electronic microprocessor wheel balancer with three-dimensional ...

0055 - 1
HofmannIndustrial GmbH
A - 5302 Henndorf
Hauptstraße 59
Tel +43-6214-6466-12 \ Fax -22
ELECTRONIC MICROPROCESSOR WHEEL BALANCER
WITH THREE-DIMENSIONAL GRAPHIC VISUAL DISPLAY
UNIT FOR CAR, COMMERCIAL VEHICLE AND
MOTORCYCLE WHEELS
0055 - 1998.12
( Series A ) ( Series A )
Operating instruction manual
Weight and accessories table
Protection cover
Visual
display unit
Control
panel
Automatic
width reading
gauge
Wheel balancer
chuck
Flange
stakes
Automatic distance + diameter
gauge
Parking and emergency
brake pedal
Pneumatic chuck lock
pedal

2 - 0055
CONTENTS
page
1- GENERAL DETAILS ..................................................................................................................................................................... 5
1.1 - GENERAL SAFETY PRECAUTIONS ........................................................................................................................... 5
1.1.1 - STANDARD SAFETY DEVICES ............................................................................................................................... 5
1.2 - FIELD OF USE ............................................................................................................................................................. 5
1.3 - OVERALL DIMENSIONS ............................................................................................................................................. 5
1.4 - TECHNICAL DETAILS ................................................................................................................................................. 6
2 - HANDLING, LIFTING ................................................................................................................................................................. 6
3 - SETTING UP ................................................................................................................................................................................ 7
3.1 - SECURING .................................................................................................................................................................. 7
3.2 - POWER CONNECTIONS ............................................................................................................................................. 7
3.3 - PNEUMATIC CONNECTIONS (Model P) ...................................................................................................................... 7
3.4 - FURTHER SAFETY DEVICES (MODEL P) .................................................................................................................. 7
3.5 - FITTING THE FLANGE ................................................................................................................................................. 7
3.6 - FITTING AND ADJUSTING THE PROTECTION COVER (Table 4 - Exploded drawings) ............................................... 7
4 - CONTROLS AND COMPONENTS ............................................................................................................................................... 8
4.1 - BRAKE PEDAL ............................................................................................................................................................ 8
4.2 - PNEUMATIC LOCKING PEDAL (Model P) ................................................................................................................... 8
4.3 - DISTANCE AND DIAMETER MEASUREMENT GAUGE ............................................................................................. 8
4.4 - WIDTH MEASUREMENT GAUGE ............................................................................................................................... 8
4.5 - AUTOMATIC WHEEL POSITIONING ........................................................................................................................... 8
4.6 - CLOCK MANAGEMENT ............................................................................................................................................... 8
4.7 - KEYBOARD ................................................................................................................................................................. 9
5 - WHEEL BALANCER INDICATIONS AND OPERATION ............................................................................................................ 10
5.1 - INITIAL FRAME .......................................................................................................................................................... 10
5.1.2 - SCREEN SAVER FRAME ...................................................................................................................................... 10
5.2 - MENU ACCESS DIAGRAM ....................................................................................................................................... 11
5.3 - SETTING THE WHEEL DIMENSIONS ....................................................................................................................... 12
5.3.1 AUTOMATIC SETTING .............................................................................................................................................. 12
5.3.2 - RETRIEVING STORED MEASUREMENTS ............................................................................................................ 14
5.3.3 - MANUAL SETTING ................................................................................................................................................. 15
5.4 - USER MANAGEMENT ............................................................................................................................................... 16
5.4.1 - USER STORAGE .................................................................................................................................................... 16
5.4.2 - USER RETRIEVAL .................................................................................................................................................. 16
5.5 - 5.4 MEASUREMENT RESULT ................................................................................................................................... 17
5.5.1 - INDICATION OF EXACT POSITION OF CORRECTION WEIGHTS ......................................................................... 18
5.5.2 - "SPLIT" MANAGEMENT ......................................................................................................................................... 19
5.5.3 - IMBALANCE OPTIMISATION .................................................................................................................................. 20
5.5.4 - ALU AND STATIC MODE ........................................................................................................................................ 20
5.5.5 - CORRECTING STATIC IMBALANCE ...................................................................................................................... 21
5.6 - STATISTICS ............................................................................................................................................................... 21
5.7 - RUN-OUT MEASUREMENT (OPTIONAL) .................................................................................................................. 22
6 - SETUP ....................................................................................................................................................................................... 23
6.1 - LANGUAGE ............................................................................................................................................................... 23
6.2 - IMBALANCE MEASUREMENT UNIT ......................................................................................................................... 23
6.3 - IMBALANCE DISPLAY THRESHOLD ........................................................................................................................ 23
6.4 - IMBALANCE DISPLAY STEP ................................................................................................................................... 23
6.5 - SPIN WITH COVER CLOSED .................................................................................................................................... 23
6.6 - SCREEN-SAVER TIME .............................................................................................................................................. 23
6.7 - VISUAL RUN-OUT CHECK ........................................................................................................................................ 23
6.8 - ACOUSTIC ALARM .................................................................................................................................................... 23
6.9 - SETTING THE CLOCK ............................................................................................................................................... 23
FOR EXPERT ENGINEERS ONLY
7 - CALIBRATION AND SPECIAL FUNCTIONS ............................................................................................................................ 24
7.1 - WIDTH MEASUREMENT ENGAGEMENT ................................................................................................................. 24
7.2 - SETTING CUSTOMER AND USER NAME ................................................................................................................ 24
7.3 - RUN-OUT MEASUREMENT ENGAGEMENT ............................................................................................................. 24
7.4 - CALIBRATIONS .......................................................................................................................................................... 24
7.4.1 - GAUGE CALIBRATION .......................................................................................................................................... 24
7.4.2 - FLANGE RUN-OUT CORRECTION ......................................................................................................................... 25
7.4.3 - WHEEL BALANCER CALIBRATION ....................................................................................................................... 25
7.4.4 - SELF-DIAGNOSIS ................................................................................................................................................... 25
7.4.4.1 - ENCODER CONTROL .......................................................................................................................................... 25
8 - ERRORS .................................................................................................................................................................................... 26
9 - ROUTINE MAINTENANCE ......................................................................................................................................................... 27
9.1 - SCHEDULED MAINTENANCE ................................................................................................................................... 27
9.2 - REPLACING THE PROTECTION FUSES .................................................................................................................. 27
- WHEEL BALANCER EXPLODED DRAWINGS
- EC DECLARATION OF CONFORMITY

0055 - 3

4 - 0055
Note: Due to international agreements this machine may not be sold in the following countries:
France, Germany, Italy, USA

0055 - 5
1 - GENERAL DETAILS
1.1 - GENERAL SAFETY PRECAUTIONS
- The wheel balancer must only be used by authorised and adequately trained personnel.
- The wheel balancer must not be used for purposes other than those indicated in the manual
- The wheel balancer must not be modified in any way, excepting modifications explicitly approved by
the manufacturer
- The safety devices must not be removed. Any job carried out on the machine must only be done by
skilled and authorised personnel.
- Avoid cleaning with strong jets of compressed air.
- To clean plastic panels or surfaces use alcohol (AVOID LIQUIDS CONTAINING SOLVENTS)
- Before starting the balancing cycle, make sure the wheel is correctly secured to the flange.
- The machine operator must not wear loose clothing: Unauthorised persons must not come near the
wheel balancer during the operating cycle.
- Avoid placing objects in the machine bed that could jeopardise correct wheel balancer operation.
1.1.1 - STANDARD SAFETY DEVICES
- STOP button for stopping the wheel in emergencies
- Highly-resistant, shockproof plastic protection cover; specially designed to prevent counterweights
from flying upwards and hitting the operator.
- A microswitch prevents the machine from being started if the cover is not lowered and stops the motor
when the cover is raised.
1.2 - FIELD OF USE
The wheel balancer is suitable for balancing car or motor-cycle wheels weighing under 65 kg.
It can be used at temperatures between -10° + 45° C.
It is able to measure radial geometric deformity (run-out) (Optional)
1.3 - OVERALL DIMENSIONS
Fig. 1

6 - 0055
1.4 - TECHNICAL DETAILS
Weight with cover (excluding flange)............. 138 kg model 800
..................................................................... 159 kg model 800P
Single-phase power supply ........................... 115-230 V 50-60 Hz
Insulation class ............................................. IP 54
Max. power input ........................................... 500 W
Monitor .......................................................... SVGA 14"
Balancing speed ........................................... - 180 min1
Cycle time for average wheel (14 kg) ............ 6 seconds
Balancing precision ...................................... 1 gram
Position resolution ......................................... ± 1.4 °
Mean noise level ........................................... < 70 dB (A)
Rim - machine distance ................................ 0 - 285 mm
Settable rim width .......................................... 1.5" ÷ 20" or 40 ÷ 510 mm
Settable diameter .......................................... 10" ÷ 24" or 265 ÷ 615 mm
Total diameter of wheel within cover .............. 1067 mm (42")
Total width of wheel within cover ................... 500 mm
Max. wheel weight ......................................... 65 kg
Min/max compressed-air pressure ................ 7 ÷ 10 kg/cm 2
~ 0.7 ÷ 1 Mpa;
~ 7 ÷ 10 BAR;
~ 100 ÷ 145 PSI.
2 - HANDLING, LIFTING
NOTE: DO NOT RAISE THE WHEEL BALANCER USING DIFFERENT LIFTING POINTS
Fig. 2
Fig. 3

0055 - 7
3 - SETTING UP
3.1 - SECURING
The machine can operate on any flat non-elastic surface.
Makes sure only the 2 support points (fig. 3) actually touch the floor.
If possible, we recommend securing the machine to the floor by means of the feet (see figure 3).
3.2 - POWER CONNECTIONS
The machine features a single phase and earth lead.
The power voltage (and mains frequency) is shown on the machine identification plate and cannot be
changed.
Mains connection must be done by expert personnel.
The machine must not be started until it is properly earthed
Connection to the power mains must be made using a slow-acting safety switch set at 2A (230V) or 4A
(115V).
3.3 - PNEUMATIC CONNECTIONS (Model P)
To set up operation of the pneumatic clamping chuck (constant thrust gas-operated spring), connect the
wheel balancer to the compressed-air system. The connection fitting is on the rear of the wheel balancer.
At least 7 kg per sq cm (~ 7 MPa; ~ 7 BAR; ~ 100 PSI) are needed to ensure correct operation of the
release mechanism.
3.4 - FURTHER SAFETY DEVICES (MODEL P)
- Wheel always locked even in the event of a pressure break during the balancing cycle
- Rotating-block wheel clamping device to prevent the wheel coming off the flange in the event of
the pneumatic clamping pedal being accidentally pressed during the balancing cycle
Always operate the release control pedal when the machine is at a standstill, thereby preventing
abnormal flange stress and wear.
3.5 - FITTING THE FLANGE
The wheel balancer features a cone flange for securing wheels with centre hole. Other optional flanges can
be fitted:
Fig. 4
A
B
Fig. 4A
A
B
800 a) Remove the threaded end section A after removing
screw B.
b) Fit the new flange
800P
a) Unscrew rod B
b) Unscrew end section A
c) Fit the new flange
3.6 - FITTING AND ADJUSTING THE PROTECTION COVER (Table 4 - Exploded drawings)
a) Secure the components to the bed as described in exploded table 4.
b) The position of the closed cover can be adjusted by means of the screw accessible from the rear. The
correct position is shown in Fig. 1
c) Make sure the microswitch is pressed when the cover is closed.
d) Adjust the angular position of the microswitch control (item 403).

8 - 0055
4.1 - BRAKE PEDAL
Fig. 5
4 - CONTROLS AND COMPONENTS
This enables the operator to hold the wheel fast during
counterweight fitting. This must not be operated
during the measurement cycle.
4.2 - PNEUMATIC LOCKING PEDAL (Model P)
Fig. 6
For releasing the wheel on the flange. Do not operate
during machine cycle and/or when flanges different to
standard-cone flanges are fitted.
4.3 - DISTANCE AND DIAMETER MEASUREMENT GAUGE
For measuring the distance and the diameter of the wheel at the point where the counterweight is fitted.
The same gauge can be used to correctly position the counterweights inside, using the specific function
(see 5.5.1) for visual display-reading the position used for measurement, inside the rim. (For calibration,
see 7.4.1)
4.4 - WIDTH MEASUREMENT GAUGE (OPTION)
For measuring the width of the wheel to be balanced at the counterweight fitting point.
(See para. 5.3.1)
4.5 - AUTOMATIC WHEEL POSITIONING
At the end of the spin, the wheel is positioned in line with the unbalance on the outer sidewall or on the
static (when selected)
Positioning is automatically disabled in the case of wheels below 13" in diameter.
Precision is ± 20 degrees for wheels weighing up to 25 kg
4.6 - CLOCK MANAGEMENT
The wheel balancer features a clock having an operating-autonomy, with the machine off, of about one
month. In the event of the machine being shut off for long periods, when first starting this up, check and, if
necessary, reset the time (see 6.9).

0055 - 9
4.7 - KEYBOARD
Fig. 7
Function keys: for immediate selection of functions shown on screen
Special functions
selection
Confirm
Measurement
cycle start
Machine cycle stop
Note:
Only press the keys with fingers; do not use counterweight pliers or other
pointed tools.

10 - 0055
5 - WHEEL BALANCER INDICATIONS AND OPERATION
The screen provides and shows various details, as well as numerous operating options for the operator.
Such information is split into "frames" or "display pages".
5.1 - INITIAL FRAME
Enabled keys
MENU : main functions frame (see 5.2)
: type of correction (see 5.5.4)
: balancing spin (see 5.5)
Dimensions gauge: when this is pulled out, the dimensions frame is selected (see 5.3)
If the machine stays on the initial frame for a time which can be set on the visual display unit without being used,
this will automatically switch to a screen saver. If any key is touched or the wheel or distance+diameter gauge
are moved, the screen will automatically switch back to the initial frame. Automatic protection-cover start is not
possible from screen saver for safety reasons.
Note: Name of wheel balancer owner. This can be set on the visual-display unit (See para. 7.2)
5.1.2 SCREEN SAVER FRAME

0055 - 11
5.2 - MENU ACCESS DIAGRAM
Note:
- the symbol " ... " indicates the presence of another menu
- to return to the previous menu, press key
HOME
STOP
- to return to initial frame press key
MENU
MACHINE PARAMETER SET-UP
Language
English
Unbalance measurement unit
Unbalance visual. threshold
Unbalance visual. step
Spin with protection cover closed
Screen saver time
MENU
B
A
User
control
(5.4)
User reference
User save
Optimization
Dimensions
Statistics
Set-up
Special functions
Cancel
Next
G
Cancel
MACHINE PARAMETER SET-UP
Run-out visual check
Acoustic signal
selection
C
D
PASSWORD : + + +
FOR EXPERT PERSONNEL ONLY
SPECIAL FUNCTIONS SELECTIONS
Width measurement
Adhesive weight dispenser
Run-out measurement
Clock setting
user
management
General customer details
User names
Settings
Previous
Cancel
E
Cancel
SETTINGS
Distance
Diameter
Width
F
SETTINGS
Potentiometers
Adhesive weight dispenser
Run-out correction
Wheel-balancer self-calibration
Wheel balancer self-test
Cancel
Cancel

12 - 0055
5.3 - SETTING THE WHEEL DIMENSIONS
5.3.1 AUTOMATIC SETTING
Manual End
The display page appears showing the distance+diameter measurement gauge.
The "acquired dimension" indication is indicated by the symbol of the correction weight changing from blue to red.
- Standard wheels: Using the special grip, move the end of the gauge against the rim, push the gripper upwards
and wait for the weight symbol on the screen to change from blue to red.
In the case of acoustic signal enabled (see 6.8), dimension acquisition is indicated by a "beep".
Fig. 8
The calibration thus made is required for ALU 1,2,3,4 CTS, Static and Dynamic modes.
Manual setting can be made using the buttons as described at 5.3.3
- Press button to switch to manual width setting:
Select
Unit
End

0055 - 13
- Set the nominal width, normally indicated on the rim, or
determine the width "b" with the caliper provided.
- Press button to return to the measurement frame
"AUTOMATIC WIDTH" OPTION
- Move both gauges to measuring position as shown below:
Fig. 8A
DISTANCE+DIAMETER gauge
Fig. 8B
WIDTH gauge
During movement, the symbols of the screen (see fig. 8C/8D) move to show that the gauges are not stable.
- Keep the gauges still in position for about 2 seconds
- Data storage is indicated by the colour of the correction weights which passes from blue to red.
- Return the gauges to idle position.
N.B. - If the symbols in fig. 8C/8D remain on the screen, this means that at least the relevant
measurement gauge is not in idle position.
- The two measurements (distance+diameter and width) can be made at different times. In this case,
first of all determine (distance + diameter). The correct position of the gauge prods is most
important for precise measurement. Wrong distance measurement means wrong width
measurement; compare the calculated measurement with the nominal width shown on the rim,
(errors up to ½" do not normally cause substantial problems).

14 - 0055
Fig. 8D
Fig. 8C
Manual End
- ALU-M wheel (correction from inside for two balancing levels with direct calibration)
After measuring the inner sidewall FI, as shown in fig. 9, further remove the gauge to store the data of the
outer sidewall FE. Note: Once the positions have been achieved, always push the calipers upwards and
hold these still for at least 2 seconds. The counterweight symbols will change colour.
In the event of an acoustic signal being engaged (see 6.8), data acquisition is accompanied by a "beep".
Fig. 9
The enabled buttons are:
Manual dimension setting frame selection
/ HOME
STOP
Return to initial frame.
Balancing spin
5.3.2 RETRIEVING STORED MEASUREMENTS
\ \ \ Press the name button and then:
- press to retrieve stored measurements (5.4), ignoring other measurements
made in the meantime.
- press to save the currently set dimensions

0055 - 15
5.3.3 - MANUAL SETTING (Only use in special cases or for checking)
Unit
If necessary, dimensions can be entered or changed manually as follows:
- press MENU + or press from automatic dimensions frame (accessible by pulling out
the distance + diameter gauge);
- press to select the dimension to be set (displayed in red);
- press / to set the desired value;
- press to change the unit of measurement.
Definition of dimensions:
= DIAMETER : Set the nominal diameter indicated on the rim.
= WIDTH : Set the nominal width shown on the rim
= DISTANCE : With gauge idle, determine the distance in cm of the machine wheel. Set the
value removing 1.5 cm.
Fig. 10

16 - 0055
5.4 - USER MANAGEMENT
User save
Cancel
The wheel balancer can be used at the same time by 4 different users who, by means of a simple
sequence can store their work condition and retrieve this in case of need. The names of the users can be
stored (7.2)
5.4.1 - USER STORAGE
- Correctly set the dimensions as already described at paragraphs 5.3.1 and 5.3.3
- Press MENU ; the "MENU" window will appear on the screen
- Press ; the window will display a list of available USERS. The current USER is indicated in red.
- Press the number indicating the desired USER. The system will automatically return to the initial frame.
5.4.2 - USER RETRIEVAL
- Make a measurement spin with any dimensions
- Press the MENU button ; the "MENU" window will appear on the screen
- Press , the window will display a list of available USERS. The current USER is indicated in red.
- Press the number indicating the desired USER. The system will automatically return to the initial frame with
recalculation of the unbalance values based on the actual dimensions of the retrieved USER.
- Alternatively, proceed as indicated at paragraph 5.3.2
N.B. :
- the dimensions stored as USER are lost when the machine is switched off;
- USER management is also valid for ALU-M dimensions;
- the current USER is always displayed on the measurement and dimension frames

0055 - 17
5.5 - MEASUREMENT RESULT
Fine
After making a balancing spin, the unbalance values are displayed along with arrows useful for positioning at
the point of application of the correction weight. After positioning the wheel, fit the weight upwards along the
vertical.
In the event of minor unbalance of the set threshold value, instead of the unbalance value, "OK" is displayed
to indicate that, on that sidewall, the wheel is within tolerance levels; by pressing
can be displayed, with a precision of 0.5 g (0.1 oz).
, the outstanding value
The enabled buttons are:
Outstanding balance display
Correction procedure selection (DYNAMIC, STATIC, ALU1, ALU2, ALU3, ALU4, CTS). By
changing procedure, the automatic recalculation occurs of the unbalance values in accordance
with the previous spin (5.5.4).
Run-out measurement graph (optional)
Imbalance division management on settable components (5.5.2). Button only enabled with
STATIC or ALU M correction.
Longitudinal unbalance position (5.5.1) enabled
MENU
Selection of special functions
Balancing spin
N.B.: If the machine stays in this frame without being used for longer than the time set in the Setup
parameters (6), the frame automatically returns to screen-saver.

18 - 0055
5.5.1 - INDICATION OF EXACT POSITION OF CORRECTION WEIGHTS
It is always best to use this function for correcting unbalance using adhesive weights: ALU 1, ALU 2, ALU
3, ALU M.
This function is designed to cancel any approximation in fitting counterweights, with consequent reduction
of outstanding unbalance.
- Press button on the measurement panel
- Remove the distance+diameter gauge. Movement of the weight towards the correction position is
indicated by a coloured arrow that moves [ ].
- Once a fixed arrow [ ] has been reached, turn the wheel to correction position (FI or FE) and fit the
counterweight, turning the clamp upwards until this attaches to the wheel.
In the event of the acoustic alarm being engaged (see 6.8), when a fixed arrow [
"beep" is heard.
] is reached, a
Fig. 11

0055 - 19
5.5.2 - "SPLIT" MANAGEMENT
SPLIT is only possible in the case of outer sidewall static or ALU-M unbalance. Its purpose is to hide any
unbalance correction adhesive weights behind the spokes of the rim.
input
SETTING THE NUMBER OF RIM SPOKES
- Press on the STATIC or ALU-M measurement panel;
- - A window will appear on the screen indicating the number of spokes currently set
- Set the number of desired spokes in a range between 3-12 by means of button and
- press to confirm the setting
- Move a spoke upwards along the vertical
- press ;the measurement panel will reappear on the screen with the unbalance figures already split up.
The inner sidewall ALU-M unbalance does not vary, while for the outer sidewall STATIC and ALU-M unbalance,
two weights appear for the same sidewall:
- slowly turn the wheel until an unbalance figure appears;
- fit an adhesive weight of the displayed value, for the outer sidewall or STATIC, behind the spoke uppermost
along the vertical;
- again turn the wheel until a new unbalance value appears;
- fit an adhesive weight of the displayed value, for the outer sidewall or STATIC, behind the spoke uppermost
along the vertical;
- make a spin to check correct wheel balance.
Note: if SPLIT is engaged, the icon
will appear in the lower part of the screen.

20 - 0055
5.5.3 - UNBALANCE OPTIMISATION
UNBALANCE OPTIMISATION
IMPORTANT!!! The previous spin must have been made
with the currently fitted wheels.
Make a reference mark to indicate the rim-flange position
in order to refit the rim on the flange in the same position.
Remove the wheel from the wheel balancer.
Turn the tyre by 180° on the rim.
Refit the wheel on the wheel balancer so the rim and
flange references coincide.
Close the cover and press (START)
End
The symbol
is automatically displayed for static unbalance over 30 grams (1.1 oz). The program allows
reducing total wheel unbalance, offsetting, whenever possible, the tyre unbalance with that of the rim. Two spins
are required with rotation of the tyre on the rim at the second spin.
Press MENU +
after making the first spin and follow the instructions that appear on the screen.
5.5.4 - ALU AND STATIC MODE
Press button
: on the measurement panel: a window will appear on the screen showing the mode options.
Select the type required by means of the numeric buttons. Return to measurement panel with recalculated figures
is automatic. The upper section of the screen always shows a symbol indicating the enabled fitting position of
the weights.
TYPE OF CORRECTION
Static
Dynamic

0055 - 21
NORMAL
Balancing steel or light-alloy rims with the fitting of weights with clips
on the rim edges
STATIC
STATIC correction is required in the case of motorcycle wheels or when
it is not possible to fit counterweights on the two sides of the rim
ALU - 1
Balancing of light-alloy rims with the fitting of adhesive weights on the
shoulder of the rims.
12/13 mm
support table
ALU - 2
ALU - 3
ALU - 4
Balancing of light-alloy rims with hidden fitting of outer adhesive weight.
The position of the outer weight is fixed.
Combined balancing: clip weight on inner sidewall and hidden adhesive
weight on outer sidewall (Mercedes). The position of the outer weight
is the same as ALU - 2.
Combined balancing: adhesive weight on outer sidewall, clip weight on
inner sidewall.
CTS
Special balancing with clip-in adhesive weights between the edge of the
tyre and the rim, for both sidewalls.
5.5.5 - CORRECTING STATIC UNBALANCE
Selected from set-up, this optimizes the outstanding unbalance, correcting a wheel with standard counterweights
5 grams at a time (1/4 ounces).
Thanks to this special function, the position and best correction value is calculated so as to correct static
unbalance, which is the biggest cause of vibrations felt inside the vehicle.
5.6 - STATISTICS
NUMBER OF DAILY SPINS:
this indicates the number of spins made since the
wheel balancer was started up. This parameter is
automatically reset when the machine is turned off.
NUMBER OF TOTAL SPINS:
this indicates the number of spins made since the
last counter reset. This parameter remains stored in
the memory even when the machine is turned off.
The enabled buttons are:
: for resetting the number of daily spins
: for resetting the number of total spins.
Requires the correct setting of a password;
STATISTICS
Number of daily spins
Number of total spins
Daily spin reset
Total spin reset
Cancel
HOME
STOP
: to return to previous frame (MENU);
MENU : to return to measurement panel.

22 - 0055
5.7 - RUN-OUT MEASUREMENT (OPTIONAL)
The figures indicate the, much amplified, outer surface of the tyre and the wheel rotation axis.
Fig. A shows total Peak-Peak run-out
measurement, defined as maximum radial
deviation of the tyre surface.
Fig. B shows the 1st harmonic run-out
measurement, or the run-out of the rim that
"recopies" the shape of the tyre, mediating the
local deviations of the tyre from round shape.
Fig. A
Epp
Fig. B
E1h
Obviously, the P.P. measurement is normally
greater than the 1st harmonic. Tyre manufacturers normally provide two different tolerances for the two
run-outs.
After making a balancing spin, the measurement of the tyre run-out can be made automatically by means
of the SONAR sensor on the cover. The sensor must be manually positioned in front of the tread.
RUN OUT
Max./Min.
GRAPH 1 - (yellow)
GRAPH 2 - (red)
1st harmonic
Position
End
GRAPH 1
GRAPH 2
: represents the real Peak-Peak run-out
: represents the first harmonic run-out. For a wheel in good condition, this graph should appear
almost as a straight line.
By moving the wheel, the cursor indicates current value, with the phase referring to the
correction point.
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.

0055 - 23
6 - SETUP
(See 5.2 - Menu access diagram)
The Setup frame provides the user with numerous options for setting the machine according to his needs.
All the settings remain unaltered even when the machine is switched off.
The enabled buttons are :
HOME
STOP
: return to previous window
MENU : go to measurement frame;
from to : to select parameter
6.1 - LANGUAGE
Permits selecting the language to be used for displaying description and diagnostic messages relating to
machine operation.
6.2 - UNBALANCE MEASUREMENT UNIT
Imbalances can be expressed in either grams or ounces
6.3 - UNBALANCE DISPLAY THRESHOLD
This is the unbalance threshold under which, at the end of the spin the message "OK" appears on the screen
instead of the unbalance value; the values which can be set vary according to the selected measurement unit.
6.4 - UNBALANCE DISPLAY STEP
Represents the unbalance display step and varies according to the selected measurement unit. The choice 5
g" (1/4 oz) enables the display of the correction values on the two sidewalls so as to bring the value of static
unbalance to 0 (theoretical). This function is best set when the machine is used in standard mode as the balancing
quality is improved. The computer performs a complex calculation whereby the static residue is cancelled by
changing the value and position of the fixed value counterweights 5 grams at a time (1/4 ounces).
6.5 - SPIN WITH COVER CLOSED
By selecting "ON", the automatic spin start is engaged when the cover is closed.
6.6 - SCREEN-SAVER TIME
When the machine has not been used for longer than the time set in this function, the computer automatically
returns to the initial frame. Set this time in seconds.
6.7 - VISUAL RUN-OUT CHECK
At the end of the spin, when the measured unbalance values re-appear on the screen, the cover can be opened
to visually check the wheel run-out while the wheel gradually loses speed. If, on the other hand, the cover is left
closed, the machine completes normal positioning.
6.8 - ACOUSTIC ALARM
By selecting "ON", an acoustic alarm is enabled (beep) in the following cases:
- whenever a button is pressed;
- when dimensions are acquired automatically;
- when the correct weight application angular position is achieved, in the measurement frame;
- when the correct weight application angular position is achieved, in the position repeater.
6.9 - SETTING THE CLOCK
For correctly setting the time. Follow the instructions shown on the screen.

24 - 0055
- ATTENTION -
7 - CALIBRATION AND SPECIAL FUNCTIONS
(see access diagram 5.2)
In order to access the "Settings and special functions", a password must be entered.
Any wrong operation within the functions shown below could damage wheel balancer operation.
Unauthorised use will invalidate the machine warranty.
7.1 - WIDTH MEASUREMENT ENGAGEMENT
Engages/disengages automatic width measurement by means of a contact device. Select:
- OFF in the case of machine with manual width measurement;
- TOUCH in the case of machine with automatic width measurement (OPTIONAL).
7.2 - SETTING CUSTOMER AND USER NAME
The machine can be customised by setting:
a) The name to appear in the initial frame (screen-saver).
b) The name of 4 different wheel balancer users (USER NAME)
The screen will show an "ideal" keyboard with the set of characters available for writing messages.
The customer's name consists of 3 lines of at most 30 characters each.
User names have at most 15 characters each.
7.3 - RUN-OUT MEASUREMENT ENGAGEMENT
Engages/disengages tyre run-out measurement during the unbalance measurement spin
7.4 - CALIBRATIONS
By pressing
from the special functions menu, the calibration menu can be accessed
7.4.1- GAUGE CALIBRATION
Select the gauge to be calibrated and follow the instructions on the screen.
Note:
- when calibrating the diameter gauge, it is most important to position the gauge correctly as shown in
figure 8.

0055 - 25
7.4.2 - FLANGE RUN-OUT CORRECTION
This electronically compensates any systematic balancing error due, for instance, to flange run-out. It is
not able to compensate for worn flanges or with play.
Do not use unless advised to do so by skilled personnel. Follow the instructions shown on the screen.
When this function is engaged, the icon
appears in the lower part of the screen.
7.4.3 - WHEEL BALANCER CALIBRATION
To calibrate the machine, proceed as follows:
- Mount an iron wheel of average size, example 6''x14'' (±1''). It does not have to be perfectly balanced.
- VERY CAREFULLY set the wheel dimensions
- Follow the instructions on the screen
7.4.4 - SELF-DIAGNOSIS
This automatic self-diagnosis cycle facilitates troubleshooting. At the end of the self-diagnosis, numerous
parameters are indicated which are useful to the after-sales service for finding machine faults.
HOME
STOP
Return to previous menu
7.4.4.1 - ENCODER CONTROL
In turning the chuck must:
- change the angular position "POS" from 0 to 128;
- cause the "UP" message to appear by turning the wheel clockwise and the "DOWN" message to appear
by turning the wheel in the other direction
Encoder control
Diameter gauge function
control: the number increases
by turning the gauge outwards
Distance gauge
function control: the
number increases when
the gauge is removed.
Run-out sonar control (optional):
the number drops when
a surface is moved near the
sonar
End
Width gauge function control:
the number drops when the
gauge is moved near the flange
In the event of a wheel balancer fault or malfunction, notify all displayed parameters to the After-sales service.

26 - 0055
8 - ERRORS
Opened guard
ERROR
MEANING
1 No rotation signal. This could be due to a faulty position transducer, to the motor not
having started or to something stopping the wheel from turning.
2 During spin, the speed drops below 60 1/min. Repeat the spin.
3 Mathematical calculation error, very likely caused by incorrect self-calibration. Repeat
self-calibration. Wheel unbalances too high.
4 Motor turning in wrong direction.
5 Protection cover open before start of spin
7/8/9 Machine setup parameter error.
Check basic setting parameters are correct and repeat wheel balancer calibration.
Contact after-sales service.
11 Speed too high for reading
12/13/14 Reading counter overflow. Contact the after-sales service
15/16/17/18 Contact the after-sales service
20 Wheel stops before having positioned
30 Screen clock management error
40÷53 Run-out measurement graph management error.

0055 - 27
9 - ROUTINE MAINTENANCE
9.1 - SCHEDULED MAINTENANCE
Before performing any maintenance operation, interrupt power to the machine
9.2 - REPLACING THE PROTECTION FUSES
Accessible by removing the weight carrying table, the power and power supply board features 4 protection
fuses (see exploded Tables, Item 317). In the event of these having to be replaced, fuses of identical
current carrying capacity must be used. If the fault reoccurs, contact the after-sales service.
THE OTHER MACHINE PARTS REQUIRE NO MAINTENANCE

EG-Konformitäts-Erklärung
Declaration of Conformity
Déclaration de Conformité
The Company / Hiermit bescheinigt das Unternehmen / La Maison
HofmannIndustrial GMBH
Hauptstraße 59
A-5302 Henndorf
herewith declares conformity of the Products /erklärt hiermit die Konformität desProdukts / déclare par la présente la
conformité du Produit / Declare la conformidad del Producto/erklærrer hermed overensstemmelse for
produktet/Försäkrar härmed överensstämmelse för produkten:
Balancer -Auswuchtmaschine -
Equilibreuse - Balanceadora - Hjulbalanceringsmaskine - Balanseringsmaskin
Tipo - Nr. di serie / Type - Serial Number / Typ - Fabriknummer, usw / Type - Numero de série / Tipo - Numero de
fabricacion/ af typen / Typ-Serienummer
megaspin 800 - 800P
Manufacturing List Number-Erstellungsliste nummer-Numéro de liste de construction
Numero de fabricacion-Fremstillingslistenummeret- Tillverkningsnummer
A/B/C
900M800B2/6 - 905M800B2/6
with applicable regulations below / mit folgenden einschlägigen Bestimmungen /
selon les normes ci-dessous / con directivas subaplicables/i henhold til folgende direktiver/med följande direktiv:
D.P.R. Nr. 459, from 24 July 1996
EC Directive / EG Richtlinie / Directive CEE / Directivas CE/EOF Direktivet/EEG direktiv
98/37/CEE - 73/23/CEE - 93/68/CEE - 89/336/CEE
Applied Armonized Standards / Angewendete Harmonisierte Normen /
Normes Harmonisées Appliquées / Normas Aplicadas en Conformidad/Folgende harmoniserede standarder/följande harmoniserade
standarder
EN 292-1 EN 292-2 EN 294 EN 349
EN 418 EN 457 EN 60204-1 EN 60439-1
EN 50081-1 EN 50082-1 EN 50081-2 EN 50082-2
Date / Datum / Date / Fecha/Dato/Datum
Signature / Unterschrift /Signature/Firma/Underskrift
20/ 0 4 / 9 9 HOFMANN INDUSTRIAL
Dipl.Wirt.-Ing. Peter Dau