4 - Hofmann Megaplan

0121- 1
HofmannIndustrial GmbH
A - 5302 Henndorf
Hauptstraße 59
Tel +43-6214-6466-12 \ Fax -22
7 7
ELECTRONIC WHEEL BALANCER WITH
MICROPROCESSOR AND THREE-DIMENSIONAL
GRAPHICS MONITOR, FOR CARS, COMMERCIAL
VEHICLES AND MOTORCYCLES
0121 - 2000.11
( Series B ) ( Series B )
Operating instruction manual
10
6
8-42
5
9-42
4
7
2
3
3-BP
1
1-BP
1 SHAFT ASSEMBLY
1-BP PNEUMATIC SHAFT ASSEMBLY
2 MOTOR + POSITION PICK-UP +
PIEZO TRANSDUCER
3 BRAKE
3-BP BRAKE + BP PEDAL
4 CASING
5 CASING
6 "DISTANCE + DIAMETER"
AUTOMATIC GAUGE
7 POWER UNIT
8-42 42" WHEEL GUARD
9-42 Option "WIDTH 42"
AUTOMATIC GAUGE
10 EMS SONAR Option

2 - 0121
CONTENTS
page
1 - GENERAL .................................................................................................................................................................................... 5
1.1 - GENERAL SAFETY RECOMMENDATIONS ................................................................................................................ 5
1.1.1 - STANDARD SAFETY DEVICES ............................................................................................................................... 5
1.2 - FIELD OF APPLICATION ............................................................................................................................................. 5
1.3 - OVERALL DIMENSIONS ............................................................................................................................................. 5
1.4 - SPECIFICATION ........................................................................................................................................................... 6
2 - HANDLING AND HOISTING ........................................................................................................................................................ 6
3 - COMMISSIONING ....................................................................................................................................................................... 7
3.1 - ANCHORING ................................................................................................................................................................ 7
3.2 - ELECTRICAL CONNECTION ........................................................................................................................................ 7
3.3 - PNEUMATIC CONNECTION (Version P) ...................................................................................................................... 7
3.4 - EXTRA SAFETY DEVICES (VERSION P) .................................................................................................................. 7
3.5 - ADAPTER MOUNTING ................................................................................................................................................. 7
3.6 - GUARD MOUNTING AND ADJUSTMENT ..................................................................................................................... 7
3.7 - SPACER WD ................................................................................................................................................................ 8
4 - CONTROLS AND COMPONENTS ............................................................................................................................................. 8
4.1 - BRAKE PEDAL ............................................................................................................................................................ 8
4.2 - PNEUMATIC LOCKING PEDAL (Version P) ................................................................................................................. 8
4.3- AUTOMATIC DISTANCE AND DIAMETER GAUGE ....................................................................................................... 8
4.4 - AUTOMATIC WIDTH GAUGE (OPTION) ...................................................................................................................... 9
4.5 - AUTOMATIC WHEEL POSITIONING ............................................................................................................................. 9
4.6 - CLOCK CONTROL ....................................................................................................................................................... 9
4.7 - KEYBOARD ................................................................................................................................................................. 9
5 - INDICATIONS AND USE OF THE WHEEL BALANCER ........................................................................................................... 10
5.1 - INITIAL SCREEN ......................................................................................................................................................... 10
5.1.2 - SCREEN-SAVE SCREEN ........................................................................................................................................ 10
5.2 - MENU ACCESS DIAGRAM ....................................................................................................................................... 11
5.3 - PRESETTING OF WHEEL DIMENSIONS ..................................................................................................................... 12
5.3.1 - AUTOMATIC PRESETTING ..................................................................................................................................... 12
5.3.2 - TO CALL MEMORIZED MEASUREMENTS .............................................................................................................. 14
5.3.3 - MANUAL PRESETTING (Use only in special cases or for checking) .................................................................. 15
5.4 - USER CONTROL ........................................................................................................................................................ 18
5.4.1 - USER MEMORIZATION ........................................................................................................................................... 18
5.4.2 - TO CALL USER ...................................................................................................................................................... 18
5.5 - RESULT OF MEASUREMENT ..................................................................................................................................... 19
5.5.1 - INDICATION OF EXACT CORRECTION WEIGHT POSITION ................................................................................... 20
5.5.2 - "SPLIT" CONTROL .................................................................................................................................................. 21
5.5.3 - UNBALANCE OPTIMIZATION ................................................................................................................................. 22
5.5.4 - ALU AND STATIC MODES ..................................................................................................................................... 22
5.5.5 - TO CANCEL STATIC UNBALANCE ........................................................................................................................ 23
5.6 - STATISTICS ............................................................................................................................................................... 24
5.7 - ECCENTRICITY MEASUREMENT (OPTIONAL) .......................................................................................................... 24
6 - SETUP ....................................................................................................................................................................................... 25
6.1 - LANGUAGE ............................................................................................................................................................... 25
6.2 - UNIT OF UNBALANCE MEASUREMENT .................................................................................................................... 25
6.3 - UNBALANCE DISPLAY THRESHOLD ....................................................................................................................... 25
6.4 - UNBALANCE DISPLAY PITCH ................................................................................................................................... 25
6.5 - SPIN WITH GUARD CLOSED ..................................................................................................................................... 25
6.6 - SCREEN-SAVER TIME ............................................................................................................................................... 25
6.7 - VISUAL ECCENTRICITY CHECK ................................................................................................................................ 25
6.8 - ACOUSTIC SIGNAL ................................................................................................................................................... 25
6.9 - CLOCK SETTING ....................................................................................................................................................... 25
FOR SPECIALIZED PERSONNEL ONLY
7 - SPECIAL CALIBRATIONS AND FUNCTIONS ......................................................................................................................... 26
7.1 - ENABLING OF WIDTH MEASUREMENT ..................................................................................................................... 26
7.2 - PRESETTING THE CUSTOMER AND USER NAME ..................................................................................................... 26
7.3 - ENABLING OF ECCENTRICITY MEASUREMENT ....................................................................................................... 26
7.4 - CALIBRATIONS ......................................................................................................................................................... 26
7.4.1 - GAUGE CALIBRATION ........................................................................................................................................... 26
7.4.2 - ADAPTER ECCENTRICITY CORRECTION ............................................................................................................... 27
7.4.3 - WHEEL BALANCER CALIBRATION ....................................................................................................................... 27
7.4.4 - MACHINE SELF-TEST ............................................................................................................................................. 27
7.4.4.1 - TO CHECK THE ENCODER .................................................................................................................................. 27
8 - ERRORS .................................................................................................................................................................................... 28
9 - ROUTINE MAINTENANCE ........................................................................................................................................................ 29
9.1 - SCHEDULED MAINTENANCE ..................................................................................................................................... 29
9.2 - TO REPLACE THE FUSES ......................................................................................................................................... 29
9.3 - ADAPTER END-PIECE, SPINDLE P ............................................................................................................................. 29
- EXPLODED DRAWINGS OF WHEEL BALANCER
- DECLARATION OF CONFORMITY CE

0121- 3

4 - 0121

0121- 5
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 modified except for those modifications 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 flapping edges. Make sure that unauthorized
personnel 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.
1.1.1 - STANDARD SAFETY DEVICES
- STOP push button for stopping the wheel under emergency conditions.
- The safety guard of high impact plastic is with shape and size designed to prevent risk of
counterweights from flying out in any direction except towards the floor.
- A microswitch prevents starting the machine if the guard is not lowered and stops the wheel whenever
the guard is raised.
1.2 - FIELD OF APPLICATION
The machine is designed for balancing car or motorcycle wheels weighing less than 65 kg.
It can be operated within a temperature range of 0° to +45°C.
It is also possible to measure the geometric radial run-out of the wheels (option).
1.3 - OVERALL DIMENSIONS
Fig. 1

6 - 0121
1.4 - SPECIFICATION
Weight with guard (excluding adapter) ........... 138 kg version 700 standard
..................................................................... 159 kg version 700P pneumatic locking
Single phase power supply ........................... 115 - 230 V 50-60 Hz
Protection class ............................................ IP 54
Max. power consumption .............................. 1100 W
Monitor .......................................................... SVGA 15"
Balancing speed ........................................... approx. 180 r.p.m.
Cycle time for average wheel (14 kg) ............ 6 seconds
Balancing accuracy ...................................... 1 gram
Position resolution ......................................... ± 1.4°
Average noise level ....................................... < 70 dB(A)
Distance rim - machine ................................. 0 - 285 mm
Rim width setting range ................................. 1.5" to 20" or 40 to 510 mm
Diameter setting range .................................. 10 to 24" or 265 to 615 mm
Total wheel diameter within guard ................. 1067 mm (42")
Total wheel width within guard ....................... 500 mm
Max. wheel weight ......................................... 65 kg
Min/max. compressed air pressure ............... 7 to 10 kg/cm 2
approx. 0.7 to 1MPa
approx. 7 to 10 BAR
approx. 100 to 145PSI
2 - HANDLING AND HOISTING
N.B. DO NOT HOIST THE MACHINE USING OTHER LIFTING POINTS
Fig. 2
Fig. 3

0121- 7
3 - COMMISSIONING
3.1 - ANCHORING
The machine can be operated on any flat non-resilient floor.
Make sure that the machine rests solely on the three support points provided (fig. 3).
If possible, it is advisable to anchor to the floor using relative mounting feet (see fig. 3)
3.2 - ELECTRICAL CONNECTION
The machine is supplied with a single phase mains cable plus earth (ground).
The supply voltage (and mains frequency) is given on the machine nameplate. It may not be changed.
Connection to the mains should always be made by expert personnel.
The machine should not be started up without proper earth (ground) connection.
Connection to the mains should be through a slow acting safety switch rated at 4A amp (230V) or 10A amp
(115V) .
3.3 - PNEUMATIC CONNECTION (Version P)
For operation of the spindle with pneumatic locking (constant thrust air springs), connect the balancing
machine to the compressed air main: relative connection fitting is located at the rear of the machine. At
least 7 kg/cm 2 (approx. 0.7 MPa; approx. 7 BAR; approx. 100 PSI) is required for correct operation of the
unlocking device.
3.4 - EXTRA SAFETY DEVICES (VERSION P)
- Wheel always locked even when there is pressure failure during the balancing cycle.
- Rotary block wheel retainer which, in the event of accidental pressing of the pneumatic locking
pedal during the balancing cycle, avoids risk of the wheel slipping from the adapter.
Always actuate the unlocking control pedal with the machine stationary in order to avoid stress
and abnormal wear on the adapter.
3.5 - ADAPTER MOUNTING
The balancing machine is supplied complete with cone adapter for fastening wheels with central bore.
Other optional adapters can be mounted:
Fig. 4
A
B
Fig. 4A
A
B
Standard
a) Back-off screw B and remove threaded end-piece A.
b) Fit the new adapter.
Pneumatic spindle a)
Unscrew rod B.
b) Unscrew end-piece A.
c) Fit the new adapter.
Fully unscrew rod B to remove
the wheel, in the event of a
pressure break.
3.6 - GUARD MOUNTING AND ADJUSTMENT
a) Fasten the components to the base as illustrated in specific exploded drawing .
b) The position of the wheel guard when closed can be adjusted with relative screw accessible at the back.
Correct position is the one shown in fig. 1.
c) Check that the microswitch is held down when the guard is closed.
d) Adjust the angular position of microswitch control.

8 - 0121
3.7 - SPACER WD (option)
When balancing very wide wheels (9”), the tyre
may touch the casing of the balancing machine.
Also it might not be possible, to position the
gauge into the rim. To enlarge the distance of
the rim, you should use the option WD/DC. Fit
spacer WD on the adapter body, and secure it
with the standard issue nuts. When centring the
wheel with the cone on the inside, fit the other
cone as a spacer to obtain spring thrust.
Spring
SPACER WD
Spacer cone
Centering cone
4 - CONTROLS AND COMPONENTS
Fig. 5
4.1 - BRAKE PEDAL
This pedal allows the operator to hold the
wheel when fitting the counterweights. It
must not be actuated during the
measuring cycle.
Fig. 6
4.2 - PNEUMATIC LOCKING
PEDAL (Version P)
This pedal allows releasing the device
fastening the wheel on the adapter. Do
not actuate this pedal during the
machine cycle and/or when adapters
other than the standard cone adapter
are mounted.
The pedal has two fixed positions:
UP to release, DOWN to clamp the
wheel.
4.3- AUTOMATIC DISTANCE AND DIAMETER GAUGE
This gauge allows measurement of the distance of the wheel 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 specific function (see 5.5.1)
which allows reading, on the monitor, the position used for the measurement inside the rim (For calibration,
see 7.4.1).

0121- 9
4.4 - AUTOMATIC WIDTH GAUGE (OPTION)
This gauge allows measuring the rim of the wheel to be balanced in the point of application of the
counterweight (see 5.3.1).
4.5 - AUTOMATIC WHEEL POSITIONING
At the end of the spin, the wheel is positioned according to the unbalance on the outside or else according
to the static unbalance (when selected).
Accuracy is ±20 degrees.
4.6 - CLOCK CONTROL
The balancing machine is provided with a clock whose back-up time, when the machine is switched off, is
approx. 1 month. If the machine lies idle for a long period, when re-switching on for the first time, check the
time and reset it if necessary (see 6.9).
4.7 - KEYBOARD
Fig. 7
FUNCTION KEYS: they immediately select function indicated on the
monitor
Selection of special
functions
Confirm
Starts
measuring
cycle
Interrupts
machine cycle
NB:
- Press the buttons with the fingers only: never use the counterweight pincers or
other pointed objects.
- When the beep signal is enabled (see section 6.8), pressing of any push button is
accompanied by a "beep".

10 - 0121
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
END
Buttons enabled
MENU : main functions screen (see 5.2)
: type of correction (see 5.5.4)
: balancing spin (see 5.5)
Dimensions gauge: when extracted, the Dimensions screen is selected (see 5.3).
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 of distance + diameter
gauge will cause automatic switching from the screen-save menu to the initial screen.
From the screen-save, the automatic start actuated by the guard is not available for safety reasons.
5.1.2 SCREEN-SAVE SCREEN
N.B.: Name of the wheel balancer's owner. Can be preset via the monitor (see Section 7.2)
HOFMANNINDUSTRIAL
GmbH
Hauptstraße, 59
A-5302 HENNDORF - AUSTRIA

0121- 11
5.2 - MENU ACCESS DIAGRAM
N.B. : - The symbol " ... " indicates the presence of a further menu.
- To return to the previous menu, press button
HOME
STOP
- To return to the initial screen, press buttonMENU
Machine parameters set-up
Language
Unit of unbalance measurement
Unbalance display threshold
Unbalance display pitch
Spin with guard closing
Screen-saver time
Next
MENU
B
A
user
control
(5.4)
Call user
Save user
Optimization
Dimensions
Statistics
Set-up
Special functions
Cancel
G
Cancel
C
D
PASSWORD : + + +
RESERVED FOR EXPERT PERSONNEL
Machine parameters set-up
Special functions
Visual eccentricity check
Beep signal
Clock settings
selections
user control
Width measurement
Adhesive weight dispenser
Eccentricity measurement
Customer's personal data
Users' names
Calibration
Previous
Cancel
E
Cancel
Calibrations
F
Potentiometer
Adhesive weight dispenser
Eccentricity correction
Wheel balancer self-calibration
Calibrations
Distance
Diameter
Width
Wheel balancer self test
Cancel
Cancel

12 - 0121
5.3 - PRESETTING OF WHEEL DIMENSIONS
5.3.1 AUTOMATIC PRESETTING
The screen appears upon extracting the distance + diameter gauge.
The indication "dimension acquired" is given by the symbol of the correction weight which changes from blue
to red.
- Standard wheels: Using the special handle, move the tip of the gauge against the rim in one of the positions
A/B shown in fig. 8 and wait for the weight symbol in the screen to pass from blue to red.
N.B. Always use the round part of the striking surface.
When the acoustic beep is enabled (see section 6.8), acquisition of the dimensions is accompanied by a "beep".
Fig. 8
The above calibration is required for the ALU, 1, 2, 3, 4, CTS,
Static and Dynamic modes.
- Return the gauge to position 0.
- The current width value, which can be changed manually,
appears at the bottom of the screen.
POS. A
POS. B

0121- 13
- Preset the nominal width, which is normally stamped on the
rim, or else measure the width "b" with the calliper gauge
(standard accessory).
- Press button to switch to manual setting of all wheel dimensions.
- Press button to return to the Measurement screen.
"AUTOMATIC WIDTH" OPTION
- Move the gauges simultaneously into measuring position.
For distance + diameter gauge, see fig. 8.
Fig. 8B WIDTH gauge
During gauge movement, the symbols appear in movement on the display (see fig.8C/8D) indicating that
the gauges are not steady.
- Hold the gauges still in position for approx. 2 sec.
- Successful memorization is given by the change in colour of the correction weights which passes from
blue to red.
- Return the gauges to rest position.
N.B. - If the symbols of fig. 8C/8D remain on the display, it means that relative measuring gauge is not in
rest position.
- The two measurements (distance + diameter and width) can be made at different moments. In this
case first make the (distance + diameter) measurement. Correct position of the gauge tips is
essential for accurate measurement. Incorrect measurement of the distance entails incorrect width
measurement. Check that the data calculated with the nominal width stamped on the rim (errors up
to 1/2" do not normally cause appreciable residues).
Fig. 8D
Fig. 8C

14 - 0121
- Wheel ALU-M (correction on the inside for two balancing planes with direct calibration)
After measurement made on inside FI, as illustrated in fig. 9, move the gauge out further to memorize the
data regarding the outside FE. Select position A or B in fig. 8 as required and hold the position for at least
2 seconds. The counterweight symbols change colour.
When the acoustic beep is enabled (see section 6.8), acquisition of the dimensions is accompanied by a "beep".
Fig. 9 (ALU M)
FI
FE
Should the difference between the set diameters exceed 2 inches, the wheel balancer automatically reverts
to ALU-3M. In this case, be careful to correctly apply the weights since in ALU 3M the inner side has a clip
instead of an adhesive weight.
Fig. 9A (ALU 3M)
FI
dI
dE
FE
N.B. Manually modifying dl automatically forces dE=0.8 x dl.
Remember to update dE by measuring the real diameter.
The following buttons are enabled:
Selection of Manual dimensions setting screen
/ HOME
STOP
Return to Initial screen
Balancing spin
5.3.2 TO CALL MEMORIZED MEASUREMENTS
\ \ \ Press button with your name, then:
- by pressing the measured values (5.4) are called, without taking into
account of other measurements made in the meantime.
- when is pressed, the currently preset dimensions are saved.

0121- 15
5.3.3 - MANUAL PRESETTING (Use only in special cases or for checking)
If necessary, the dimensions can be inserted or edited in manual mode as follows:
- press MENU + or else press from the Dimensions screen in automatic mode (which
can be reached by pulling out the distance + diameter gauge).
- press to select the dimension to be preset (highlighted in red).
- press / to preset the required value.
- press to change unit of measurement.
- press to set the dimensions for the ALUM correction mode.
Definition of dimensions:
= DIAMETER : Preset the nominal diameter stamped on the rim.
= WIDTH: Preset the nominal width indicated on the rim.
= DISTANCE: Preset the distance in cm of the wheel from the machine.
Fig. 10

16 - 0121
- Wheel ALU M or ALU 3M:
Even in ALUM or ALU 3M correction mode, the dimensions can be input or modified manually using the
buttons shown on screen in accordance with the technical data displayed.
Go to initial screen (5.1) Then press.
2
5
: type of correction
: ALU M
+ 4
For a better understanding of the screen contents, refer to the following outline:
Fig. 10A (ALU M)
14 mm
Distance reading

0121- 17
To go to the ALU 3M manual dimension setting screen, press:
2
: type of correction
4
: ALU 3M
+
4
For a better understanding of the screen contents, refer to the following outline:
Fig. 10B (ALU 3M)
14 mm
Distance reading
- To return to the normal wheel dimension setting screen, press the button .

18 - 0121
5.4 - USER CONTROL
The wheel balancer can be used simultaneously by 4 different users who, through a simple sequence, can
Save user
Cancel
memorize their work condition and call it when needed. The users' names can be memorized (7.2).
5.4.1 - USER MEMORIZATION
- Preset the dimensions correctly according to the procedures already described in sections 5.3.1 and
5.3.3.
- Press MENU ; the "MENU" window appears on the monitor.
- Press ; a window appears with the list of available USERS. The current user is displayed in red.
- 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 MENU ; the "MENU" window appears on the screen.
- Press , a window appears with the list of available USERS. The current user is displayed in red.
- 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.
- Alternatively, proceed as described in section 5.3.2.
N.B. :
- The dimensions memorized as USER are lost when the machine is switched off.
- The USER control is also valid for the ALU-M dimensions.
- The current USER is always displayed in the Measurements and Dimensions screens.

0121- 19
5.5 - RESULT OF MEASUREMENT
End
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 6.8), 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 correction mode (ALU1, ALU2, ALU3, ALU 3M, ALUM, STATIC, ALU4, CTS,
DYNAMIC). When the mode is changed, the unbalance values are recalculated automatically on
the basis of the previous spin (5.5.4).
Eccentricity measurement graph (optional). The symbol appearing above the button changes to
red if the eccentricity is excessive.
Split control for splitting of unbalance over presettable components (5.5.2). Button only enabled in
STATIC or ALU M correction.
Indication of the longitudinal position of the unbalance (5.5.1.) is enabled
MENU 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.

20 - 0121
5.5.1 - INDICATION OF EXACT CORRECTION WEIGHT POSITION
It is recommended to always use this function when correcting the unbalance through adhesive weights:
ALU S, ALU 1, ALU 3, ALU 3M, ALU M.
In all cases this function allows cancelling approximations in the mounting of counterweights with
consequent reduction of the residual unbalance.
- Press button from the Measurements screen.
- Pull out the rim distance+diameter gauge in position A or B in fig. 8. Approach of the weight to the
correction position is indicated by a moving coloured arrow [ ].
- When a fixed arrow [ ], is reached, rotate the wheel to correction position (FI or FE) and apply the
counterweight in the 6 o'clock position.
When the acoustic beep is enabled (see section 6.8), reaching of a fixed arrow [
"beep".
], is indicated by a

0121- 21
5.5.2 - "SPLIT" CONTROL
The SPLIT function is only possible in the case of static unbalance, ALU 3M or ALU-M on the outside. It
serves for concealing any stick-on unbalance correction weights behind the rim spokes.
TO PRESET THE NUMBER OF RIM SPOKES
- From the STATIC, ALU 3M or ALU-M measurement screen, press ;
- A window appears on the display indicating the currently preset number of spokes.
- Set the required number of spokes in the range 3 to 12 by pressing and
- Press to confirm the presetting.
- Bring a spoke to the 12 o'clock position.
- Press ; the Measurement Screen reappears with the unbalance values already split.
The ALU-M unbalances on the inside do not vary while as regards the STATIC and ALU-M unbalances on the
outside two weights appear for the same side:
- Gradually turn the wheel until an unbalance value appears.
- Apply an adhesive weight of the value indicated on the screen for the outside or STATIC, behind the
spoke in the 12 o'clock position.
- Again turn the wheel until a new unbalance value appears.
- Apply an adhesive weight of the value indicated on the screen for the outside or STATIC, behind the
spoke in the 12 o'clock position.
- Perform a spin to check for correct wheel balancing.
N.B. : - When SPLIT is enabled, the icon
appears to the left of the screen..
- When the position repeat function (see 5.5.1) is enabled, the weight application position is rephased
in the 6 o'clock position.

22 - 0121
5.5.3 - UNBALANCE OPTIMIZATION
UNBALANCE OPTIMIZATION
CAUTION!! The previous spin should have been performed with the
currently mounted wheel.
Indicate the rim-adapter position with a reference mark in order to
remount the rim on the adapter in the same position.
Remove the wheel from the wheel balancer.
Turn the tyre on the rim by 180°.
Remount the wheel on the wheel balancer positioning the reference
mark of the rim with that of the adapter.
Close the guard and press the (START) push button.
Cancel
The symbol
is displayed automatically for static unbalance exceeding 30 grams (1.1 oz). 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 MENU +
after a first spin and follow the instructions appearing on the monitor.
5.5.4 - ALU AND STATIC MODES
From the Measurement screen, press button
: a window with the possible modes appears.
Select the type required through the numeric keys. The return to the Measurement screen with the recalculated
values is automatic. A symbol always appears at the top of the screen indicating the enabled weight application
position.
TYPE OF CORRECTION
TYPE OF CORRECTION
DYNAMIC
STATIC
MORE
PREVIOUS

0121- 23
STANDARD
Balancing of steel or light alloy rims with application of clip-on weights
on the rim edges.
STATIC
The STATIC mode is necessary for motorcycle wheels or when it is not
possible to place the counterweights on both sides of the rim.
ALU-1
Balancing of light alloy rims with application of adhesive weights on the
rim shoulders.
12/13 mm
adapter surface
ALU-2
Balancing of alloy rims with hidden application of the adhesive weight
on the outside. The position of the outside weight is fixed.
ALU-3 Combined application: clip-on weight inside and hidden adhesive
weight
on the outside (Mercedes). Outside weight position is the same
as ALU- 2.
ALU-4
Combined application: clip-on weight the outside and hidden adhesive
weight inside
CTS
ALU M
Special balancing with snap-in adhesive weights between the edge of
the tyre and rim, for both sides.
Balancing of light alloy rims with hidden application of adhesive
weights.
The weight positions can be set on screen for both sides.
ALU 3M Combined application as for ALU 3.
The weight positions can be set on screen for both sides.
5.5.5 - MINISTAT - TO CANCEL STATIC UNBALANCE
This function can be selected from the Setup screen. It serves for optimizing the residual unbalance by correcting
a wheel with standard counterweights in steps of 5 grams (1/4 oz.).
Thanks to this particular function, the position and best correction value are calculated in order to cancel the
static unbalance: the main cause of the vibrations which can be felt inside the car.

24 - 0121
5.6 - STATISTICS
DAILY N° OF SPINS:
This indicates the number of spins made after switching
on of the machine. Such parameter is reset automatically
when the machine is switched off.
TOTAL N° OF SPINS:
This indicates the number of spins made since the last
resetting of such counter. This parameter remains
memorized when the machine is switched off.
The following buttons are enabled:
: for resetting the daily number of spins.
: for resetting the total number of spins.
Requires correct setting of a password.
Statistics
Daily N° of spins
Total N° of spins
Reset daily spins
Reset total spins
Cancel
HOME
STOP
: to return to previous screen (MENU).
MENU : to return to the Measurements screen.
5.7 - ECCENTRICITY MEASUREMENT (OPTIONAL)
The much enlarged figures show the outer tyre
surface and axis of wheel rotation.
Fig. A shows measurement of the total Peak-to-Peak
eccentricity defined as maximum radial deviation of the
tyre surface.
Fig. A
Epp
Fig. B
E1h
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 - (yellow)
GRAPH 2 - (red)
For 1st harmonic, the
maximum deviation
usually should not
exceed 1,2 mm. In the
latest software the
sysmbol above button
no. 4 changes to red
as soon as this value is
too high.
GRAPH 1:
GRAPH 2:
represents the actual Peal-to-Peak eccentricity.
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 cursor on the screen indicates the current value with the phase referred to the
correction point.

0121- 25
6 - SETUP
(see 5.2 - 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:
HOME
STOP
: return to previous window
MENU : 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
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- MINISTAT
This represents the display pitch of the unbalance and varies according to the unit of measurement
selected. The selection "5 g" (1/4 oz) 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 fixed in
steps of 5 grams (1/4 oz).(MINISTAT).
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.
6.9 - CLOCK SETTING
This function allows correct setting of the time. Follow the instructions on the monitor.

26 - 0121
- WARNING -
7 - SPECIAL CALIBRATIONS AND FUNCTIONS
(See access diagram 5.2)
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 - ENABLING OF WIDTH MEASUREMENT
This function enables/disables automatic width measurement with contact device. Select:
- OFF in the case of machine with manual width measurement;
- TOUCH for machine with automatic width measurement (OPTION)
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 - ENABLING OF ECCENTRICITY MEASUREMENT
This enables/disables measurement of tyre eccentricity during the unbalance measuring spin.
7.4 - CALIBRATIONS
When
is pressed from the Special Functions menu, access is gained to the Calibration menu.
7.4.1 - GAUGE CALIBRATION
Select the gauge to be calibrated and follow the instructions appearing on the monitor.
N.B.:
- In the diameter gauge calibration it is highly important to position the gauge correctly as shown in figure 8.

0121- 27
7.4.2 - ADAPTER ECCENTRICITY CORRECTION
This function allows electronic compensation of the systematic balancing error due, for example, to an
eccentric adapter. It is not able to compensate for errors due to worn adapters or adapters with a certain
amount of play.
Never use this function unless advised by specialist personnel. Follow the instructions on the monitor.
When the Eccentricity Correction is enabled, the icon
appears at the bottom of the screen.
7.4.3 - WHEEL BALANCER CALIBRATION
For calibration of the machine, proceed as follows:
- Mount an iron wheel of average size; example 6" x 14" (± 1"). It does not have to be perfectly balanced.
- Preset the wheel dimensions with GREAT CARE.
- Follow the instructions appearing on the monitor.
7.4.4 - 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.
HOME
STOP
Returns to previous menu.
7.4.4.1 - 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.
Encoder check
M1335 - H700 v.1.00
Widht
Check for correct operation
of the diameter gauge; the
number increases when the
gauge is rotated outwards
Check for correct
operation of the
distance gauge; the
number increases
when the gauge is
pulled out.
Check of the eccentricity
sonar (option): the number
decreases when a surface is
approached to the sonar
Check of the width sonar: 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.

28 - 0121
8 - ERRORS
ERROR N°
Guard open
ERRORS
MEANING
1 No rotation signal. Could be due to a faulty position transducer, or to the motor failing to
start, or to something preventing the wheel from turning.
2 During the measurement spins, wheel speed had dropped below 60 r.p.m. Check
encoder functioning (see 7.4.4.1) and repeat the spin.
3 Error in the mathematical calculations, most probably caused by incorrect carrying out
of the self-calibration. Repeat the self-calibration. Wheel unbalance too high.
4 Motor turning in opposite direction.
5 Guard open before start of spin.
7/8/9 Fault in the machine setup parameters.
Check for correctness of the basic setup parameters and repeat the machine
calibration. Contact Technical Service.
11 Speed too high for the measurement.
12/13/14 Overflow of counters used for the measurement. Check encoder functioning (see 7.4.4.1)
Contact Technical Service.
15/16/17/18 Contact Technical Service.
20 Wheel stopped before having positioned it.
30 Error in handling the clock on the screen.
40 to 53 Error in handling the graphs regarding eccentricity measurement.

0121- 29
9 - ROUTINE MAINTENANCE
9.1 - SCHEDULED MAINTENANCE
Switch off the machine from the mains before carrying out any operation.
9.2 - TO REPLACE THE FUSES
Remove the weight holder shelf to gain access to the power supply board where the 4 fuses are
located (see Exploded Drawings). If fuses require replacement, use ones of the same
current rating. If the fault persists, contact Technical Service.
9.3 - ADAPTER END-PIECE, SPINDLE P
- Keep the internal felt ring constantly lubricated.
NONE OF THE OTHER MACHINE PARTS REQUIRE MAINTENANCE.