Instructions for use I - Hofmann Megaplan

Instructions for use
I
INDEX
Page
1 - GENERAL .................................................................................................................................................................... 3
1.1 - GENERAL SAFETY REGULATIONS ...............................................................................................................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, HOISTING ...............................................................................................................................................4
3 - START-UP ....................................................................................................................................................................4
3.1 - ANCHORING ....................................................................................................................................................4
3.2 - ELECTRICAL CONNECTION ..........................................................................................................................4
3.3 - PNEUMATIC CONNECTION (P version only) .................................................................................................5
3.3.1 - FURTHER SAFETY DEVICES ...........................................................................................................5
3.4 - ADAPTER MOUNTING ....................................................................................................................................5
3.5 - WHEEL GUARD ASSEMBLY AND ADJUSTMENT............................................................................................5
4 - CONTROLS AND COMPONENTS ..............................................................................................................................6
4.1 - BRAKE FOOTSWITCH ....................................................................................................................................6
4.2 - PNEUMATIC LOCKING FOOTSWITCH (VERSION P) ...................................................................................6
4.3 - AUTOMATIC DISTANCE AND DIAMETER GAUGE ........................................................................................6
4.4 - MANUAL RIM DISTANCE GAUGE (OPTION) ................................................................................................6
4.5 - AUTOMATIC WHEEL POSITIONING ...............................................................................................................6
4.6 - CONTROL PANEL AND DISPLAY ................................................................................................................... 7
4.6.1 - HANDLING OF THE FUNCTIONS MENU ..........................................................................................8
5 - INDICATIONS AND USE OF THE WHEEL BALANCER ............................................................................................9
5.1 - DOUBLE OPERATOR PROGRAM ..................................................................................................................9
5.2 - PRESETTING OF WHEEL DIMENSIONS .......................................................................................................9
5.2.1 - AUTOMATIC PRESETTING ................................................................................................................9
5.2.1.1 - “AUTOMATIC WIDTH” OPTION ....................................................................................................10
5.2.1.2 - ALU-M WHEEL ............................................................................................................................... 11
5.2.2 - MANUAL PRESETTING .................................................................................................................... 11
5.3 - RECALCULATION OF THE UNBALANCE ....................................................................................................12
5.4 - RESULT OF MEASUREMENT .......................................................................................................................13
5.4.1 - INDICATION OF EXACT CORRECTION POSITION IN ALU-M.........................................................13
5.4.2 - RESOLUTION OF THE UNBALANCE (SPLIT) ................................................................................15
5.4.3 - UNBALANCE OPTIMIZATION ..........................................................................................................16
5.4.4 - ALU AND STATIC MODES ................................................................................................................17
5.4.5 - AUTOMATIC MINIMIZATION OF STATIC UNBALANCE ..................................................................17
6 - SET UP ......................................................................................................................................................................18
6.1 - SELF-DIAGNOSTICS .....................................................................................................................................18
6.2 - SELF-CALIBRATION ......................................................................................................................................19
6.3 - AUTOMATIC GAUGES ..................................................................................................................................20
6.3.1 - DISTANCE GAUGE ..........................................................................................................................20
6.3.2 - DIAMETER GAUGE ..........................................................................................................................20
6.3.3 - WIDTH GAUGE (OPTION) ...............................................................................................................21
7 - ERRORS ....................................................................................................................................................................22
7.1 - INCONSISTENT UNBALANCE READINGS .................................................................................................. 22
8 - ROUTINE MAINTENANCE ........................................................................................................................................ 22
8.1 - REPLACEMENT OF THE FUSES .................................................................................................................22
8.2 - ADAPTER TERMINAL OF P SPINDLE ..........................................................................................................22
9 - LIST OF RECOMMENDED SPARE PARTS .............................................................................................................23
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1 - GENERAL
1.1 - GENERAL SAFETY REGULATIONS
- The machine should only be used by authorized and suitably trained personnel.
- Do not use the machine for purposes other than those speciÞed in this manual.
- The machine should not be modiÞed in any way except for those modiÞcations explicitly carried
out by the manufacturer.
- Never remove the safety devices. Any work on the machine should only be carried out by
specialist personnel.
- Avoid using strong jets of compressed air for cleaning.
- Use alcohol to clean the plastic panel 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 avoid wearing clothes with ßapping edges. Make sure that
unauthorized personnel do not approach the machine during the work cycle.
- Avoid placing objects inside the base as they could impair the correct operation of the machine.
1.1.1 - STANDARD SAFETY DEVICES
- Stop push button for stopping the wheel under emergency conditions.
- The plastic safety guard of high impact strength is with shape and size designed to avoid risk of
counterweights from ßying out in any direction except towards the ßoor.
- A microswitch prevents the machine from starting if the guard is not lowered and it stops the
motor when the guard is raised.
1.2 - FIELD OF APPLICATION
The machine is designed for balancing wheels of cars, light commercial vehicles or motorcycles,
weighing less than 65 kg. It can be operated in the temperature range of -10°C to +45°C.
The following functions are provided: Double operator; ALU-M automatic; SPLIT; Unbalance optimization;
Self diagnostics; Self calibration
1.3 - OVERALL DIMENSIONS
Fig. 1
687
1935
1635
1352
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1.4 - SPECIFICATION
Weight with guard (excluding adapter) .............................108 kg, standard spindle 400 version
...........................................................................................120 kg, pneumatic spindle 400P version
Single phase power supply ..............................................115/230 V 50-60 Hz
Protection class .................................................................IP 54
Max. power consumption ..................................................1100 W
Balancing speed................................................................180 r.p.m.
Cycle time for average wheel (14 kg) ...............................6 seconds
Max. resolution of measurement .......................................1 gram
Position resolution .............................................................± 1.4°
Average noise....................................................................< 70 dB(A)
Rim-machine distance.......................................................0 to 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 inside guard.....................................1067 mm (42”)
Total wheel width inside guard ..........................................500 mm
Min/max compressed air pressure ....................................7 to 10 kg/cm² (0.7 ~ 1Mpa; 7 ~ 10 BAR;
...........................................................................................100 ~ 145 PSI)
2 - HANDLING, HOISTING
Fig.2
Fig. 2a
N.B.: NEVER USE OTHER POINTS TO HOIST
THE MACHINE
3 - START-UP
3.1 - ANCHORING
The machine can operate on any ß at non resilient ß oor. Make sure that the machine rests on the 3
mounting points provided (Þ g. 2). It is advisable to secure the system to the ground using the speciÞ c feet
(see Figure 2a) in the event of continual use with wheels weighing over 35 Kg.
3.2 - ELECTRICAL CONNECTION
The machine is supplied with a single phase cable plus earth (ground).
The supply voltage (and mains frequency) is given on the machine nameplate. It cannot be changed.
Connection to mains should always be made by expert personnel.
The machine should not be started up without proper earthing.
Connection to the mains should be through a slow acting safety switch rated at 4 A (230 V) or 10 A
(110 V). See enclosed wiring diagram.
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3.3 - PNEUMATIC CONNECTION (P version)
For the operation of the spindle with pneumatic locking, (constant thrust gas springs) connect the machine
to the compressed air mains. The connection Þ tting is on the rear of the machine. At least 7 kg/cm²
(~0.7Mpa; ~ 7 BAR; ~ 100 PSI) are required for the correct operation of the locking device.
3.4 - FURTHER SAFETY DEVICES (P version)
- The wheel is always locked also in the event of insufÞ cient pressure during the balancing cycle.
- A wheel check device with rotating block which prevents the wheel for slipping off the adapter in
the event of accidental pressure on the wheel locking footswitch during the cycle. Always actuate the
unlocking footswitch when the machine is stationary in order to avoid stress and abnormal wear on
the adapter.
3.5 - ADAPTER MOUNTING
The wheel balancer is supplied complete with cone type adapter for fastening wheels with central bore.
Other optional adapters can be mounted:
Fig. 3
A
B
Fig. 3A
A
B
Megaspin 400
a) Remove threaded end piece A after backing off
screw B.
b) Mount the new adapter (see enclosed brochures)
Megaspin 400P
a) Remove the rod B
b) Remove terminal A
c) Mount 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 speciÞ c exploded view.
b) The position of the wheel guard when closed can be adjusted with relative screw accessible at the
back. Correct position is indicated in Þ g. 1.
c) Check that the microswitch is held down when the guard is closed.
d) Adjust the angular position of microswitch control.
3.7 - SPACER WD
When balancing very wide wheels (9”), there is
not enough space to turn the distance gauge.
To withdraw the wheel from the machine side, Þ t
spacer WD on the adapter body and secure it with
the standard issue nuts. When centring the wheel
with the cone on the inside, Þ t the other cone as a
spacer to obtain spring thrust.
Spring
SPACER WD
Spacer joint
Centring Joint
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4.1 - BRAKE PEDAL
4 - CONTROLS AND COMPONENTS
This pedal allows the operator to hold the wheel
when Þ tting the counterweights. It must not be
actuated during the measuring cycle.
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 stable positions: top, wheel
unclamped; bottom, wheel clamped
4.3 - AUTOMATIC DISTANCE AND DIAMETER GAUGE
This gauge allows measuring distance of the rim from the machine and the diameter at the point of
application of the counterweight. This gauge also allows correct positioning of the counterweights inside
the rim by using the speciÞ c function (see INDICATION OF EXACT CORRECTION POSITION IN ALU-M) whereby
the position can be read on the display; this function is used for the measurement (for calibration, see
ALU-M WHEEL).
4.4 - MANUAL RIM DISTANCE GAUGE (OPTION)
This gauge serves for manual measurement of the distance of the point of application of the counterweight
from the machine. (see “AUTOMATIC WIDTH” OPTION )
4.5 - AUTOMATIC WHEEL POSITIONING
At the end of the spin, the wheel is positioned according to unbalance on the outside or static unbalance
(when selected).
Positioning is disabled automatically for wheels smaller than 13” in diameter.
Accuracy is approx. ± 20 degrees for wheels weighing up to 25 kg.
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4.6 - CONTROL PANEL AND DISPLAY
Fig. 7
5
10 19 7
FINE
9 18
15
ALU
S D
inch
mm
MENU
STOP
11 17 8
3 1/2
4
USER 2
ALU M
mm
START HOME
ENTER
STOP
13 16 12 14
6
1-2 Digital readouts, AMOUNT OF UNBALANCE, inside/outside
3-4 Digital readouts, POSITION OF UNBALANCE, inside/outside
5 Indicators, correction mode selected
6 Indicators, selection made
7 Push button, unbalance reading < 5 g (.25 oz)
8 Push button, operator selection
9 Push button, selection of mode of correction
10 SPLIT push button (unbalance resolution)
11 Push button, FUNCTIONS MENU
12 Push button, selection conÞ rmation
13 Push button, cycle start
14 Push button, emergency
15 Push buttons, manual DISTANCE/DIAMETER/WIDTH setting
16 Push button, home
17 Push button, position repetitor
18 Push button, diameter and width measuring selection
19 Push button, unbalance optimization
N.B.:
Only use the Þngers to press the push buttons. Never use the counterweight pincers or other
pointed objects.
- When the beep signal is enabled (see section ACUSTIC SIGNAL), pressing of any push button is
accompanied by a “beep”.
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4.6.1 - HANDLING OF THE FUNCTIONS MENU
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5 - INDICATIONS AND USE OF THE WHEEL BALANCER
5.1 - DOUBLE OPERATOR PROGRAM
This program allows memorizing the dimensions of two types of wheels. Thus two operators can work
simultaneously on two different cars using the same balancing machine. The system memorizes two
programs with various preset dimensions.
1 - Press to select operator (1 or 2). Selection is conÞ rmed by panel-mounted LED.
2 - Enter the dimensions (see PRESETTING OF WHEEL DIMENSIONS)
3 - Press to carry out the balancing as usual and memorize the programme
With program 1 or 2 is called for subsequent balancing operations without having to newly enter
the dimensions.
5.2 - PRESETTING OF WHEEL DIMENSIONS
5.2.1 - AUTOMATIC PRESETTING
- Standard wheels (calibration necessary also for modes ALU 1,2,3, 4, Static)
Fig. 8
DISTANCE + DIAMETER
Using the special holder, move the gauge tip into contact against the rim, push the gauge upwards (Þ g. 8)
keeping it in position for at least 2 seconds.
Indication of gauge in movement
Fig. 8A
Indication of dimensions acquired
N.B.: In the event of acoustic
indicator enabled (see
par. HANDLING OF THE FUN
CTIONS MENU), the sto
rage of dimensions is fol
lowed by a “beep”.
Fig. 8B
Return the gauge to position 0.
The system automatically switches to WIDTH position
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Fig. 9
- Set the nominal width, which is normally
stamped on the rim, or proceed to measure
the width with the caliper gauge (supplied as
standard).
5.2.1.1 - AUTOMATIC WIDTH” OPTION
- Move simultaneously the gauges in the measuring position as follows:
Fig. 8C
DISTANCE + DIAMETER measuring gauge
Fig. 9A
WIDTH measuring gauge
When the gauges are shifted, the moving symbol (see Þ g. 8A) appears on the display indicating that
gauges are unstable.
- Keep the gauges in position for approx. 2 seconds.
- The values memorized are indicated on the display as shown in Þ g. 8B.
N.B.: In the event of acoustic indicator enabled (see par. HANDLING OF THE FUN CTIONS MENU), the sto
rage of dimensions is followed by a “beep”.
- Return the gauge to rest position.
N.B. :
- If the symbol in Þ g. 8B remains on the display, this means that at least one of the two
measurement gauges is not in the rest position.
- The two measurements (distance + diameter and width) can be made in different moments.
In this case carry out the measurement (distance + diameter) Þ rst. For an accurate measurement,
the gauge pins must be correctly positioned. An incorrect measurement of distance means an
incorrect measurement of width; compare the value measured with the nominal width shown on
the rim (errors up to ½” do not usually cause remarkable residuals).
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5.2.1.2 - ALU-M WHEEL
(correction from inside for two balancing planes with direct calibration):
Fig. 10
After measurement for inside F1 as shown in Þ g. 10, again remove the gauge in order to memorize
the data for the outside FE;
N.B.: once in position, always push the gauge upwards and keep it for at least 2 seconds.
Manual presetting is possible by using the push buttons as follows.
5.2.2 - MANUAL PRESETTING (Use only in special cases or for checking)
- Standard wheel
Fig. 11
- Press until a symbol is read out
- With gauge in rest position, measure the distance, in cm, of the
machine wheel. Set the value substracting 1.5 cm.
- Select by pressing
- Set the nominal diameter indicated on the tyre.
- Select by pressing
- Set the nominal width, which is normally stamped on the rim, or
proceed to measure the width with the caliper gauge (supplied as
standard).
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- ALU-M wheel
- Measure the values according to the diagram hereunder
Fig. 12
3
4
1
2
SETTING:
Select the value to be set by pressing
N.B.: not setting the value of the outside diameter ( )
the system automatically measures: outside
diameter ( ) = 0.8 x inside diameter ( ).
N.B.: not setting the value of the outside diameter ( ) the system automatically measures:
outside diameter ( ) = 0.8 x inside diameter ( ).
5.3 - RECALCULATION OF THE UNBALANCE
Press
after new setting of the measurement
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5.4 - RESULT OF MEASUREMENT
Fig. 13
Inside correction
Outside correction
After performing a balancing spin, the amounts of unbalance are shown on the digital readouts.
Digital readouts with LED’s 3- 4 lit up indicate the correct angular wheel position to mount the counterweights
(12 o’clock position). In the event of acoustic indicator enabled (see par. HANDLING OF THE FUNCTIONS
MENU) a “beep” indicate the correct correction position.
If the unbalance is less than the threshold selected, is displayed instead of the unbalance. With it
is possible to read the values below the threshold chosen gram by gram.
5.4.1 - INDICATION OF EXACT CORRECTION POSITION IN ALU-M
In correction mode ALU-M it is possible to cancel approximations in the mounting of the counterweights
by proceeding as follows:
Fig. 14
- Press push button
- Insert the correction weight in the special seat on the weight holding pliers;
- Remove the gauge taking into account that the following appears on the display:
to remove the gauge towards the outside
to move the gauge in rest position
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The left display shows the values for the correct inside positioning, the right display for the outside
positioning.
Fig. 15
- Bring the wheel into correct angular position;
- Move the gauge until the LED corresponding to the chosen correction plane lights up;
- Rotate the pliers upwards until the correct weight lies against the rim;
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5.4.2 - SPLIT FUNCTION (unbalance spread)
The SPLIT function is used to position the adhesive weights behind the wheel spokes so that they are
no longer visible. It is advisable to utilise this function only in the event of static unbalance or with
ALU-M functions. Input the wheel dimensions and start the spin. To start the SPLIT function, input the
following data:
Display example prior
to SPLIT function
Input the number of spokes (3-12)
- Place any spoke in the vertical position
15
30
- Place the Þ rst Split unbalance in correction position 1.
30
15
- Correction position 1
30
15
- Place the second Split unbalance in correction
position 2
30
15
- Correction position 2
To return to normal unbalance display, press the button
To perform a new spin, subsequently press the button
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5.4.3 - UNBALANCE OPTIMIZATION
- This function serves to reduce the amount of weight to be added in order to balance the wheel.
- It is suitable for static unbalance exceeding 30 g.
- It improves the residual eccentricity of the tyre.
A)
- Mark with chalk a reference point on the adapter and rim.
- With the aid of a tyre remover, turn the tyre on the rim by
180°.
- ReÞ t the wheel with the reference mark coinciding between
rim and adapter.
TYRE
POSITION
RIM
POSITION
- RH display: percentage reduction
- LH display: actual static unbalance which can be reduced by
rotation.
- Mark the two positions of the rim and tyre, and turn the tyre
on the rim until the positions correspond in order to obtain the
optimization on the display.
RETURN TO MEASUREMENT SCREEN
If before pressing the push button
a spin as follows:
a spin had not been carried out, the machine will ask for
The procedures starts again from A).
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5.4.4 - ALU AND STATIC MODES
From the Measurement screen, press button or to select the type required. The 5-LED
displays show the position where to apply the weights. If a spin has already been performed, the
processor automatically recalculates, for each change of mode, the amounts of unbalance according to
the new calculation.
Fig. 16 Button → DYNAMIC → STATIC → DYNAMIC
DYNAMIC
Balancing of steel or light alloy rims with application of
clip-on weights on the rim edges.
STATIC
Button
ALU - 1
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 M → ALU 1→ ALU 2→ALU 3→ ALU 4→ ALU M
Balancing of light alloy rims with application of adhesive
weights on the rim shoulders.
ALU - 2
Balancing of light alloy rims with hidden application of the
outer adhesive weight. Outer weight position is Þ xed.
ALU - 3
Combined application: clip-on weight inside and hidden
adhesive weight on outside (Mercedes). Outer weight
position is the same as ALU-2.
ALU - 4
Combined application: adhesive weight outside and
clip-on weight inside.
5.4.5 - AUTOMATIC ZEROING OF STATIC UNBALANCE
Initial unbalance
sx dx
g g
50°
Possible approximation
sx
dx
sx
dx
g g
g g
g g
g
static residual static residual static residual static residual
With a traditional
balancing machine
sx
4 g 3 g 1 g 6 g
This program is designed to improve the quality of balancing without any mental effort or loss of time by
the operator. In fact when using the normal commercially available weights, with pitch of 5 in every 5 g,
and when applying the two counterweights which a conventional wheel 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 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 (theoretical
zero). If it is not possible to completely zero the static unbalance with the dynamic unbalance kept in
tolerance, such function supplies the solution for minimizing the static unbalance.
dx
Choice with minimum static
residual
sx
dx
g
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6 - SET-UP
6.1 - SELF-DIAGNOSTICS
DISPLAY TEST
All displays, readouts and LED’s should light up in sequence
- Turn the wheel in direction of rotation.
The following appears:
- Turn the wheel in reverse direction of rotation
The following appears:
- In one complete rev. of the wheel (in direction of rotation)
this should appear once:
- Test parameter
- Displays values of DISTANCE sensor
- Displays values of DIAMETER sensor
- Displays values of WIDTH sensor (optional)
END OF SELF-DIAGNOSTICS
CANCELS SELF-DIAGNOSTICS IN ANY PHASE
HOME
or
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6.2 - SELF-CALIBRATION
For machine self-calibration proceed as follows:
- Mount any wheel on the shaft, even if not balanced; better still if of an “average” size.
- Preset the exact dimensions of the wheel mounted.( use a sized metal wheel 6" x 14" ± 1")
CAUTION!! Presetting of incorrect dimensions would mean that the machine is not correctly calibra
ted, therefore all subsequent measurements will be incorrect until a new self-calibration
is performed with the correct dimensions!
- Perform a spin under normal conditions.
- Add 100 g (3.5 oz) on the outside in any position.
- Shift the 100 g. weight from the outside to the inside keeping the
same position.
- Rotate the wheel until to shift the 100 g. weight to the 12 o’clock
position.
END OF SELF-CALIBRATION
HOME
or
CANCELS SELF-CALIBRATION IN ANY PHASE
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6.3 - AUTOMATIC GAUGES
6.3.1 - DISTANCE GAUGE
-Shift the distance gauge to the Þ rst mark (lower part of the gauge
rod), keeping it still, press
- Shift the distance gauge to the second mark , press
CORRECT CALIBRATION
- Return the gauge to position 0
- The wheel balancer is ready for operation
N.B. : In the event of errors or faulty operation, the writing : appears on the display: shift the
gauge to the Þrst mark and repeat the calibration operation exactly as described above. If the error
persists, contact the Technical Service Department. In the event of incorrect input in the rim distance
gauge calibration function, press to cancel it.
6.3.2 - DIAMETER GAUGE
- Currently preset diameter.
- Set the diameter with which to calibrate the machine (10 ¸18”)
- Press
- Shift the gauge tip into measuring position (Þ g. 8) and keeping it
still, press
CORRECT CALIBRATION
- Return the gauge to rest position
- The wheel balancer is ready for operation
In the event of incorrect input in the distance gauge calibration function, press
to cancel it.
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6.3.3 - WIDTH GAUGE (OPTION)
- Shift the width gauge tip into measuring position shown in Þ g. 16A and
keeping it still, press .
- Shift the gauge tip into measuring position shown in Þ g. 16B and
keeping it still, press .
CORRECT CALIBRATION
- Return the gauge to rest position
- The wheel balancer is ready for operation
Fig. 16A
Fig. 16B
*mm 300
N.B. :
- It is advised to carry out the width gauge calibration with the help of another person in order to
correctly position the gauge tip in the two required positions and press
simultaneously.
- In the event of errors or faulty operation, the writing : appears on the
display: shift the width gauge to rest position and repeat the calibration operation exactly as
described above. If the error persists, contact the Technical Service Department.
- In the event of incorrect input in the width gauge calibration function, press to cancel it.
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7 - ERRORS
During machine operation, various causes of faulty operation could occur. If detected by the microprocessor,
they appear on the display as follows:
ERROR
MEANING
1 No rotation signal. Could be caused by faulty position transducer, or something
preventing the wheel from turning.
2 During the measurement spins, wheel speed had dropped below 60 r.p.m. Check
encoder functioning (see Self-diagnostics). Repeat the spin.
3 Unbalance too high.
4 Rotation in opposite direction.
5 Guard open before start of spin.
7 Fault in reading the machine calibration parameters. Repeat the self-calibration.
8 Fault in reading the machine calibration parameters. Repeat the self-calibration.
General fault in memory of the machine calibration parameters. Contact CEMB
Technical Service Department HOFMANN.
The width value measured is too low. Repeat the width automatic measurement
making sure that the preset distance value is correct.
11 Speed too high during unbalance measurement spins.
12/13/14 DifÞ culty in reading the analog signal. Contact CEMB Technical Service Depart
ment HOFMANN.
15/17 Inside/outside analog signal too high. Contact CEMB Technical Service Depart
ment HOFMANN.
16/18 Inside/outside analog signal too high. Contact CEMB Technical Service Depart
ment HOFMANN.
7.1 - INCONSISTENT UNBALANCE READINGS
Sometimes after balancing a wheel and removing it from the balancing machine, it is found that, upon
mounting it on the machine again, the wheel is not balanced.
This does not depend on incorrect indication of the machine, but only on faulty mounting of the wheel on
the adapter; i.e. in the two mountings, the wheel has assumed a different position with respect to the
balancing machine shaft centre line. If the wheel has been mounted on the adapter with screws, it could
be possible that the screws have not been correctly tightened, i.e. crosswise one by one, or else (as often
occurs) holes have been drilled on the wheel with too wide tolerances.
Small errors, up to 10 grams (0.4 oz) are to be considered normal in wheels locked by a cone; the error is
normally greater for wheels fastened with screws or studs.
If, after balancing, the wheel is found to be still out-of-balance when reÞ tted on the vehicle, this could be
due to the unbalance of the car brake drum or very often due to the holes for the screws on the rim and
drum sometimes drilled with too wide tolerances. In such case a readjustment could be advisable using
the balancing machine with the wheel mounted.
8 - ROUTINE MAINTENANCE
Switch off the machine from the mains before carrying out any operation.
8.1 - REPLACEMENT OF THE FUSES
Remove the weight holder tray to gain access to the power PC board where the fuses are located (see
Exploded Drawings). If fuses require replacement, use ones of the same current rating. If the fault
persists, contact the Technical Service Department.
8.2 - ADAPTER TERMINAL OF P SPINDLE
- Always keep the inside felt ring lubricated
NONE OF THE OTHER MACHINE PARTS REQUIRE MAINTENANCE
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9 - LIST OF RECOMMENDED SPARE PARTS
(Referenced on the exploded drawings)
CODE
DESCRIPTION
020600503 Bearing 6005 - 2ZØ 25/47/12
181198630 Spring 19863P
080077007 Rigid belt Poly V - TB2 - 770 - 7 crests
67M38954C
St. position pickup board complete with cable
182245870 Brake lever spring 24587P
18FC38385
Spiral spring
86SB39034
Cable, automatic distance gauge
86SB36493
Cable, automatic diameter gauge
05PR38258
Display panel
511242101 16A two-pole rocker switch
67M36950A
Power PC board
681002000 Fusibles DM 5x20 - 2A
86SC38668
Computer board
86SB38585
Cable with microswitch
SPECIFIC COMPONENTS FOR 230V MACHINES
501054213 Single phase motor 220-240V/50-60 Hz - 0.18Kw 63/B3-4p.
86SZ40541
Complete power PC board
611000314 Brake transformer 30 VA 230
568001458 Capacitor 14MF 450V Faston screw / M8 screw
611000308 Power supply transformer 30 VA 230 - 9/9
SPECIFIC COMPONENTS FOR 115V MACHINES
502054114 Single phase motor 110-115V/50-60 Hz - 0.18Kw 63/B3 - 4p.
86SZ40542
Complete power PC board
611000313 Brake transformer 30VA 115
568002557 Capacitor 25MF 450V FASTON screw / M8 screw
611000307 Power supply transformer 30VA 115 - 9/9
SPECIFIC COMPONENTS FOR SE SPINDLE
020600702 Bearing 6007 2RS
18FP29329
Gas spring 115 kg - 75 mm stroke
162004292 Ball valve AS8
182198040 Spring, pneumatic pedal 19804P
67M38954C
St. position pickup board complete with cable
OPTIONAL COMPONENTS “WIDTH AUTOMATIC GAUGE”
86SB39035
Cable, with “width” potentiometer
I 0162 GB - 23

I 0162 GB - 24