from directly
lighting to the targets and reflecting to the cameras.
It is also necessary to avoid blocking the light way
from the targets to the cameras for a long time
during the instrument is working.
zThe targets of KWA-300 3D wheel aligner are the
key components for testing. Do not damage their
structures when using and storing. Keep the
surface of target clean. Please use the soft cloth
dipped with an appropriate amount of the neutral
detergent or the absolute alcohol to wipe the
surface of target lightly if there are some smuts on
it.
zThe wires inside the cabinet and the camera posts
are connected compactly. Don’t move them after
first installation.
zThe precision position calibration has been
performed for the cameras after first installation,
the user can not move or wobble the camera post
during or after using it.
zWithout approval of the supplier, please do not
disassemble the main unit and camera post in
order to avoid damaging the components,
influencing the test accuracy and increasing the
costs and difficulties of maintenance and repair.
For the damage caused by unauthorized
disassembling will not be covered by the Warranty.
zThe fastening method should be selected correctly
and flexibly according to the actual conditions of
the rim, the turning force should be equal when
fastening, after fastening, please check the wheel
clamp again.
zThe force should be equal when using each knob,
please don’t fasten it too tight in order to avoid
damaging the locking mechanism or other parts.
zAfter using, please cut off all power supplytimely.
zThe cameras of KWA-300 3D wheel aligner are the
key optical components for testing. Do not impact
them when using, keep the surface of the camera
lens clean. Please use the lens paper to wipe the
surface of the camera lens lightly if there are some
smuts on it.
General Safety
Instructions
Safety equipment may not be removed and/or
disabled.
Any work on the electrical installation may only
be performed by electricians.
The wheel alignment system may not be
operated in explosion-pronesurroundings.
The operator must provide appropriate fire
protection measures at the measuring platform. In
particular, any flammable or self-combusting items (such
as cloths soaked in solvents or oil) and fluids, or foreign
items and other ignition sources, should not be stored in
the tool trolley.
Warning symbol tags used:
Legend: Pull the power plug before
opening the housing!
Obligation by the operator to be
considerate and avoid negligent acts:
The equipment was designed and constructed with
consideration to required harmonized standards, as well
as additional technical specifications. It therefore
corresponds with the current state of technology and
provides the maximum standard in safety during the
operation.
The machine safety, however, can only be implemented
during the operation, if all of the required steps have

LAUNCH KWA-300 3D Wheel Aligner
iii
been taken. The operator of the machine has the
obligation to plan these actions and check their
compliance.
The operator must specificallyverify that:
zThe machine is only used according to
specifications.
zThe machine is only operated in perfect
operational condition and that the safety
equipment is routinely inspected as to their
operational condition.
zThe necessary personal safety equipment for
operating, maintenance and repair personnel is
available and being worn.
zThe operating instructions are always in a legible
condition and are completely available at the
machine location.
zThe machine is only operated, maintained and
repaired by qualified and authorized personnel.
zThis personnel is instructed routinely in all
pertaining questions of work safety and
environmental protection, and knows the operating
instructions, especially the safety instructions
contained therein.
zAll safety and warning labels attached to the
machine are not removed and are legible.
Concrete safety
instructions and applied
symbols
Concrete safety instructions are provided in the following
operating instructions which will point out any
unavoidable remaining risks during the machine
operation. These remaining risks contain hazards for:
Persons
Product and machine
The environment
Symbols used in the operating instructions should draw
attention to the safety signs!
This symbol points out that specifically
personal injury risks may be anticipated (Mortal
danger, risk of injuries).
This symbol signifies that especially hazards
for the machine, material and the environment may
be encountered.
The most important objective of the safety signs exists in
the prevention of personal injuries.
If the warning triangle with the wording “danger” is on a
safety notice, hazards for the machine, material and the
environment are not excluded.
If the warning triangle with the wording “caution” is on a
safety reference, personal injuries are not anticipated.
The applied symbol cannot replace the text of the safety
reference. The text must therefore always be completely
read!
Basic safety measures during normal
operations:
The machine may only be operated by trained and
authorized personnel who know the operating
instructions and are capable of working with them!
Prior to switching the machine on, check and verify that:
Only authorized personnel are located within the
working range of the machine.
No one can be injured when the machine is activated!
Check the machine for visible damages prior to use and
verify that it is only operated in perfect condition! Report
any problems immediately to the supervisor!
Prior to each operating start, check and verify that all
safety equipment operates perfectly!
Basic safety measures during service
and maintenance:
Adhere to the inspection and maintenance intervals
specified in the operating instructions!
Block access to the work area of the machine to
unauthorized personnel prior to performing maintenance
or repairs! Attach or set up a warning sign that points out
maintenance or repair work!
Pull the power plug prior to any maintenance or
repair work or switch off the main switch for the power
supply and secure with a lock, if the power supply is
installed.
The key to this lock must be in the hands of the person
that is completing the maintenance or repair work! Only
use perfect load suspension and lifting equipment when
replacing heavy machine parts!
Properly dispose of environmentally
hazardous lubricants, coolants or cleaning agents!

LAUNCH KWA-300 3D Wheel Aligner
iv
Working on the electrical equipment:
Repairs on electrical equipment of the
machine may only be performed by trained electricians!
Electrical equipment must be routinely inspected!
Re-attach any loose connections!
Immediately replace damaged lines/cables!
Always keep housings of electrical equipment closed!
Access is only permitted for authorized personnel with
key/tools!
Never spray the housing of electrical equipment with a
hose when cleaning!
Observe environmental regulations:
The legal regulations for waste prevention and
proper recycling/disposal must be adhered to for all
operations on and with the machine.
Especially during installation, repair and maintenance
operations, water-polluting materials, such as:
Lubricants and oils - hydraulic oils - coolants.
Solvent-containing cleaning liquids may not pollute the
ground or reach the sewage system!!
These materials must be stored, transported, collected
and disposed of in suitable containers!

LAUNCH KWA-300 3D Wheel Aligner
v
Table of Contents
Introduction...............................................................1-1
Definition...................................................................1-1
When Is WheelAlignment Required.........................1-1
Main VehicleAlignment Parameter...........................1-1
Toe-in and Toe-out..................................................1-1
Steering axle inclination..........................................1-1
Caster.....................................................................1-2
Toe-out onTurns.....................................................1-2
Thrust angle............................................................1-2
Wheelbase Difference.............................................1-3
Track width Difference............................................1-3
Left (right) lateral offset angle....................................3
Axle offset angle.....................................................1-3
Delay angle.............................................................1-3
Included angle ........................................................1-3
Functions and Features............................................1-3
Specification..............................................................1-4
Requirements on Surroundings................................1-4
Working Principle......................................................1-4
Structures..................................................................2-1
Overall Structures.....................................................2-1
Main Unit...................................................................2-1
Cameras and posts...................................................2-1
Wheel Clamps and Targets.......................................2-2
Communication Cables.............................................2-2
Turntable andTransition Bridge................................2-2
Steering Wheel Holder..............................................2-2
Brake Pedal Depressor.............................................2-3
Basic Operation Procedures....................................3-1
Get Vehicle Information.............................................3-1
WheelAlignment Checking.......................................3-1
Adjustment................................................................3-1
Test-drive..................................................................3-1
Operation Instructions.............................................4-1
Preparation...............................................................4-1
Program Operation...................................................4-1
Standard Measurement..........................................4-1
Select Vehicle Model............................................4-1
Rolling Run-out Compensation.............................4-4
Caster Swing........................................................4-4
Rear axle measurement.......................................4-6
Front axle measurement.......................................4-7
Print Report ..........................................................4-9
Quick Measurement..............................................4-10
Additional Measurement.......................................4-10
System Management............................................4-11
User information.................................................4-11
Client management:............................................4-11
OEM Specs ........................................................4-12
Frequent Model...................................................4-13
System Setting....................................................4-13
Report setting.....................................................4-13
Select Language.................................................4-14
Data Backup and Restore...................................4-14
Log Review.........................................................4-14
Target Monitoring................................................4-15
Camera Calibration.............................................4-15
Print.......................................................................4-16
Help.......................................................................4-16
Exit........................................................................4-16
FrequentlyAsked Questions (FAQ).........................5-1
Industrial Computer CannotStart Up, WithoutAny
Prompts.....................................................................5-1
Computer Cannot Enter Windows XP.......................5-1
Mouse and Keyboard does notRespond..................5-1
Printer does not Respond.........................................5-1
KWA-300 3D Program Does Not Run.......................5-1
Why the blocking tip box does not appear when you
turn the steering wheel and block the rear target?....5-1
When you turn the steering wheel, the tip box appears
in case of the light path has been blocked, how to
handle it? ..................................................................5-1
Why does it have obvious difference between left and
right minimum turning radius after alignment?..........5-1
Maintenance..............................................................6-1
Computer..................................................................6-1
Wheel Clamp and Target...........................................6-1
Printer .......................................................................6-1
Posts and Signal Cables...........................................6-1
Turntables.................................................................6-1

LAUNCH KWA-300 3D Wheel Aligner Introduction
1-1
Introduction
Thank you for using KWA-300 3D wheel aligner
manufactured by LAUNCH TECH CO., LTD.
Definition
KWA-300 3D Wheel Aligner is a precision measurement
instrument designed to measure the wheel alignment
parameters and compare them with the specifications
provided by vehicle manufacturer. It also gives
instructions to the user for performing corresponding
adjustments so as to get the best steering performance
and reduce tire wear.
When Is Wheel Alignment
Required
zThe driver must firmly hold the steering wheel to
maintain a straight-ahead driving.
zAbnormal wear of tires occurred, such as single
side wear, concave-convexity wear and
featheriness wear.
zToo heavy or too light steering, or shaking at
high-speed driving.
zWhen the tire(s), steering joint or shock absorber
are replaced.
zWhen the vehicle is impacted.
zAfter the vehicle has run for the first 3000km or
10000km.
Main Vehicle Alignment
Parameter
The wheel alignment mainly consists of camber, caster,
toe-in, steering axle inclination, toe-out on turns,
wheelbase difference, track width difference, etc. They
are designed mainly to improve the steering
performance and driving stability of the vehicle, and
reduce tire wear.
Toe-in and Toe-out
The toe setting is the amount by which the front or rear
wheels point inwards or outwards at the front of the
wheel in relation to each other(see Fig.1.1).
When the wheels point inwards they are said to toe-in,
toe-in figures are given a positive value. Conversely
when the wheels point outwards they are said to be
toe-out and the figures are shown as a negative value.
Fig.1.1
The purpose of correct toe is to ensure that the wheels
run parallel when the vehicle is driving. An incorrect toe
setting may affect the stability and controllability of the
vehicle.
Camber
Camber is the leaning of the wheel inwards or outwards
from the vertical.
If the road wheel leans outwards from the vertical, it is
said to have positive camber and when leaning inwards
from the vertical - negative camber, looking from the
front or rear of the vehicle. See Fig.1.2.
Fig.1.2
Camber is measured in degrees.
Steering axle inclination
Steering axle inclination (SAI) is the angle of inclination
of the king pin towards the centre-line of the vehicle from
the vertical (see Fig.1.3).

LAUNCH KWA-300 3D Wheel Aligner Introduction
1-2
Fig.1.3
Correct steering axle inclination can equalize the loads
applied on bearings so that the life of bearings can be
prolonged and the controllability of steering is improved.
Without the inclination, the controllability of the steering
may be affected; further more, the vehicle weight and
the ground counterforce may cause significant stress in
the axle and finally damage the axle.
Correct inclination of king pin is also helpful for the
vehicle to restore its straight-ahead position after
steering.
Steering axle inclination is determined when the vehicle
suspension is designed. It is not service adjustable.
Caster
Caster is the tilting of the kingpin either forwards or
backwards from vertical, as viewed from side of the
vehicle. See Fig.1.4
Fig.1.4
When the king pin is tilted backwards from the vertical,
caster is positive. When the king pin is tilted forwards,
caster is negative.
Caster angle influences the directional stability of the
steering. To increase the tendency of the steering to
self-centre, the steering will normally be designed with
positive caster.
Toe-out on Turns
Toe-out on turns is defined as the difference of the
steering angle between the two front wheels when
turning left or right by 20°as shown in Figure 1.5. The
inner wheel will turn more degrees than the outer wheel
when the vehicle is steered, the difference is usually
about 2°. This angle is designed to reduce steering
resistance.
Fig.1.5
Note: This angle can be tested when a turntable is
equipped for KWA-300 3D.
Thrust angle
The trust angle is defined according to the driven mode
of vehicle.
zRear wheel driven: the thrust angle equals half of
the toe-in difference between the two rear wheels.
As shown in Fig.1.6.
zFront wheel driven: the thrust angle equals half of
the toe-in difference between the two front wheels.
zFour-wheel driven: the thrust angle equals half of
the toe-in difference between the two front wheels
plus half of the toe-in difference between the two
rear wheels.
The trust angle is defined as positive when the trust line
is towards left, and negative when the line is towards
right.
If the thrust angle is not zero, the vehicle will have the
side-moving trend. In this case, adjust the front toe-in of
the drive wheels first, and then adjust the toe-inof driven
wheels.

LAUNCH KWA-300 3D Wheel Aligner Introduction
1-3
Fig.1.6
Wheelbase Difference
Wheelbase difference is defined as the angle between
the joint line of the centre of two rear wheels and that of
the front wheels. It is positive when distance between
the centre of the right wheels is large than that of left
wheels; and negative otherwise. If the track width is
available from the vehicle specifications, then the
wheelbase difference can be also expressed by angle.
See Fig. 1.7
+
Fig. 1.7
Track width Difference
Track width difference is defined as the angle between
the joint line of the ground-contact point of left wheels
and that of the right wheels. It is positive when distance
between the centre of the rear wheels is large than that
of front wheels; and negative otherwise. If the
wheelbases are available from the vehicle specifications,
then the track width difference can be also expressed by
angle. See Fig. 1.8.
+
Fig. 1.8
Left (right) lateral offset angle
The relative offset in lateral direction between front axle
and rear axle of vehicle is axle offset. When rear wheel
axle is offset to right from the front wheel, the axle offset
is positive, otherwise is negative. The angle between the
bisector of the track width difference angle and the
thrust line is axle offset angle.
Axle offset angle
The relative offset in lateral direction between front and
rear axle of vehicle is axle offset. When LR (RR) wheel
is offset outside from LF (RF) wheel, the left (right)
lateral offset is positive, otherwise is negative. The angle
between the connecting line from the front wheel center
point to the rear wheel center point (same side) and the
thrust line is left (right) lateral offset.
Delay angle
The angle between the connecting line from the LF (LR)
wheel center point to the RF (RR) wheel center point
and the perpendicular of the longitudinal geometry
center line is called front (rear) delay angle. When the
right wheel on the front (rear) axle is behind the left
wheel, the front (rear) delay (angle) is positive,
otherwise is negative.
Included angle
The sum of the SAI (Steering axle inclination) and the
wheel camber is called included angle.
Functions and Features
zComplete test: The KWA-300 3D Wheel Aligner
can be used to measure the most wheel alignment
parameters, such as front wheel toe-in, front
wheel camber, caster, steering axle inclination,
maximal steering angle, thrust angle, toe-out on
turns, rear wheel toe-in, rear wheel camber,
wheelbase difference, track width difference, etc.
zBrand new 3D computer vision measurement:

LAUNCH KWA-300 3D Wheel Aligner Introduction
1-4
automatically test the aligning angles with high
performance camera.
zPositive targets: there are no electronic
components inside the targets, and no cables
between the targets and the main unit, so the
targets are easy to be fastened on the wheel
clamps.
zProvides many kinds of auto test processes and
diagram operating interfaces, very simple and
clear to operate; the whole test process can be
performed automatically, and there are some
humanity tips on the corresponding interfaces.
zComplete databank: wheel alignment data of over
20,000 vehicle models is stored in the system.
User can also add new data tothe databank.
zAutomatically record the history data, easy for
customer measurement.
zProfuse vehicle adjustment animation and HELP
information.
zProvide real-time help with helpsystem.
zProvide the function of data back-up and
restoration, and of software upgrade.
Specification
Item Resolution Test Range
Total toe-in 2′0~±20º
Camber 2′0~±20º
Caster 4′0~±25º
Steering axle inclination 4′0~±25º
Maximal rim size Depending on the size of the
wheel clamp
Notes:
1. The right of changing the design will be reserved by manufacturer;
2. The above accuracy can be confirmed only when the user follows the specified operation procedures.
Requirements on Surroundings
Item Specification
Ambient temperature 0~+50℃
Relative humidity ≤85%
Light requirement No direct strong lights irradiate the target and reflect to the camera
The height difference between the left rail and
right rail of lift <1mm (left to right); <2mm (front to back)
Working Principle
The working framework of KWA-300 3D Wheel Aligner is as shown in Fig.1.9. The whole system is composed of data
collecting system and data processing system.

LAUNCH KWA-300 3D Wheel Aligner Introduction
1-5
Fig.1.9
The data collecting system consists of 4 cameras with
high resolution and 4 targets. The left and right cameras
capture the images on the left and right targets, and
transmit them to the data processing system via the
image collector. The targets are attached on the wheel
rims via wheel clamps. So the geometrical relationships
among 4 wheel rims are calculated according to the
images captured by cameras from the targets and
further to confirm the aligning parameters of the wheels.
The data processing system is the main unit of
KWA-300 3D. It consists of a computer, power supply
system and interfaces. Its function is to execute the
operation commands, process the data and display the
information together with the original data of vehicle
manufacturer. It also gives instructions for making
adjustment to the vehicle and print out corresponding
report.
The wheel aligner compares the measured results with
the original data of vehicle manufacturer and gives
instructions to the user for adjustment, so its databank
should contain enough information. KWA-300 3D Wheel
Aligner databank contains over 20,000 models
alignment data, and user can also add new vehicle
wheel alignment data into the databank when
necessary.
Computer, image collector
Keyboard,
mouse
Printer
Monitor
Left camera
Right camera Right target
Left target

LAUNCH KWA-300 3D Wheel Aligner Structures
2-1
Structures
Overall Structures
KWA-300 3D Wheel Aligner mainly consists of the main
unit, cameras, posts, wheel clamps, targets,
communication cables, mechanical turntables,
steering wheel holder and brake pedal depressor, etc.
Main Unit
The main unit is an operation control platform.It consists
of cabinet, computer group, interface circuit system and
power supply assembly, etc., as shown in Fig.2.1.
The computer group includes computer, monitor,
keyboard, mouse, printer and image collector, etc. The
monitor, mouse and printer are installed inside the upper
compartment of the cabinet. The image collector is
inside the computer and the keyboard is installed on the
keyboard drawer.
The power supply assembly includes power lead, power
socket and the power supply master switch. The power
supply master switch button is installed at the upper part
of the right sideboard of cabinet, and the power supply
socket is at the lower compartment of the cabinet.
Fig.2.1
Cameras and posts
KWA-300 3D wheel aligner includes 4 CCD cameras,
which respectively capture the images from the 4 targets
attached on the vehicle wheels. The cameras are
mounted inside the steel housings as shown in Fig. 2.2.
The accurate calibration for camera has been performed
during first installation, so it is not necessary for user to
calibrate it when using the instrument.
Fig.2.2
The two posts of KWA-300 3D wheel aligner are used
for holding and fastening the CCD cameras and their

LAUNCH KWA-300 3D Wheel Aligner Structures
2-2
signal cables. The two posts are respectively mounted
on the ground with anchor bolts, and the position
relationship between the posts and the cabinet is as
shown in Fig. 2.3.
(Note: During or after using, ensure to prevent the
posts from swaying, otherwise the position of
camera will be changed, influencing the test result).
Fig.2.3
Wheel Clamps and Targets
KWA-300 3D wheel aligner has 4 target-clamp
assemblies, which are monitored by cameras, are the
key components for whole test system. There are some
bull-eye signs for installing the wheel on the targets as
shown in Fig.2.4.
Fig.2.4
Whether the wheel clamps are fastened correctly or not
decides the test result. Turn the adjusting knob to adjust
the span between wheel claws until it is proper, and then
attach the clamp to the wheel rim. Adjust the knob to
make the wheel clamp fixed on wheel rim tightly. Use
the wheel clamp tie to bind the wheel clamp and the
wheel rim together.
The installation of wheel clamp is crucial to the test
result. The claws should be in even contact with the
wheel rim without touching the lead weight.
Avoid hitting during operation. Otherwise, distortion may
be caused and the test resultmay be influenced.
Communication Cables
There are 4 signal cables and 2 power supply cables for
infrared light between the main unit and the cameras of
KWA-300 3D wheel aligner, which should be fixed on the
ground at first installation, and should be protected with
the bushing. Ensure to prevent the liquid from entering
the inside of the cable bushing or to avoid putting the
heavy on it, in order to prevent the bushing from being
damaged.
Turntable and Transition Bridge
KWA-300 3D has two mechanical turntables
(standard configuration, seeFig.2.5).
Fig.2.5 mechanical turntables
The turntables are placed at the front wheel positions of
the vehicle on the lift.
Use the lock pin to lock the turntable before driving the
vehicle on. Pull out the lock pin after the vehicle is
stopped and the front wheels are at the centers of the
turntables. Each turntable is equipped with a transition
bridge, the transition bridge is placed between the
turntable and the lift to ensure the wheel move on the
turntable smoothly.
While testing, try your best to keep the vehicle front
wheels at the centers of the turntables.
Steering Wheel Holder
KWA-300 3D has a steering wheel holder as shown in
Fig.2.6. Use the steering wheel holder to lock the
steering wheel according to the tips on the screen.
Fig.2.6 Steering wheel holder

LAUNCH KWA-300 3D Wheel Aligner Structures
2-3
Brake Pedal Depressor
KWA-300 3D has a brake pedal depressor as shown in
Fig.2.7. It is used to hold the brake pedal down.
Fig.2.7 Brake pedal depressor

LAUNCH KWA-300 3D Wheel Aligner Basic Operation Procedures
3-1
Basic Operation
Procedures
Get Vehicle Information
Ask the owner for vehicle drivability problems,
symptoms, and wheel alignment history, and find out
vehicle information such as make, model and year, etc.
Check each chassis part carefully, including rubber boot,
bearing, rock arm, tripod end, shock absorber, tie rod
end and steering mechanism, for any looseness or wear.
Then check to see if the tire pressure, tire trackwidths of
the left and right wheels arealike.
Wheel Alignment Checking
Perform the wheel alignment checking after the initial
condition is known.
Adjustment
If the measured values are not in accordance with the
specifications given in the databank, the wheel
alignment adjustment shouldbe performed.
Test-drive
After finishing the wheel alignment, test the vehicle to
see if the abnormal conditions are eliminated.
Re-perform the wheel alignment if necessary.

LAUNCH KWA-300 3D Wheel Aligner Operation Instructions
4-1
Operation Instructions
Preparation
1. Ask the owner for vehicle drivability problems and
symptoms, wheel alignment history, and find out
vehicle information such as make, model and
year, etc.
2. Drive the vehicle onto the lift or over the pit,
ensure that the front wheels arecentered with the
turntables; Apply hand brake to ensure human
safety. To prevent the turntable from turning, lock
the turntables with the lock pins before driving the
vehicle; release the lock pins after the vehicle is
placed well.
3. Check each chassis part carefully, include dust
cover, bearing, rock arm, tripod end, shock
absorber, tie rod end and steering mechanism,
for any looseness or wear. Then check to see if
the tire pressure and track widths of the left and
right wheels are alike.
4. Install the wheel clamp-target assembly on the
wheel and turn the knob to lock the wheel clamp.
The claws of the wheel clamp should be fixed on
the external or internal edge of the rim according
to the practical condition. Ensure equal depth for
each claw and avoid attaching it on the distorted
area. Use the safety belt to bind the wheel clamp
to the wheel rim to avoid falling accidentally.
Please see Fig.4.1.
Fig.4.1
5. Insert the power plug of thewheel aligner into the
standard 3-pole power receptacle.
Program Operation
Turn on the power switch, start the computer and enter
the main interface of the measurement program. The
screen displays the main function menu. There are 7
functions available in the main menu: [Standard
measurement], [Quick measurement], [Additional
measurement], [System management], [Print], [Help],
and [Exit]. See Fig.4.2
Fig.4.2
Standard Measurement
Click [Standard Measurement] in the interface as shown
in Fig.4.2. The screen system will enter the standard
measurement interface.
Select Vehicle Model
Before alignment, the standard data of the vehicle model
must be selected first. The interface is as shown in
Fig.4.3:
Fig.4.3
[Next]: To perform the test according to the default
sequence (Select vehicle model →Vehicle-pushing
compensation →Caster swing → Rear axle →
Front axle → Print report ) of the system.
[Navigation column]: To enter into the item you want
to test in spite of the default sequence.
[Commonly used data list]: The vehicle model in the list
can be directly selected to perform the next-step
operation. It is blank when firstly used. Only the vehicle
model data must be added into this list from the
standard database, can the list be used (See [System
Navigation column
Commonly used data list
Quick search
Added from
standard data
Help
Tire parameter
Next

LAUNCH KWA-300 3D Wheel Aligner Operation Instructions
4-2
Management] - [Commonly used data management]).
[Selected from standard data]: If there is no the
vehicle model you want, you can directly search for the
vehicle model you want from the standard database,
and directly perform the next-step operation（This
vehicle model is no longer saved in the commonly used
data list）. If you want to add this vehicle model into the
commonly used data list, it needs to be added from the
interface of [System Management] - [Standard Data
Management]).
[Quick search]: The input box for quick search aiming at
the vehicle model is provided at the bottom of the
interface. Please input the first letter of the vehicle
model to perform the searching operation.
[Tire parameter]: When the unit of toe-in is used in mm
or In (The unit of toe-in can be set in [System
Management] – [System setting]), the diameter of the
present tire must be input.
[Help]: To provide the description of operating method
and note.
Operating procedures:
Select the corresponding vehicle model item in
[Commonly used data list], thenclick [Next].
Note:
1. When the toe of the system uses linear
measure, it is required to enter the vehicle
tire diameter at the right bottom corner on
this interface, otherwise the system cannot
enter the next operating procedure
2. The form currently provided is the same form
with Commonly Used Data Management in
the System Management interface, in the
same way, you can click button to add
the standard data provided by the system
into this form. If you want to add user-defined
data, you need to add it from Standard Data
Management interface of System
Management. The unit of Wheelbase, Front
wheelbase and Rear wheelbase is mm.
Special Measurement:
For different data of vehicle model, some special
measurement methods and operating procedures will
occur:
1. Aiming at some vehicle model of Benz, the system
provides the operations for measuring the standard
data with gradient meter. When the data selected is
of Benz vehicle, the system will pop up a dialogue
box as shown in Fig.4.4.
Fig.4.4
The interface for vehicle level measurement is displayed
in Fig.4.5.
Fig.4.5
Use gradient meter—the special measurement
instrument (optional) to get thelevel values of four
wheels, which are displayed in the editing boxes.Also,
the operator can take the level value scopes displayed
on the top of the editing boxesas the reference, and
manually input the corresponding level values of four
wheels.
[Vehicle Adjustment Help]: It provides the using method
of the gradient meter for Benz vehicle, the operator can
perform the vehicle test and adjustment with the
reference of the operating methods in Help interface as
shown in Fig.4.6.
Fig.4.6
Operating procedures:
Vehicle
adjustment
Help

LAUNCH KWA-300 3D Wheel Aligner Operation Instructions
4-3
According to the prompts on the interface of [Vehicle
adjustment Help], please perform the level
measurement for four suspensions by the way of using
the gradient meter, and then connect the gradient meter
to the computer host, the system will confirm the
standard data of current vehicle model according to
each level value measurementby the gradient meter.
2. When some special vehicle models (such as BMW
3 series) are selected, the screen will pop up an
interface of [Vehicle Counterweight] as shown in
Fig.4.7.
Fig.4.7
According to the requirements on the interface, put the
sandbags with appropriate weight on the vehicle seats
or in the baggage case, and fill the oil tank according to
the requirement. Please click [NEXT] button to perform
the next operation after finishing the previous
procedures.
3. When some special vehicle models (such as BMW
3 series) are selected, the screen will pop up an
interface of [Height Measurement] as shown in
Fig.4.8. This interface provides an operating
platform for ride height measurement system, in
order to check if the ride height meets the design
requirements of OEM.
Fig.4.8
Operating methods:
According to the prompts on the picture at the bottom of
the interface, measure left, right, front and rear ride
height values respectively to see if they are within the
standard range or not. If the height measurement
value(s) is (are) not within the standard range, please
check the vehicle status, and adjust the corresponding
components to keep 4 Height Measurement Values
within the standard range. Click [NEXT] after finished.
4. When some special vehicle models (such as
RENAULT MEGANEⅡ) are selected, the screen
will pop up an interface of [Dependent Suspension
Measurement] as shown in Fig.4.9. This interface
provides an operating platform for dependent
suspension measurement system, in order to
confirm the standard data according to the current
status of the vehicle body.
Fig.4.9
Operating methods:
According to the prompts on the picture at the bottom of
the interface, measure left, right, front and rear ride
height values respectively, and input them into the
corresponding inputting boxes. Click [NEXT] after
finished.
Caution:
1. Testingconditions for ride height measurement
zSpecified tire pressure
zGood and even tread pattern
zSpecified wheel bearing clearance
zSpecified rim and tire
zThe brake pedal depressor is installed
zCounterweight the whole vehicle according to
the normal driving conditions. Adjust the
seats to the middle positions and fill the
gasoline tank full.
2. If the measured values are beyond the tolerance
range, it indicates that the vehicle is faulty, and the
faults must be eliminated before performing the ride
height measurement.
3. For the vehicle with air shock absorbers, please pull
out the security device of the air feeding equipment
to prevent the vehicle from being adjusted up and
down.
4. The sandbags and height measurement meter are
not delivered with the instrument, users should
prepare them by themselves.

LAUNCH KWA-300 3D Wheel Aligner Operation Instructions
4-4
Rolling Run-out Compensation
Rolling run-out compensation is mainly used for getting
the inherent parameters of the targets before the normal
measurement, so as to ensure the measurement more
accurate. You do not always perform this operation. If
the measurement is accurate, the user can directly skip
this step, and start from Caster Swing measurement.
The interface is as shown inFig.4.10:
Fig.4.10
Operating Procedures:
1. Install four wheel clamp targets respectively;
2. Place the transition bridges at the appropriate
positions between the lift and the mechanical
turntables respectively;
3. Turn the front wheels straight ahead, and fasten the
steering wheel with steering wheel holder, and then
remove the brake wheel depressor. Move the
parking wooden chocks back by 30cm away to
ensure the vehicle can move freely within the
distance of 30cm;
4. According to the system operation prompts, please
push the vehicle back slowly until the system
prompts to pull the vehicle back to the original
location.
Caution:
1. It is strongly suggested to select this function
to ensure measuring accuracy;
2. Before performing Rolling run-out
compensation operation, be sure to fix the
steering wheel according to the requirements,
in order to avoid the wheels' swing to left or
right when performing Rolling run-out
compensation operation, causing the unstable
axis;
3. The line of sight of any camera cannot be
blocked during pulling and pushing vehicle;
4. Keep the force for pushing and pulling the
vehicle evenly, keep the measurement platform
level, and keep the vehicle moving smoothly;
5. Basically keep the target surface vertical to the
ground level, otherwise, too large elevation of
the target in motion will be resulted in, causing
the abnormal target image.
6. Please remove the transition bridges away from
the lift after finishing rolling run-out
compensation measurement.
[Red Target Status]
It indicates that the target image captured by camera
does not meet the measurement requirements (It is
usually because of the blocked light).
[Previous]
Return to the previous operation procedures.
[Run-out Compensation afterLifted]
Perform run-out compensation for the vehicle after it is
lifted up. The interface is as shown in Fig.4.11.
Fig.4.11
Operating Procedures:
According to the prompts on the screen, turn the target.
When it is turned by some angle value, the arrow head
on the interface will prompt the operator to turn the
target back. The interface is as shown in Fig.4.12.
Fig.4.12
Caster Swing
Kingpin measurement is aimed at the front wheels,
which includes kingpin inclination and caster. Correct
Kingpin Inclination can equalize the loads applied on
bearings so that the life of bearings can be prolonged
and the controllability of steering is improved. The
existence of kingpin inclination can make the

LAUNCH KWA-300 3D Wheel Aligner Operation Instructions
4-5
intersection point of steering axes and road surface be
in front of the adherent point between tire and the
ground, which can make use of the resistance from the
road surface to the tire to keep the vehicle driven
straight-ahead.The interface is as shown in Fig.4.13.
Fig.4.13
Operation Procedures:
1. Adjust the steering wheel to straight-ahead status,
i.e. when the toe-in of FL wheel is equal to the
toe-in of FR wheel, the small round ball on the
operating interface will move to middle position and
turn green from red.
2. According to the system prompts, turn the steering
wheel right or left by about 20 degrees. After
arriving at the desired position, the small ball turns
green again from red.
3. According to the system prompts, turn the steering
wheel left or right by about 20 degrees. After
arriving at the desired position, the small ball turns
green again from red.
4. After test finished, please center the steering wheel.
The system will automatically return to the next
page to check the measurement result. The
interface is as shown in Fig.4.14.
Fig.4.14
[Measurement for Max. steering angle]: According to the
prompts on the screen, read the data of Max. steering
angles indicated by mechanical turntables for FL and
FR wheels, and input them into the corresponding data
boxes respectively, and then click [Return]. The interface
is as shown in Fig.4.15.
Fig.4.15
[HELP for vehicle adjustment]: Click this button, the
screen will pop up an interface of [HELP for vehicle
adjustment], the different kingpin adjusting methods for
various vehicle models have been enumerated in this
interface for vehicle adjustment, the operator can
perform the kingpin adjustment operation according to
the operating methods in the HELP interface. The
interface is as shown in Fig.4.16
Fig.4.16
[Detailed data]: This interface provides the result outputs
for whole testing operations, which includes the
measured values of each parameter for front and rear
wheels. The interface is as shown in Fig.4.17.
Fig.4.17
HELP for vehicle
ad
j
ustment Detailed data
HELP for vehicle adjustment