kwb-402 user`s manual
LAUNCH
User’s Manual (KWB-402)
All rights reserved! No part of this publication may be reproduced and stored in any form (electronic, mechanical,
photocopying, recording or other forms) without obtaining written permission from Shenzhen Launch Tech Co.,
Ltd.(hereinafter refers to as LAUNCH). The manual is special written for the use of this machine of LAUNCH, therefore
we are not responsible for any use of this information as applied to other devices.
Neither LAUNCH nor its affiliates shall be liable for damages, losses, costs, or expenses result from: user or third
party’s personal accident, misuse, or abuse of this unit, or unauthorized modifications, repairs, or alterations 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 other accessories or parts other than
original LAUNCH products or LAUNCH approved products.
Declaration: Other product names used herein are for identification purposes only and the registered trademark
ownership belongs to original companies.
This equipment is intended for use by technical professionals or maintenance personnel.
Registered trademark
is a registered trademark of LAUNCH TECH. CO., LTD. in China and other countries. All other LAUNCH
trademarks, service marks, domain names, logos, and company names referred to in this manual are property rights of
LAUNCH or its affiliates. In countries where any of the LAUNCH trademarks, service marks, domain names, logos and
company names has not been registered, LAUNCH claims its ownership for them. Other trademarks referred to in this
manual
still
belong
to
the
original
registered
company.
You
may
not
use
any trademark, service mark, domain name, logo, or company name of LAUNCH or other companies referred to in this
manual without prior permission from the owners. You may contact LAUNCH by visiting its website at
http://www.cnlaunch.com, or writing to LAUNCH, Xinyang Building, Bagua 4th Road, Shenzhen, Guangdong Province,
P. R. China, if you have any questions.
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LAUNCH
User’s Manual (KWB-402)
Safety Precautions
Warning
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This manual is an integral part of the machine. Please read carefully.
Keep the manual for later use when maintaining the machine.
This machine can only be used for the designated purposes. Never use it for any other purpose.
The manufacturer is not held responsible for the damage incurred by improper use or use other than the
intended purpose.
Precaution
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This equipment must be operated by qualified personnel who have been gone through special training
programs. Any modification or change of application range to this machine may cause direct or indirect
damages to equipment without obtaining permission from manufacturer or not following the instruction of the
manual.
KWB-402 should be installed on the stable ground.
Keep 0.6M distance between the back panel and the wall for good ventilation. Enough room should be left on
both sides of KWB-402 for convenient operation.
Do not put KWB-402 in a place with extreme temperature or moisture, or near the heating system, water tap,
air-humidifier or furnace.
Do not put KWB-402 near the window with sunlight. Protect the unit with a curtain or shield if necessary.
Keep the machine from dust, ammonia, alcohol, thinner or spraying binder.
People who are no operating the machines should be kept away when it is used.
Use appropriate equipment and tools, protective and safety equipment, including work clothes, blinkers,
working boots and so on.
Pay special attention to the safety marks stuck on the machine.
Do not touch or approach the moving parts by hand or body when the machine works.
Do not remove the safety device or keep it from working properly.
When the machine is moved, only exert force on the chassis. Never exert force on the principal shaft under
any condition. Please carry and place it with great care.
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LAUNCH
User’s Manual (KWB-402)
Description of Safety Signs
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Do not exert force
on the hanging
handle to avoid
falling
of
the
machine.
High voltage power!
Danger!
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The wheel protection
must be put down
before
pressing
START button of the
machine to avoid any
injury.
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Do not exert force on
the balance shaft
when the machine is
transported.
LAUNCH
User’s Manual (KWB-402)
The Position of Safety Signs
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Please replace the safety signs if they get blurred or lost.
When one or more safety signs get lost, don’t operate the machine.
The safety signs must be kept within the sight of the operator.
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LAUNCH
User’s Manual (KWB-402)
Table of Contents
Chapter 1 Introduction…………………………………………………………………………..…………….1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
Usage………..………………………………………………..………………………………………………..……..……..1
Features…………………………………………………………………………………………………….………………..1
Working Principle…………………………………………………………………………………………..………...……...1
Background……………………………………………………………………………………………………..……………1
Technical Data………………………………………………………………………………………………………...1
Application Scope…………………………………………………………………………………….………….…………..2
Working Condition………………………………………………………………………….……………………….……….2
Chapter 2 Equipment Structure…...…………………………………………………….……………..….…2
2.1 Main Structure.........……………………………………………………………………………………….……….....……...2
2.2 Power Supply Control Board................................................................. …………………….....................................3
2.3 Control Panel……………………………………………………………………………………………….………..………..4
Chapter 3 Operating Instruction..……………………………………………………………..….…………4
3.1 Switch on the Machine…………………………………………………………………………………………….………...4
3.2 Selection Function.…………………………………………………………………………………………….…………….4
3.3 Wheel Mounting………………………………………………………………………………………..………….………….5
3.4 Inputting Wheel Data……………………………………………………………………………………………….………..6
3.5 Operating Function…………………………………………………………………………………………….……...….....7
Chapter 4 Troubleshooting…………………………………………………….……………………………10
4.1 Error Messages of Self-diagnosis……………………………………………………………………………..….…….....10
4.2 Frequent Errors and Solution……………………………………………………..……………………….…………..…..11
Chapter 5 Maintenance…………………………………………………………………….……….………..12
Chapter 6 Storage and Scrapping………………………………………………………………………....12
6.1 Storage………………………………………………………………………………………………………….…………...12
6.2 Scrapping….………………………………………………………………………………………………….……………..12
KWB-402 Circuit Diagram…………………………………………………………………………….……..13
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LAUNCH
User’s Manual (KWB-402)
Chapter 1 Introduction
1.1 Usage
The KWB-402 wheel balancer features compact size, good design, simple operation, strong functions and high
measurement precision, which make it ideal equipment for measuring the dynamic balance of the wheel. It can be
used for balancing small and medium size tyres. It can also be a great help in car repair garage and tyre shops.
1.2 Features
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High aptitude, good stability, and high equilibrating precision.
The design allows you to operate from several directions; smart outline makes both eyes and minds pleased.
Advanced built-in driving system highly increases the measuring accuracy.
Standard computation and calibration function eliminate the measurement deviation and ensure the test
accuracy.
Different balance modes are available to various wheels.
Quick and accurate test may reduce your working intensity and improve your working efficiency.
Simple operation and easy grasp
Extra-large digital display
1.3 Working Principle
Only when CPU performs self-test and displays normal information of all units can the user start the balancing
operation. CPU controls the running of principal shaft via driving interface during balancing operation. The imbalanced
signal detected by the balance sensor is transmitted to CPU interface through A/D converter. CPU analyzes
comprehensively both the imbalance signal and the angle signal of principal shaft, calculates the imbalance value, and
then displays the result through LED unit. Man-machine dialogue can be realized through the keyboard and LED unit.
1.4 Background
The imbalance of the wheel causes wobble of the steering wheel, low adhesion, and wheel jumping, which damages
the wheel and shocks absorber and turning parts. It also influences the comfort of steering stability and increases fuel
consumption, decreasing economic index of the automobile directly. Balancing operation will eliminate these
disadvantages and relative loss.
1.5 Technical Data
Sizes
Max Height: 1650mm(65”)
Length: 1150mm(45”)
Width: 1100mm(43”)
Electrical Parameters
Motor (Optional)
Voltage: Motors with different voltages for
customer choice.
AC110V(±5%)
60Hz(±1Hz)
Or AC220V(±5%)
50Hz(±1Hz)
Or AC230V(±5%)
60Hz(±1Hz)
Motor Power:0.18kW
Average Rotate Speed:240r/min
Noise
Working noise: <70dB(A)
Measure Index
Balance Cycle:7s
Balance Accuracy :±1g
Weight
Net Weight: 108 kg(238 Ib)
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LAUNCH
User’s Manual (KWB-402)
1.6 Application Scope
Max Wheel Diameter:610mm(24″)
Max Wheel Width: 508mm(24″)
Max Wheel Weight: 65kg
Rim Diameter: 10″~23″
Rim Width: 1.5″~20″
1.7 Working Condition
Working Temperature: 0℃-50℃
Transport/store temperature: 0℃-55℃
Relative Humidity: ≤85%
Altitude: less than 1000m
Chapter 2 Equipment Structure
2.1 Main Structure
KWB-402wheel balancer structure is shown as in fig1
Wheel protection
1. Measure scale — For automatic measurement
of the installation distance of the wheel (wheel
distance in short) and rim diameter, and the
accurate position of the sticking balance block.
2. Control panel — For man-machine dialogue.
3. Hanging handle-- For hanging cones and the
wheel width scale
4. Counterweight groove — For putting the
counterweight.
5. Balance shaft — For supporting the wheel.
Control
panel
Counterweight
groove
Balance
shaft
Hanging
handle
Accessories supplied with the machine are showed in Fig 2
No.
Description
Amount
001
002
003
004
005
006
007
Shaft positioning cone
Guide screw
Spring
Locking wing nut assembly
Width measure scale
Standard lead weight
Pliers to attach the balance weight
4
1
1
1
1
1
1
008
Hanging handle
3
009
Wheel protection
1
Standardized elements of balancer are shown in the following figure.
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Measure scale
Fig 1
LAUNCH
User’s Manual (KWB-402)
Standardized elements of KWB-402 wheel dynamic balancer
001
002
005
003
004
006
008
007
009
Fig. 2
2.2 Power Supply Control Board
The position of fuse on power supply control
board of the KWB-402 is shown as Fig.3.
The parameters of the two fuses F1 and F2
F1
are:
F1:2A,φ5×20mm,250VAC;
F2
F2:7A,φ5×20mm,250VAC。
两处保险
Fig.3
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LAUNCH
User’s Manual (KWB-402)
2.3 Control Panel
The control panel of KWB-402 is as shown in Fig. 4
3
。
1. Display for inner side wheel
2. Display for outer side wheel
3. Indicating for inner side balance point
4. Indicating for outer side balance point
5. Indicator for functions and status
6. Wheel distance button
7. Rim width button
8. Rim diameter button
9. Balance mode selection
10. Reset and debugging key
11. High accuracy balance key
12. Emergency stop button
13. Start button
4
2
1
8
9
10
13
Fig 4
11
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Chapter 3 Operating Instruction
Attention:
The equipment can only be operated by qualified personnel with special training. Use appropriate tools,
protective and safety equipment, wearing protective work clothes, such as blinkers, and working boots.
3.1 Switch on the Machine
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Turn on the power supply switch on the left side of the machine (Fig. 5). The display for
inner side wheel on the control panel shows “801”. Soon, it changes to “A” and “8.0”. After
the self-checking, the machine enters the Dynamic Balance status that is the default
setting.
Fig.5
3.2 Selection Function
Press[F] key to select required balance modes.
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When this indicator light illuminates (Fig. 6), the machine is on function of static balance,
suitable for motorcycle wheel or wheels that the balance weight cannot be attached on.
Fig.6
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LAUNCH
User’s Manual (KWB-402)
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When this indicator light illuminates (Fig. 7), this function is suitable for the alloyed wheel
that the balance weight can be stuck on its shoulders.
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When this indicator light illuminates (Fig.8), this function is suitable for the alloyed wheel
that the balance weight can be stuck on outer side concealment.
Fig.7
Fig8
l When this indicator light illuminates (Fig. 9), the balance weight can be stuck on the inner
side of the rim or be clipped on the outer side of the rim.
Fig 9
l When all the four indicators are off, it is on the standard balance mode which is default
setting by the computer when turning on the machine.
3.3 Wheel Mounting
Attention:
Ø
Ø
Ø
The max weight of the wheel cannot exceed 75kg.
Remove any counterweight and other foreign body from the wheel before mounting it avoiding any
danger. When remove the counterweight, the demounting/mounting pliers supplied with the machine
should be used (Fig. 10).
Clean the contact surfaces between the shaft and the conical casing with alcohol or gasoline before
mounting the wheel to avoid any influences on installation accuracy.
Fig. 10
Fig. 11
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LAUNCH
User’s Manual (KWB-402)
Mounting Method 1
It is suitable for the wheel that can be positioned with its center hole.
l Fit the wheel onto the balance shaft close up the flange(Fig.11).
l Select a right size conical casing, and then tighten the wheel with a locking wing nut.
Mount
wheel
Fit
conical
casing
Locking
wing nut
Mounting Method 2
This method is suitable for the wheel to be positioned with its central hole, especially when the central position surface
cannot be correctly positioned due to deformation.
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Fit a conical spring, then select a right size conical casing and fit it onto the balance shaft in reverse. See Fig.12.
Fig. 12
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Fit a matching end cap (optional) onto the locking wing nut.
Fit the wheel onto the conical casing and fasten it with a end cap and a locking wing nut.
Fit conical spring
(big end inward)
Fit the
wheel
Fit
conical
casing
End
cap
Locking
wing nut
3.4 Inputting Wheel Data
It is important for operator to know how to input data correctly because the wrong data input may directly influence the
test result of next step.
l A value Input: Pull out the measure
scale into contact with the inside
wall of the wheel rim, check the
relative value (Fig. 13). Press [+]
and [-] buttons next to A button to
input the measured value until the
correct number is shown. [+] to
raise; [-] to lower Thus, the left
display shows “A”.
A value
Fig. 13
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LAUNCH
User’s Manual (KWB-402)
Fig.14
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L value input. Use the width scale that is an accessory to measure width of the rim (Fig. 14). Press [+] and [-]
buttons next to L button until the correct number is shown. Thus, the left display shows “L”.
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D value Input. Find and read the diameter, “d” value, on the tyre. Press [+] and [-] buttons next to D button until
the correct number is shown Thus, the left display shows “D”.
Attention:
When inputting wheel data, wheel width and wheel diameter is in English system under default state of
balancer. By simultaneously pressing [STOP] button and [-] beside corresponding value, it will be converted
into metric system. Then press [STOP] and [+] beside corresponding value, it will be restored to English
system.
3.5 Operating Function
Attention:
Ø
Ø
Ø
Make sure to put down the wheel protection before pressing [START] for safety operation.
Do not raise the wheel protection when the wheel is rotating. If abnormal situation occurs, press [STOP]
first, then turn off the power. Don’t raise wheel cover until the wheel stops.
Do not touch the machine during a wheel spin. Otherwise, the balance effect will be influenced.(fig.14)
Mount the wheel, select the balance mode and confirm that value A, L and D are correct. Do
balance operation as follows:
1. Put down the wheel protection and press [START] key to carry out a wheel spin (fig.15). Seven seconds later, the
machine stops automatically.
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User’s Manual (KWB-402)
Attention:
Ø This step can also be operated like this: put down the wheel protection to start a wheel spin
automatically, then keep pressing [STOP] and [R] for 3 seconds.
Fig 15
2. Display imbalance value. When the machine stops, the numbers showed on the displays are imbalanced values
(the machine default unit is gram, it can be converted to ounce according to customer’s requirement. This can be
realized by simultaneously press [STOP] and [+] , [-] beside A). The left display shows the imbalanced value on the
inner side of the wheel while the right one shows the imbalanced value on the outer side of the rim. (For static balance,
only the right display shows the imbalanced value).
3. Rotate the wheel by hand, and the position indicators flash continuously. When all indicators in one group illuminate,
the 12 o’clock position of the rim is the imbalanced point (Fig. 16). The left position indicators are corresponding with
the inner side of the rim while the right position indicators are for the outer side.
Fig.16
4. Attach the relative counterweight according to the displayed value on the imbalanced point of the rim. The mounting
methods are as follows. Fig. 17 shows how to attach pothook-style balance weight, and the Fig. 18 shows how to
attach stick-on balance weight.
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User’s Manual (KWB-402)
Fig.17
Fig.18
5. Repeat above steps until that “00” is showed on both displays.
6. Remove the wheel from the balance shaft and the operation is over.
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LAUNCH
User’s Manual (KWB-402)
Chapter 4 Troubleshooting
4.1 Error Messages of Self-diagnosis
Error messages of self-diagnosis are showed below.
Failures of the phase generator or the power supply board.
Low rotating speed or no wheel mounted on the machine (with
tyre)
The imbalance value is too big. Change another wheel to test.
Errors with power supply or position sensor
The wheel protection is not put down.
Damages of the memory or losses of the signal
Wrong calibration program or damages of the computer board or
the sensor
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User’s Manual (KWB-402)
4.2 Frequent Errors and Solution
Phenomenon
Cause
Solution
No display when turn on the 1.
machine.
2.
Check whether the outer power 1.
supply is normal.
2.
Failures of the computer board
Check the outer power supply.
Replace the computer board.
Normal display but failures of 1.
[START] button, and A, L and 2.
D inputting keys.
Touch switches are not sensitive.
Machine dies.
2.
Open the cover and insert the pins
of touch switches tightly.
Restart the machine.
Normal display but unable to 1.
stop after start, with wrong
imbalance value.
2.
Loose connection between the 1.
computer board and the power
supply board.
Failures of the computer board
2.
Tighten the connection between
the computer board and the power
supply.
Replace the computer board.
1.
Slow start, bad brake, and The driving belt becomes loose.
inaccurate imbalanced value
Replace the driving belt or adjust
tension of the V belt.
Normal work but with 1.
inaccurate imbalance value
2.
3.
1.
4.
5.
6.
7.
Calibrated value changes.
The body is not stable.
Influences of cones or locking wing
nuts.
The wheel is not mounted tightly.
Unstable power supply.
Big fluctuation of power voltage.
Failures of the phase generator and
its circuit.
2.
3.
4.
Re-calibrate it according to the
User’s manual.
Solve failures according to check
result.
If the failure still exists, replace the
computer board.
Re-fasten locking wing nuts.
Attention:
If the problems can not be fixed through above solutions, please contact the technical support.
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LAUNCH
User’s Manual (KWB-402)
Chapter 5 Maintenance
Attention:
Only the specialized technician can do the maintenance. Before any maintenance is performed, disconnect
the power and keep the plug within the sight of the maintenance personnel.
To keep the wheel balancer in good condition and to prolong its work life, it is necessary to do regular maintenance
according to the instructions of this manual. Otherwise, the normal operation and reliability of the machine will be
influenced, or personal injury would be caused.
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Keep the machine and working area clean, prevent dust entering the moving parts.
Keep the balance shaft clean (clean with diesel oil or alcohol) and lubricated.
Regularly calibrate the machine. See Installation and Parts Manual for details.
Regularly check and adjust the tension of the belt.
Check all connecting parts and bolts regularly and tighten them if necessary.
Chapter 6 Storage and Scrapping
6.1 Storage
When the equipment needs to be stored for a long extended period of time:
l Disconnect the power.
l Lubricate all the parts that need to be lubricated: main shaft and etc.
l Protect the machine with plastic cover against dust.
6.2 Scrapping
When the equipment can no longer be used, disconnect the power and dispose it in accordance with the local law and
regulations.
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User’s Manual (KWB-402)
KWB-402 Circuit Diagram
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LAUNCH
User’s Manual (KWB-402)
Warranty
THIS WARRANTY IS EXPRESSLY LIMITED TO PERSONS WHO PURCHASE LAUNCH
PRODUCTS FOR PURPOSES OF RESALE OR USE IN THE ORDINARY COURSE OF THE
BUYER’S BUSINESS.
LAUNCH products is warranted against defects in materials and workmanship for one year (12 months) from date of
delivery to the user. This warranty does not cover any part that has been abused, altered, used for a purpose other
than for which it was intended, or used in a manner inconsistent with instructions regarding use. The exclusive remedy
for any automotive meter found to be defective is repair or replacement, and LAUNCH shall not be liable for any
consequential or incidental damages. Final determination of defects shall be made by LAUNCH in accordance with
procedures established by LAUNCH. No agent, employee, or representative of LAUNCH has any authority to bind
LAUNCH to any affirmation, representation, or warranty concerning LAUNCH products.
Declaration
The above warranty is able to replace any warranty in other forms.
Order Information
Replaceable and optional parts can be ordered directly from your LAUNCH authorized supplier. Your order should
include the following information:
1. Quantity
2. Part code
3. Item description
Customer Service
If you have any questions on the operation of the machine, please contact us:
Tel: 86-755-82401306 or 86-755-82269604
If your machine requires repair service, return it to the manufacturer with the sales invoice, the warranty sheet, the
quality certificate and a note describing the problem. If the machine is determined to be in warranty, LAUNCH will
repair or replace at no charge, also repay the transport fee to the customer. If the machine is determined to be out
of warranty, it will be repaired for a nominal service charge plus return freight. Our address is as follows:
Attn: Overseas Department
LAUNCH TECH. CO., LTD.
Xinyang Building, Bagua 4th Road,
Shenzhen, Guangdong Province,
P. R. China
P.C.: 518029
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