CEMB USA C218 -A User Manual

Instructions for use

I

Contents

1 - GENERAL 3

1.1 - GENERAL SAFETY RECOMMENDATIONS 3

1.1.1 - STANDARD SAFETY DEVICES 3

1.2 - FIELD OF APPLICATION 3

1.3 - OVERALL DIMENSIONS 3

1.4 - SPECIFICATION 4

2 - HANDLING AND LIFTING 4

3 - COMMISSIONING 5

3.1 - ELECTRICAL CONNECTION 5

3.2 - PNEUMATIC CONNECTION 5

3.3 - ADAPTER MOUNTING 5

3.4 - WHEEL MOUNTING 5

3.5 - GUARD MOUNTING AND ADJUSTMENT (OPTION) 5

4 - CONTROLS AND COMPONENTS 6

4.1 - AUTOMATIC DISTANCE + DIAMETER GAUGE 6

4.2 - KEYBOARD 6

5 - INDICATIONS AND USE OF THE WHEEL BALANCER 7

5.1 - INITIAL SCREEN 7

5.1.1 - SCREEN-SAVE SCREEN 7

5.2 - MENU ACCESS DIAGRAM 8

5.3 - PRESETTING OF WHEEL DIMENSIONS 9

5.3.1 - AUTOMATIC PRESETTING (SEE ALSO CORRECTION MODE) 9

5.3.1.1 - STANDARD WHEELS 9

5.3.1.2 - WHEELS ALUS 10

5.3.2 - MANUAL PRESETTING 11

5.3.2.1 - STANDARD WHEELS 11

5.3.2.2 - WHEELS ALUS 12

5.4 - USER CONTROL 12

5.4.1 - USER MEMORIZATION 12

5.4.2 - TO CALL USER 12

5.5 - RESULT OF MEASUREMENT 13

5.5.1 - INDICATION OF EXACT CORRECTION WEIGHT POSITION 14

5.5.2 - “SPLIT” CONTROL 15

5.5.3 - UNBALANCE OPTIMIZATION 16

5.5.4 - CORRECTION MODES 16

5.5.5 - AUTOMATIC MINIMIZATION OF STATIC UNBALANCE 17

5.6 - ECCENTRICITY MEASUREMENT (EMS OPTIONAL) 18

6 - SETUP (SEE DIAGRAM SHOWING ACCESS TO THE MENUS) 19

6.1 - LANGUAGE 19

6.2 - UNIT OF UNBALANCE MEASUREMENT 19

6.3 - UNBALANCE DISPLAY THRESHOLD FOR TRUCK/CAR 19

6.4 - UNBALANCE DISPLAY PITCH FOR TRUCK/CAR 19

6.5 - SPIN WITH GUARD CLOSED 19

6.6 - SCREEN-SAVER TIME 19

6.7 - VISUAL ECCENTRICITY CHECK 19

6.8 - ACOUSTIC SIGNAL 19

7 - SPECIAL CALIBRATIONS AND FUNCTIONS (SEE ACCESS DIAGRAM) 20

7.1 - CONTROL OF ECCENTRICITY MEASUREMENT 20

7.2 - PRESETTING THE CUSTOMER AND USER NAME 20

7.3 - CALIBRATIONS 20

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7.3.1- DISTANCE GAUGE CALIBRATION 20

7.3.2 - CALIBRATION OF DIAMETER GAUGE 20

7.3.3 - WHEEL BALANCER CALIBRATION 20

7.3.4 - MACHINE SELF-TEST 21

7.3.4.1 - TO CHECK THE ENCODER 21

8 - ERRORS 22

9 - ROUTINE MAINTENANCE (for non specialized personnel only) 23

9.1 - TO REPLACE THE DRIVING PULLEY 23

9.2 - TO REPLACE THE BRAKE PAD 23

9.3 - TO REPLACE THE FUSES 23

9.4 - MAINTENANCE OF THE PNEUMATIC CIRCUIT 23

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1 - GENERAL

1.1 - General safety recommendations

▪ The balancing machine should only be used by duly authorized and trained personnel.
▪ The balancing machine should not be used for purposes other than those described in the instruction
manual.
▪ Under no way should the balancing machine be modifi ed except for those modifi cations made
explicitly by the manufacturer.
▪ Never remove the safety devices. Any work on the machine should only be carried out by duly
authorized specialist personnel.
▪ Do not use strong jets of compressed air for cleaning.
▪ Use alcohol to clean plastic panels or shelves (AVOID LIQUIDS CONTAINING SOLVENTS).
▪ Before starting the wheel balancing cycle, make sure that the wheel is securely locked on the adapter.
▪ The machine operator should not wear clothes with fl apping edges. Make sure that unauthorized person
nel do not approach the balancing machine during the work cycle.
▪ Avoid placing counterweights or other objects in the base which could impair the correct operation of the
balancing machine.

▪ For TFT monitors, see the specifi c instructions attached.

1.1.1 - Standard safety devices

▪ Low rotation speed.
▪ STOP push button for stopping the wheel under emergency conditions.
▪ The safety guard (option) of high impact plastic is with shape and size designed to prevent risk of
counterweights from fl ying out in any direction except towards the fl oor.
▪ A microswitch prevents starting the machine if the guard is not lowered and stops the wheel
whenever the guard is raised.
▪ Protection system on LIFT control.

1.2 - Field of application

The machine is designed for balancing wheels weighing up to 250 kg. It can be operated within a temperature range
of 0° to + 45°C. EMS option: can measure radial geometric deformity (run-out) with all truck and car wheels (below
13”, measurement precision is reduced).

1.3 - Overall dimensions

1

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1.4 - Specifi cation

Single phase power supply 115 - 230 V 50-60 Hz

Protection class IP 54

Max. power consumption 1,1 Kw

Monitor TFT 15”

Balancing speed 100 r.p.m. for cars - 70 r.p.m. for trucks

Cycle time for wheel 8 to 20 seconds

Balancing accuracy 1 gram for cars / 10 grams for trucks

Position resolution ± 1.4°

Average noise level < 70 dB(A)

Distance rim - machine 0 - 335 mm (400 mm max. presettable)

Rim width setting range 1.5” to 20” or 40 to 510 mm

Diameter setting range 10 to 30” or 265 to 765 mm

Max. wheel weight 250 kg

Max. wheel diameter 1300 mm

Min/max. compressed air pressure 8 to 10 kg/cm

approx. 0.8 to 1MPa

approx. 8 to 10 BAR

approx. 115 to 145 PSI

2

2 - HANDLING AND LIFTING

To lift the machine, lever only on the base where the 3 support points are located. Never, under any circum­stance, apply force to other points such as the spindle, head, or accessory shelf.

Check that the balancing machine touches the fl oor at the three support points. The machine does not require
anchoring to the fl oor for correct operation for wheels up to 160 kg. in weight.
Alternative options: Front wheel translation KIT
Ground securing plate KIT

2

2a

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3 - COMMISSIONING

3.1 - Electrical connection

WARNING: The electrical connection must be made by specialized personnel. Connection to
the single phase mains must be made between phase and neutral, and never, under
any circumstances, between phase and earth (ground). Effi cient earthing
(grounding) is essential for correct machine operation. The manufacturer declines
all responsibility and warranty in the event of incorrect connection.

Before connecting the machine to the mains through relative cable, check that the mains voltage matches the one
shown on the nameplate at the back of the balancing machine. Rating of the electrical connection should be on the
basis of the machine electrical power consumption (see nameplate).

▪ The machine mains supply cable should be fi tted with a plug conforming to current regulations.
▪ It is recommended to provide the machine with its own electrical connection through a slow acting safety switch

rated at 4 A (230 V) or 10 A (115 V).
▪ When connection is made directly to the main control panel without using any plug, it is advisable to padlock the
main switch of the balancing machine in order to limit its use to authorized personnel only.

3.2 - Pneumatic connection

The machine must be connected to the compressed air supply and must not be used if the pressure is below 5 kg/
cm2 (5 bar; 72 PSI; 0.5 MPa). The maximum input pressure is limited to 10 kg/cm2 (~10 Bar; ~145 PSI; ~1 MPa).
The connection is made on the rear of the machine. The air circuit is designed to ensure signifi cant “elasticity” of
movement for the lift whatever the position of its travel; this means that the position of the wheel can be adjusted with
minimal manual effort. The spinning and braking device is calibrated at the factory and cannot be modifi ed.

3.3 - Adapter mounting

3

A

B

The wheel balancer is supplied complete with cone type adapter
for fastening wheels with central bore.
Other optional adapters can be mounted:
a) Remove threaded end piece A after backing
off screw B.
b) Mount the new adapter (see enclosed brochures)

N.B. : Carefully clean the coupling surfaces before
performing any operation.

3.4 - Wheel mounting

The wheels should be fastened with one of the numerous adapters manufactured by CEMB (see enclosed
brochures). N.B.: Incorrect centering inevitably causes unbalance.

3.5 - Guard mounting and adjustment (option)

a) Fasten the components to the base as illustrated in specifi c exploded view.
b)The positions of these guards can be adjusted using the special screws accessed from inside the main support.
c) Check that the microswitch is held down when the guard is closed.
d) Adjust the angular position of microswitch control.

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4 - CONTROLS AND COMPONENTS

4.1 - Automatic distance + diameter gauge

It allows measurement of the distance from the machine and the wheel diameter at the point of application of the
counterweight. It also allows correct positioning of the counterweights inside rim by using the specifi c function (see

INDICATION OF EXACT CORRECTION WEIGHT POSITION) which allows reading, on the monitor, the position used for

the measurement inside the rim (for calibration, see the corresponding paragraph).

The gauge can only be used with the counterweight pincers mounted.

4.2 - Keyboard

FUNCTION KEYS: they immediately select function indicated on the monitor

4

Selection of special
functions

Confi rm

Starts measuring cycle

Interrupts machine cycle

N.B. - Press the buttons with the fi ngers only: never use the counterweight pincers or other pointed
objects.

- When the beep signal is enabled (see section

ACOUSTIC SIGNAL), pressing of any push button

is accompanied by a “beep”.

-

The TFT monitor is NOT the TOUCH SCREEN type.

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5 - INDICATIONS AND USE OF THE WHEEL BALANCER

The monitor shows several information and suggests various alternative ways of use to the operator.
This is done through various “screens”.

5.1 - Initial screen

Buttons enabled

: main functions screen (see

: type of STATIC correction

: balancing spin (see RESULT OF MEASUREMENT)

Dimensions gauge : when extracted, the Dimensions screen is selected (see PRESETTING OF WHEEL DIMENSIONS).
If the machine remains on the initial screen for a certain amount of time without being used, the system is automati­cally switched to a screen-save. Striking of any key, movement of the wheel or distance + diameter gauge will cause
automatic switching from the screen-save menu to the initial screen.

5.1.1 - Screen-save screen

N.B.: Name of the wheel balancer’s owner. Can be preset via the monitor (see section

THE CUSTOMER AND USER NAME).

MENU ACCESS DIAGRAM)

PRESETTING

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5.2 - Menu access diagram

N.B. : - The symbol indicates the presence of a further menu.

- To return to the previous menu, press button

- To return to the initial screen, press button

A

User

control

B

H

C

User control

E

PASSWORD : + + +
RESERVED FOR EXPERT PERSONNEL

D

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5.3 - Presetting of wheel dimensions

5.3.1 - Automatic presetting (see also CORRECTION MODE)

5.3.1.1 - Standard wheels

The screen appears upon removing the distance + diameter gauge.
The “dimension acquired” message is indicated by the correction weight symbol, which changes from blue to red.

Using the special grip, move the end of the gauge against the rim in one of the positions A/B indicated in fi gure 5.

5

Note: Always use the round part of the striker plate.

- Hold the gauge in position for at least 2 seconds.
If the acoustic signal is enabled (see
“beep”.
The calibration performed as such is necessary for modes AL1,2,3,4,CTS,Static, Dynamic.
Manually presetting is possible by using the push buttons as described in

ACOUSTIC SIGNAL), the acquisition of the dimensions is accompanied by a

MANUAL PRESETTING.

N.B. Depending on the preset diameter, the machine is automatically set to truck mode (diameter ³18”
or 450 mm) or car mode. However such selection can be changed at any moment in the
Measurement screen (see section

RESULT OF MEASUREMENT).

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b

Set the distance+diameter gauge to the rest position.
The current width value is displayed inside the tyre.

- Set the nominal width, which is normally shown on the rim, or measure the width “b” with
the caliper gauge provided.

b

The other enabled buttons are:

select the type of weight to apply (see

car/truck selection

select the dimensions presetting in manual mode screen.

return to initial frame.

launch balancing.

5.3.1.2 - Wheels ALUS

After the measurement performed for the FI inner side, as indicated in fi g. 6, pull out the gauge again to store the
data for the FE outer side (fi g. 6a); choose position A or B (fi g. 5) at your choice. Keep this position for at least 2
seconds. The counterweight symbols change colour.
When the acoustic signal is enabled (see

6 6a

ALUS inside I

ACOUSTIC SIGNAL), the acquisition is accompanied by a “beep”.

CORRECTION METHODS)

ALUS outside E

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Position of adhesive weights

5.3.2 - Manual presetting

5.3.2.1 - Standard wheels

If necessary, the dimensions can be inserted or edited in manual mode as follows:

- press

be reached by pulling out the distance + diameter gauge).

- press

- press / to preset the required value.

- press

- press

- press

Defi nition of dimensions:

d = DIAMETER: Preset the nominal diameter stamped on the rim.
b = WIDTH: Preset the nominal width indicated on the rim.
a = DISTANCE: Preset the distance of the inside of the wheel from the machine measured with special gauge as
described in fi g. 7.

+ or else press from the Dimensions screen in automatic mode (which can

to select the dimension to be preset (highlighted in red).

to change unit of measurement.

to switch to the Manual Presetting screen for the ALUS dimensions

to return to the Measurements screen

7

b

a

d

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5.3.2.2 - Wheels ALUS

Preset the dimensions indicated on the screen:

8

14 mm vettura
25 mm autocarro

car
truck

5.4 - USER control

The wheel balancer can be used simultaneously by 4 different users who, through a simple sequence, can memorize
their work condition and call it when needed. The users’ names can be memorized

AND USER NAME).

(PRESETTING THE CUSTOMER

5.4.1 - USER memorization

- Preset the dimensions correctly according to the procedures already described in sections

SETTING and MANUAL PRESETTING.

- Press ; the “MENU” window appears on the monitor.

- Press

- Press the number corresponding to the required USER. The system returns to the initial screen automatically.

5.4.2 - To call USER

- Perform a measuring spin with any dimensions.

- Press button

- Press

- Press the number corresponding to the required USER. The system automatically returns to the initial screen with
recalculation of the unbalance values on the basis of the effective dimensions of the USER called.

; a window appears with the list of available USERS. The current user is displayed in red.

; the “MENU” window appears on the screen.

, a window appears with the list of available USERS. The current user is displayed in red.

N.B. : - The dimensions memorized as USER are lost when the machine is switched off.

- The USER control is also valid for the ALUS dimensions.

- The current USER is always displayed in the Measurements and Dimensions screens.

SEMI-AUTOMATIC PRE-

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5.5 - Result of measurement

Correction on inside

Correction on outside

After performing a balancing spin, the unbalance values are displayed as well as arrows useful for positioning the
point of application of the correction weight. After positioning the wheel, apply the weight in the 12 o’clock position.
When the acoustic beep is enabled (see section

ACOUSTIC SIGNAL), reaching of the correction position is indicated

by a “beep”.
If the unbalance is less than the chosen threshold value, the “OK “ message appears instead of the unbalance value
to indicate, on that particular side, the wheel is in tolerance; the residual unbalance can be displayed by pressing

button

with an accuracy of 0.5 g (0.1 oz).

The following buttons are enabled:

Display of residual unbalance

Selection of STATIC correction mode. When the mode is changed, the unbalance values are recalculated
automatically on the basis of the previous spin

Eccentricity measurement graph (option)

Selection car/truck

Split control for splitting of unbalance over presettable components (
enabled in STATIC or ALU S correction.

Indication of the longitudinal position of the unbalance (

POSITION ) is enabled

INDICATION OF EXACT CORRECTION WEIGHT

For selection of special functions

Balancing spin.

N.B.: If the machine remains on this screen without being used for more than the time preset in the
Setup parameters (6), the screen automatically returns to the screen-save.

“SPLIT” CONTROL). Button only

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5.5.1 - Indication of exact correction weight position

It is advisable use this function in the event of correction of the external side using an adhesive weight placed inside
the rim. Remember to thoroughly clean the application areas.
This function allows cancelling approximations in the mounting of counterweights with consequent reduction of the
residual unbalance.

- Press button

- Pull out the rim distance + diameter gauge in position A, fi gure 5. Approach of the weight to the correction posi-

tion is indicated by a moving coloured arrow [ ].

- When a fi xed arrow [

by turning the tip of the gauge towards the outside, into the position in which touches the wheel. Compensation is

made for the fact that the weight application position is no longer at 12 o’clock (fi g. 11).
When the acoustic signal is enabled (see
a “beep”.

10

from the Measurements screen.

] is reached, rotate the wheel to correction position (FI or FE) and apply the counterweight

ACOUSTIC SIGNAL), the reaching of a fi xed arrow [ ] is accompanied by

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5.5.2 - “SPLIT” control

The SPLIT function is only possible in the case of static unbalance or ALUS on the outside. It serves for concealing
any stick-on unbalance correction weights behind the rim spokes.

To split the unbalance detected in two different positions, proceed as follows :

1. Position static unbalance or ALUS external side in the correction position :

2. Select a spoke close to the 12 o’clock postion to be corrected, more it into the 12 o’clock position and press button

3. Turn the wheel in the rotation direction indicated on the unbalance display, brining the second spoke to the 12

o’clock position and press button

- Turn the wheel in direction of rotation.

- Turn the wheel in reverse direction of rotation.

4. At this point, two indications appear on screen for positioning of the unbalance correction spokes.

5. Position the spokes indicated on screen in the 12 o’clock position and correct with the value displayed.

Any error in this procedure is clearly shown on screen.
Always follow the information provided by the wheel to optimise correction.

Note: when SPLIT is enabled, the icon

.

is shown on the left of the screen.

.

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5.5.3 - Unbalance optimization

The symbol
(10.5 oz) for trucks. The program allows reducing the total unbalance of the wheel by compensating, when possible,
the unbalance of the tyre with that of the rim. It requires two spins with rotation of the tyre on the rim in the second
spin.

Press

5.5.4 - Correction modes

After having performed automatic measurement of the inner side, it is possible to place the correction weights as

required by pressing pushbuttons

is displayed automatically for static unbalance exceeding 30 grams (1.1 oz) for cars or 300 g

+ after a fi rst spin and follow the instructions appearing on the monitor.

and .

To display static unbalance, press the
diameter is always considered).

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button on the measurement screen (for ALUS static, the inner side

!,53

x

g

g

x

°

x

g

g

x

g

g

g

g

x

g

g

x

x

g

g

x

x

g

g

x

Possible types of correction:

Balancing of steel or light alloy rims with application of clip-on weights on the rim edges

The STATIC mode is necessary for motorcycle wheels or when it is not possible to
place the counterweights on both sides of the rim.

Balancing of light alloy rims with application of adhesive weights on the rim shoulders.

Combined balancing: adhesive weight on the outside, clip-on weight

inside.

Combined balancing: clip-on weight outside and adhesive weight inside.

Balancing of alloy rims with hidden application of the adhesive weight on the outside.

Combined balancing: clip-on weight inside and adhesive hiddenweight outside

(Mercedes).

5.5.5 - Automatic minimization of static unbalance

Initial unbalance

ssx

ddx

g

g

5500°

ssx

ddx

g

residual static

Choice with minimum

static residual

g

11g

ssx

ddx

g

residual static

With conventional

wheel balancer

g

44g

phase shift

Possible approximations

ssx

ddx

g

residual static residual static

g

33g

This program is designed to improve the quality
of balancing without any mental effort or loss
of time by the operator. In fact by using the
normal commercially available weights, with
pitch of 5 in every 5 g, and by applying the two
counterweights which a conventional wheel

ssx

ddx

g

g

66g

balancer rounds to the nearest value, there
could be a residual static unbalance of up to
4 g. The damage of such approximation is
emphasized by the fact that static unbalance is
cause of most of disturbances on the vehicle.
This new function, resident in the machine,
automatically indicates the optimum entity of the
weights to be applied by approximating them in
an “intelligent” way according to their position in
order to minimize residual static unbalance.

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5.6 - Eccentricity measurement (ems optional)

The much enlarged fi gures show the outer tyre surface and axis of wheel rotation.

Fig. A shows measurement of the total Peak-to-Peak
eccentricity defi ned as maximum radial deviation of the
tyre surface.

Fig. B shows measurement of the eccentricity of the 1st
harmonic, i.e. the eccentricity of that circle which “reco­pies” the tyre shape, by averaging the local deviations
of the tyre from the round shape.

Obviously the P.P. measurement is normally greater than that of the 1st harmonic. Tyre manufacturers normally
supply two different tolerances for the two eccentricities.

At the end of the balancing spin it is possible to automatically measure the eccentricity of the tyre through the
SONAR sensor installed on the guard. The sensor should be positioned by hand in front of the tyre tread.

GRAPH 1 - (red)

A B

GRAPH 2 - (yellow)

GRAPH 1 : represents the actual Peal-to-Peak eccentricity.
GRAPH 2 : represents the eccentricity of the 1st harmonic. For a wheel to be in optimum conditions, such graph
should approach a straight line.
When the wheel is moved, the on-screen cursor indicates the current value re-phased on the basis of the angle set at
para.

CONTROL OF ECCENTRICITY MEASUREMENT.

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6 - SETUP (see Diagram showing access to the menus)

The Setup screen provides the user with many possibilities required for presetting the machine according to his own
requirements. Such settings remain unaltered even when the machine is switched off.

The following buttons are enabled:

: return to previous window

: return to Measurement screen

from to : for selection of the parameter.

6.1 - Language

This function allows selecting the language to be used for displaying descriptive and diagnostic messages regarding
machine operation.

6.2 - Unit of unbalance measurement

It is possible to select whether to display the unbalance values expressed in grams or ounces.

6.3 - Unbalance display threshold for truck/car

This consists of the unbalance threshold below which the wording “OK” appears on the screen at the end of the spin
instead of the unbalance; the presettable values vary according to the unit of measurement selected.

6.4 - Unbalance display pitch for truck/car

This represents the display pitch of the unbalance and varies according to the unit of measurement selected. The
selection “5 g” (1/4 oz) for cars and of “50 grams” (1.0 oz.) for trucks.enables display of the correction values on
both sides such as to bring the static unbalance to 0 (theoretical). It is recommended to preset this function as
standard use of the machine as it improves the balancing quality. The computer makes a complex calculation which
allows cancelling the residual static unbalance by varying the value and position of the counterweights of fi xed value.

6.5 - Spin with guard closed

When “ON” is selected the automatic start of the spin is enabled upon closing the guard.

6.6 - Screen-saver time

When the machine remains unused for longer than the time preset with this function, the processor automatically
returns to the Initial screen. Preset the time in seconds.

6.7 - Visual eccentricity check

At the end of the spin, when the measured unbalance values reappear on the screen, it is possible to open the guard
for a visual check to see if the wheel is eccentric or not while the wheel is gradually dropping in speed. On the other
hand, if the guard is left closed, the machine completes the normal positioning.

6.8 - Acoustic signal

When “ON” is selected, an acoustic signal (beep) is given in the following cases:

- when any button is pressed;

- when dimensions are acquired in automatic mode

- upon reaching the correct angular weight application position, in the Measurements screen;

- upon reaching the correct weight application distance, in the Position repeat screen.

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WARNING

7 - SPECIAL CALIBRATIONS AND FUNCTIONS (See access diagram)

In order to gain access to the “Reserved Calibrations and functions” it is necessary to enter a password.
Any incorrect operation within the functions described below could impair the operation of the wheel balancing
machine. Unauthorized use will cause cancellation of the warranty on the machine.

7.1 - Control of eccentricity measurement

1. Set to ON/OFF to enable/disenable tyre eccentricity measurement when starting the unbalance measurement

2. Set the phase shift angle between the eccentricity measurement sonar and the unbalance correction point (top

vertical, 12.00 o’clock position)

Recommended values: sonar mounted on the guard = 72°

7.2 - Presetting the customer and user name

The machine can be customized by presetting:
a) The name appearing on the Initial screen (screen-save).
b) The name of 4 different machine users ( USER NAME).
An “ideal” keyboard appears on the monitor with the set of characters available for composition of the wordings. The
Customer’s name consists of three lines, each max. 30 characters.
The USER NAME consists of a wording max. 15 characters.

7.3 - Calibrations

When is pressed from the Special Functions menu, access is gained to the Calibration menu.

7.3.1- Distance gauge calibration

Follow the instructions appearing on the monitor.

7.3.2 - Calibration of diameter gauge

Follow the instructions appearing on the monitor.

7.3.3 - Wheel balancer calibration

For calibration of the machine, proceed as follows:

- Fit a wheel with steel rim. Example: 6” X 14” (± 1”)

- Preset the wheel dimensions with GREAT CARE.

- Follow the instructions appearing on the monitor.

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7.3.4 - Machine self-test

An automatic self-diagnostics cycle is provided for easier trouble shooting. At the end of the self-diagnostics cycle,
several parameters are displayed which are useful for the Technical Service Department in order to identify machine faults.

Returns to previous menu.

7.3.4.1 - To check the encoder

When the spindle is rotated:

- the angular position “POS” should vary from 0 to 128;

- the wording “UP” should appear when rotated clockwise and “DOWN” when rotated in the opposite direction.

Check encoder

Check of the eccentricity
sonar (option): the number
decreases when a surface
is approached to the sonar

In the event of failure or faulty operation of the wheel balancing machine, notify the Technical Service of all the
parameters displayed.

Check for correct
operation of the
distance gauge; the
number increases
when the gauge is

pulled out.

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8 - ERRORS

ERRORS CAUSES CONTROLS

Err. 1 No rotation signal. 1. Verify belt tautness.

Err. 2 Speed too low during detection.

Err. 3 Unbalance too high. 1. Verify wheel dimension settings.

Err. 4 Rotation in opposite direction.

Err. 5 Guard open

Err. 7 / Err. 8 NOVRAM parameter read error 1. Repeat machine calibration

Err. 9 NOVRAM parameter write error. Replace the computer board.

Err. 11 Speed too high error.

Err. 12 Unbalance measuring cycle error. 1. Verify phase pick-up board function.

Err.13 /
Err.14 /
Err.15 /
Err.16 /
Err.17 /
Err.18

Err. 20 The wheel comes to a halt before comple-

During unbalance measurement rotation,
wheel speed is less than 42 rpm.

After pressing [START], the wheel begins
to rotate in the opposite direction (anti­clockwise).

The [START] pushbutton was pressed
without fi rst closing the guard.

During unbalance measurement rotation,
wheel speed is more than 270 rpm.

Unbalance measurement error. 1. Verify phase pick-up board function.

ting positioning correctly.

2. Verify the function of the phase pick-up board and, in particular,
the reset signal.

3. Replace the phase pick-up board.

4. Replace the computer board.

1. Make sure that a vehicle wheel is mounted on the wheel balancer.

2. Verify belt tautness.

3. Verify the function of the phase pick-up board and, in particular,
the reset signal.

4. Replace the computer board.

2. Check detection unit connections.

3. Perform machine calibration.

4. Mount a wheel with more or less known unbalance (less than 100
grammes) and verify the response of the machine.

5. Replace the computer board.

1. Verify the connection of the UP/DOWN – RESET signals on the
phase pick-up board.

1. Reset the error by pressing pushbutton [7]=End.

2. Close the guard.

3. Verify the function of the protection uSwitch.

4. Press the [START] pushbutton.

2. Shut down the machine.

3. Wait for a minimum time of ~ 1 Min.

4. Re-start the machine and verify correct operation.

5. Replace the computer board.

1. Check if there is any damage or dirt on the timing disc.

2. Verify the function of the phase pick-up board and, in particular,
the reset signal.

3. Replace the computer board.

2. Verify correct motor operation.

3. Verify belt tautness.

4. Replace the computer board.

2. Check detection unit connections.

3. Verify machine earth/ground connection.

4. Mount a wheel with more or less known unbalance (less than 100
grammes) and verify the response of the machine.

5. Replace the computer board.

1. Make sure that the wheel to be balanced is at least 10” in diame­ter.

2. Verify the correct setting of wheel dimensions on screen.

3. Verify belt tautness.

4. For wheels less than 12” in diameter wheels: disenable the

eccentricity measurement procedure

I 0568 - 22

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Err.40/
Err.41/
Err.42/
Err.43

Eccentricity graph plotting procedure error. Perform a new eccentricity measurement.

Err.45/
Err.46/
Err.47/
Err.48

Err.50/
Err.51/
Err.52/
Err.53

Eccentricity graph value display readout
error.

Eccentricity graph current value cursor
plotting procedure error.

Perform a new eccentricity measurement.

Perform a new eccentricity measurement.

9 - ROUTINE MAINTENANCE (see exploded drawings) (For non specialized personnel only)

Always disconnect the machine from the mains before carrying out any operation.

9.1 - To replace the driving pulley

The drive pulley is guaranteed by the manufacturer for approximately 20000 runs.
A spare pulley is found inside the base (see photograph).

If necessary, to replace the pulley, proceed as follows:

- Remove the head and the weight holder shelf, taking care not to damage the electric wires

- Remove the retaining screw on the pulley in order to replace it

9.2 - To replace the brake pad

Back-off the two screws fastening the worn brake pad to the motor mounting brake. Securely fi x the new brake pad
by tightening the screws.

9.3 - To replace the fuses

Remove the weight holder shelf to gain access to the power supply board where the 4 fuses are located. If fuses
require replacement, use ones of the same current rating. If the fault persists, contact Technical Service.

9.4 - Maintenance of the pneumatic circuit

It is important to periodically clean the compressed air fi lter.

N.B. DRAIN FREQUENTLY ANY CONDENSATE BUILT UP IN THE FILTER BOWL VIA RELATIVE
VALVE.

NONE OF THE OTHER MACHINE PARTS REQUIRE MAINTENANCE.

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