Hofmann Geodyna 2350 Operation Manual

geodyna 2350

Operation manual Car wheel balancer

â

Hofmann Werkstatt-Technik

Contents · Safety rules and function

Contents Page

1. Safety rules and function 2.........................

2. Installation of the machine 5........................

3. Electrical connection 7.............................

4. Controls and displays 8............................

5. Turning on the machine 14.........................

6. Clamping the wheel 16.............................

7. Entry of balancing mode and wheel size 18...........

8. Balancing the wheel 28............................

9. Hidden spoke placement 32........................

10. Changing modes of operation 35....................

11. Error codes 42....................................

12. Pro-Match/weight minimisation 48...................

13. User calibration 59................................

14. Maintenance 60...................................

15. Technical data 60.................................

16. Electrical diagram 61..............................

1. Safety rules and function

1.1 Special hints for the reader

A few special features were used in this manual to facilitate
reading and understanding of pictures and written instructions:

warns the operator of injuries and damage

and names the consequences, if the operator does
not follow the instructions.

D signals the operator where to act.

Safety rules are highlighted in grey.

Arrow showing where to look

Arrow showing the direction to move

1.2 Scope of application

The off-the-vehicle wheel balancer is designedforstaticand/or
dynamic balancing of car and light-truck wheels weighing up to
150 lbs and having an overall diameter of 44”. An optional wheel
guard is available especially for balancing wheels with a rim di­ameter of more than 20”, but not mandatory for wheels of less
than 20” rim diameter as the balancer has a maximum speed of
98 rpm only. With optional wheel guard the maximum wheel di­ameter is reduced to 37”.

In addition to conventional balancing operations, irregular run­ning conditions of the wheel caused by geometric deformations
of the rims and unbalances of the tires, hence unsmooth ride,
can be identified, improved or, if possible, even eliminated. By
exact adjustment of the two wheel components relative to each
other optimum wheel running conditions or at least balance
weight minimisation can be achieved.

2

Operation manual geodyna 2350 - 9413 126

Safety rules and function

Fig. 1 View of wheel balancer

132

HOFMANN

geodyna

2350

Front view

1 Function keys and display
2 Weight tray
3 Gauge arm for distance rim/machine
4 Main arbor
5 Pedal for main shaft lock

4

Rear view

6 Power switch and line cord

1.3 General safety rules

Only properly trained and authorised personnel shall be al­lowed to operate the wheel balancer.

The machine must not be used except for the scope of ap­plication and in the way specified in this manual.

Unauthorised changes and modifications to the machine re-

5

lieve from any liability for damages and injuries that might re­sult therefrom.

On no account should safety features be removed or made
inoperative.

In general any work on the electrical system such as fitting
of a plug or changing of connections, if necessary, must be
carried out by a qualified electrician in line with relevant
national standards and the regulations of the local power
station.

It should be noted that working with technical equipment
may involve an unforeseeable acceptable risk.

Therefore the operator should eliminate such dangers in ad­vance by proper and wise behaviour.

6

The following special points should be observed:

Use technical equipment for its specified scope of applica­tion only.

Always use suitable and proper equipment and tools.

Follow the instructions, notes and technical data of the ma­chine manufacturer or manufacturer of the wheels to be bal­anced.

Wear suitable protective clothing and accessories (e. g.
goggles, safety shoes, helmet).

For further safety rules to be observed, please refer to the
individual chapters.

1

Operation manual geodyna 2350 - 9413 126

3

Safety rules and function

1.4 Description of function

Display and key pad

The display and key pad are arranged on the ergonomic front
panel.

Distance gauge arm

The distance between left correction plane and machine is de­termined by means of an integrated gauge arm with scale. The
reading shown on the scale is also entered via the key pad in the
same way as for rim diameter and rim width.

Entry of rim diameter and rim width is via the key pad, whereby
the relative function key is held pressed while the wheel is ro­tated to change the desired value. On releasing the key the
chosen input is stored.

The input range is identical with the working range of the ma­chine (see § 15. Technical data).

Balancing modes
Readings in different balancing modes (weight position on the
rim) can be given on the display, depending on the type of wheel
to be balanced (car, light truck, PAX, steel or alloy rim).

Measuring run and measured values

All measurements are taken and stored in one run during the
automatic program. On completion of measurement two aud­ible signals are given.

Amounts and locations of unbalance are read out separately for
each correction plane.

Main shaft lock

The machine has a pedal-operated main shaft lock which is
used to retain the wheel in the correction position so that the
balance weights can be fitted. This lock is designed only to fa­cilitate orientation of the wheel and must not be used for braking
the main shaft.

Store wheel profiles

Wheel profiles permit the storage of values for wheels that are
balanced frequently in order to save having to enter the wheel
data etc. each time. It is possible to store up to 4 wheel profiles.

Error codes

Errors in operation or failures in the electronic or mechanical
system are signalled via respective error codes (see § 11.
Error codes).

Readjustment by the operator

If several measuring runs are necessary to balance a wheel be­cause balance weight size and position have to be adjusted re­peatedly, this is often due to insufficient measurement accu­racy.
In such case the operator has the possibility of readjusting the
machine (see § 13. User calibration).

Optional wheel guard

As the maximum speed of the wheel during balancing is below
100 rpm a wheel guard is not mandatory in Germany, however
an optional wheel guard can be supplied. With mounted wheel
guard, the electronic unit can be programmed via code C13 so
that measurement is started by closing of the guard.

4

Operation manual geodyna 2350 - 9413 126

Installation of the machine

170

590

687

75

45832

2

3

1

2

2. Installation of the machine

When choosing the site, Health and Safety at Work regulations
and the regulations on working environment should be taken
into account.

The wheel balancers can be installed on any firm and level
ground. For the weight and space requirement of the machines
refer to § 15. Technical data. For installation on an upper floor,
check and observe the permissible load capacity of the floor.

It is recommended, though not absolutely necessary, that the
machine be secured to the floor. For this purpose three holes
(Fig. 2) are provided in the base of the machine by which the
latter is fixed on the floor with 3/8” anchor bolts. Fig. 2 shows the
center-to-center distance of the holes. Make sure that the ma­chine has a stable position, i.e. that it is supported on three
seatings. If not, ensure three-point contact on ground by insert­ing appropriate spacers between the floor and machine base.

For transport the wheel balancer is provided with special pack­ing (on pallet).

2.1 Unpacking the machine

The machine should be unpacked by two persons.

Note

When unpacking the machine make sure that the pedal fitted on
the machine base and the whole pedal assembly is not dam­aged.

4

5

SW 13

D Cut the strips of the packing (Fig. 3, item 1), lift off the

packing and set aside the small parts packed in the sep­arate small box (Fig.3,item2).

D Usea1/2” wrench to unscrew the three hexagon screws

which hold the machine on the pallet (Fig.4,arrows).

D Lift the machine by tube of the vibratory system and turn

around by 180 degrees on the pallet (Fig. 4).

D Then lower one side of the machine laterally on the floor

(Fig. 5).

D Remove the pallet from underneath the machine and

gently lower the entire machine onto the floor (Fig. 6).

6

Operation manual geodyna 2350 - 9413 126

5

Installation of the machine

7

1

8

2.2 Fit (optional) wheel guard and holder

The holder for the optional wheel guard is fitted on the rear of
the wheel balancer, the wheel guard itself is fitted on the right of
the balancer.

D Switch off the balancer.

D Undo the two M5 hexagon head screws and remove the

rear cover plate of the wheel balancer (Fig.7,arrow).

D Fit the pre-assembled wheel guard holder (Fig. 8,

item 1) to the outside of the cabinet using the 4 hexagon

bolts M8.

D Reach into the opening in the cabinet, pull out the lead

with plug located to the right of the opening and connect it
with the plug of the wheel guard switch.

D Replace the plug connector into the cabinet.

D Stick the adhesive clip (Fig. 8, item 2) on the rear of the

cabinet in a central position relative to the wheel guard
holder and insert the connecting lead of the microswitch.

2

1

2

D Fit the wheel guard spring (Fig.9,item1)into the spring

holder (Fig.9,item2).

D Pass the holder for the wheel guard spring through the

opening, tilting it in the process, and then fit it vertically so
that the recesses in the holder are located in the cabinet
panel.

D Extend the wheel guard spring and fit it into the bolt on

the wheel guard arbor (Fig.9,item3).

3

9

1

D Slide the wheel guard (Fig. 10, item 1) on the arbor and

raise it until the fastening holes of wheel guard and wheel
guard arbor coincide.

D Insert the M10 setscrew (Fig. 10, item 2) with washer

(Fig. 10, item 3) from below, and tighten the hexagon nut
(Fig. 10, item 4) and washer.

D Turn on the wheel balancer at the switch.

D Check wheel guard switch for correct setting:

When the wheel guard is open the wheel guard switch must be

5

4

pressed. The balancer must not start.

D Place the cover (Fig. 10, item 5) onto the holder for the

wheel guard arbor and fasten by means of tapping
screws.

10

3

6

2

Operation manual geodyna 2350 - 9413 126

Installation of the machine · Electrical
connection

1

2

11

Correct the switch point of the wheel guard switch

If the measuring run is not started (preset with C13), check the
switch point as follows:

D Unscrew the cover from the holder of the wheel guard

arbor.

D Undo the setscrew on the switch ring (Fig. 11, item 1).

D Adjust the switch ring so that it is contacting the

tongue of the microswitch underneath (Fig 11, item 2)
and the measuring run is started on closing the guard
(Fig. 12).

D Re-tighten the setscrew.

D Place the cover onto the holder for the wheel guard arbor

and tighten with tapping screws.

12

The optional wheel guard influences the following modes
of operation:

- The measuring run is started by closing the wheel guard
(code C13).

- The wheel is braked on lifting the wheel guard during a
measuring run (code C5).

These modes of operation can be changed either permanently,
or only as long as the machine is switched on, by means of
codes (see § 10. Changing modes of operation).

3. Electrical connection

In general any work on the electrical system such as fitting of
a plug or changing of connections, if necessary, must be car­ried out by a qualified electrician in line with relevant national
standards and the regulations of the local power station.

Electrical standard equipment and drive motor of the wheel ba­lancer are provided for operation on 50/60 Hz, 100-120 V
(-15 %, +10 %).

The connecting cable of the machine is designed as a separate
power cord. For connection to the power mains the cable is pro­vided with a NEMA 5-15P (U.S.) or C22.2 No. 42 (Canada)
plug.

Fusing is by the customer before the plug connector, using a
15 amp circuit breaker.

The electrical diagram is illustrated in § 16.

The machine operates internally on a line voltage of 230 V be­cause the voltage is regulated by an integrated transformer.

Operation manual geodyna 2350 - 9413 126

7

Controls and displays

4. Controls and displays

13

14

1

4

Fig. 13 Overview

1 START key

Start a measuring run

2 STOP key

- Interrupt the measuring run

- Delete an error code

- If input of a mode of operation is completed with
the STOP key, the new state is deselected

2

3

automatically and the former state is re-established.

3 Function keys (see Fig. 14 to 16)
4 Display (see Fig. 17 to 20)

Fig. 14 Function keys on the left

1 Function key for distance rim / machine
2 Function key for rim width
3 Function key for rim diameter

1

2

3

Fig. 15 Function keys in the middle

4 PRO MATCH

15

- Starts an optimisation program (LED PRO MATCH
lights).

- In the Pro-Match program:
enter valve position.

5 CLEAR/RESTORE

CLEAR (key pressed briefly): Setting the factory adjusted

modes of operation. All settings are deleted and the display

4

56

7

returns to standard.
RESTORE (key pressed for 3 seconds): Restores all
modes the way they were before clear was pressed.

6 CALIBRATE/CODE

CALIBRATE (key pressed briefly): Sets the machine in the

user calibration mode (see § 13. User calibration).
CODE (key pressed for 3 seconds): Switches to changing
modes of operation.

7G/OZ

Switches over the weight unit for unbalance readings
(grammes or ounces).

G Readings in grammes
Oz Readings in ounces

When the machine is switched on the weight unit set with
code C3 is active.

8

Operation manual geodyna 2350 - 9413 126

Controls and displays

8

16a

910

Fig. 16a Function keys on the right

8 ALU/ALU+ toggle key (ALU key) for balancing modes.

ALU (key pressed on top):

Toggles through the ALU and standard balancing modes.
While in any ALU mode the ALU status LED lights.
ALU+ (key pressed on bottom):
Sets the machine in the ALU+ mode. This enables the au­tomatic distance gauge arm to measure first the left-hand
distance and then the righthand hidden weight. Pressing
this key disables one-plane and patch balancing and en­ables only hidden weight balancing.
First push: Enables lefthand hammer-on weight and

lights lefthand hammer-on LED for balanc­ing mode ALU 3P in wheel position display.

Second push: Enables lefthand adhesive weight and lights

lefthand adhesive weight LED for balancing
mode ALU 2P.

Third push: Returns to standard balancing.

9 SPOKE/OPERATOR

SPOKE: Enters the number of spokes for the hidden spoke

placement mode.
Keep the key pressed on top and rotate the wheel to set, or
change, the number of spokes.
When the key is pressed without rotating the wheel, the
current setting is entered.

OPERATOR: Recalls and stores wheel profiles.

RCL: Keep the key pressed on bottom. RCL (recall)

comes up in the left-hand section of the display and 1
comes up in the right-hand section for the first wheel
profile to be stored.
Keep the key pressed on bottom and rotate the wheel.
Profiles 2 through 4 are read out in the right-hand dis­play. The stored wheel profile is entered once the key is
released.
STO: If a wheel profile is to be stored, keep on pressing
the key after the rcl readings have come up and continue
rotating the wheel. Now STO (store) comes up in the
left-hand display, and#1through 4 can be set in the
right-hand display by rotating the wheel. The current
profile is stored once the key is released.

10 RV-S/D

RV (key pressed on top):

Changes the fine resolution to increments for RV/Light
truck.

- Switches resolution to 2 instead of 1/4 ounce.

- Switches suppression minor unbalance readings to a
selectable value (using service code).

Readouts stay in RV mode until deselected by pressing the
key again.
S/D (key pressed on bottom):

- Function key to select display of dynamic or static
unbalance (S/D key).

Operation manual geodyna 2350 - 9413 126

9

Controls and displays

16b

11

Fig. 16b Function keys on the right

11 FINE/INT

FINE (pressed on top):

- Show amount reading with higher resolution:
1 gramme instead of 5 grammes or 0.05 oz instead of

0.25 oz (only for as long as the key is pressed)

- Display residual wheel unbalance below the threshold
for suppression of minor unbalance readings:
As long as the key is pressed the suppression of minor
unbalance readings is switched off and the actual unbal­ance in the wheel is read out.

- Display unbalance for standard balancing mode:
if balancing mode Alu 1 to Alu 5 is selected, press and
hold the FINE key and then press the function key for
balancing mode (ALU, ALU+). The unbalance readings
switch over to those for standard balancing mode and
the relative rim symbol appears.

- In the OP and Un programs the FINE key serves as
change-over key.

INT (pressed on bottom):

Switches to the patch balance mode.
All wheel data must have been entered. In addition the
height-to-width ratio specified on the tire has to be en­tered by pressing the diameter key and rotating the
wheel.
Readout display changes to single-plane. Both location
displays are active and work in parallel. Distance and di­ameter dimensions have no effect and are preset to
nominal values. All special functions are inactive and
cannot be selected.

10

Operation manual geodyna 2350 - 9413 126

Controls and displays

Fig.17 Display panel - left section

1 Direction indicator of left correction plane

17

12 34

inch
mm

ALU
FINE
INT
PROMATCH

=0

RV-LIGHT TRUCK

CALIBRATE
SPOKE

78

2 Indicates when correction position in the left correction

plane has been reached.

5

3 Inch/mm

The unit of measurement (inch or mm) is chosen by using
therimwidthkey.

4 Rim width Symbol

Lights whenever width key is pressed.

5 Digital Display for left correction plane to show:

-rimwidth

- amount of unbalance of left correction plane

- amount of static unbalance

- error codes

- C codes

- balancing mode in plain language (upon operation of
ALU key)

- STO, RCL of wheel profiles

Note: Error codes are read out in both digital displays.

Fig. 18 Status LEDs

1ALU: Any ALU balance mode is selected

18

1

2

3

4
5

ALU
FINE
INT
PROMATCH

=0

RV-LIGHT TRUCK

CALIBRATE
SPOKE

6

2FINE: FINE key is pressed (cancels supression of small

imbalances). Display changes to normal resolution as
soon as key is released.

3INT:Patch Balance is selected. All special functions (in-

cluding FINE) are inactive and cannot be selected.

4 PRO MATCH is selected.

9

5

=0Compensation run has been carried out

6 RV/LIGHT TRUCK resolution is selected.

7 CALIBRATE: Operator calibration mode is entered or pro-

grammable interval is reached.
The LED is automatically activated after 5000 measuring
runs and alerts the operator that operator calibration is rec­ommended. The LED remains on until the operator com­pletes the operator calibration.

8 SPOKE: Hidden spoke placement (HSP) mode is se-

lected.

9 Number of spokes

Number of spokes for hidden spoke placement. Holding
the SPOKE key pressed rotate the wheel to set the number
of spokes between 3 and 12.

Operation manual geodyna 2350 - 9413 126

11

Controls and displays

Fig.19 Display panel - central section

1 Measuring run indicators

flash alternately in top and bottom panel

- during measurement after pressing the START key

- during PRO MATCH

1

2 Possible weight fitting positions

LEDs change with successive pushs of the ALU key.

3 Valve stems

- Top valve stem flashes during PRO MATCH when valve
must be positioned perpendicular to the main shaft.

2

6

ALU

3

- After the valve has been placed perpendicular to the
main shaft and the PRO MATCH key is pressed, the
LED is turned off.

4 SAPE symbol

- As the distance lever is moved the first bar and gradually
the remaining bar segments light up. On reaching the
correction position, the segment furthest to the right

5

lights up and the speaker beeps.

- The symbol lights up when the weight fitting position is
first entered and later relocated.

Note

4

When the wheel is rotated manually, the SAPE symbol will not
light up.

5ALU+

lights whenever ALU+ is chosen.

12

19

1

6OK

lights whenever in two-plane mode both imbalance read­outs are 0.00.

Operation manual geodyna 2350 - 9413 126

Controls and displays

inch
mm

1

START

8

23 4 5

7

Fig.20 Display panel - section on the right

1 Loudspeaker

2 inch/mm

The unit of measurement (inch or mm) is chosen by using
the rim diameter key.

3 Rim diameter

6

lights whenever diameter key is pressed.

4 Digital display of right correction plane to show:

- rim diameter

- distance rim/machine (always in mm)

- amount of unbalance of right correction plane

- state of modes of operation or preset limit values

20

5 Direction indicator of right correction plane

6 Indicates when correction position in the right correc-

tion plane has been reached.

7 Distance machine/left correction plane

lights whenever distance key is pressed or distance gauge
arm is moved.

8 START

flashes when the START key is to be pressed during pro
match and operator calibration.

Fig. 21 Pedal for main shaft lock

21

This lock is designed only to facilitate orientation of the wheel
and must not be used for braking the main shaft.

The main shaft is locked when the pedal is depressed. This fa­cilitates tightening or untightening of the clamping nut and re­tains the wheel in the correction position for correct fitting of the
balance weights.

Operation manual geodyna 2350 - 9413 126

13

Turning on the machine

22

5. Turning on the machine

When switched on by the mains switch (Fig. 22, item 1) the
electronic unit performs a number of self-tests. On successful
completion of these tests a melodious three-tone signal is
given. OK is read out on the displays, and the code number of
the program version is briefly viewed on the display; then both
displays show wheel dimensions which were entered before

1

and are still stored in the electronic memory.

As long as the machine is carrying out the self-tests, no inputs
and no other operations whatsoever must be made. During this
starting phase the machine must not be subjected to even the
slightest vibration.

The electronic unit is factory-adjusted to the following modes of
operation, which are available after turning on:

- car wheel with nominal dimensions in inches, width 6.5
and diameter 15.0

- entry of rim data in inches

- display of amount of unbalance in 1/4 ounce increments

- suppression of minor unbalance readings (limit set to
1/4 ounce)

- compensation of adapter unbalance switched off

- start of measuring run by START key

23

24

25

26

Error codes at power on

If an error code occurs it must be acknowledged by pressing the
STOP key. No audible signal is given.

The following malfunction codes may occur at power-on:

E900 - Fig. 23

Unknown machine model.

E901 - Fig. 24

The machine is not calibrated.

E89 - Fig. 25

A key is jammed at power-on.

D Find and release the jammed key, call service if necess-

ary.

H82 - Fig. 26

The self-test was disturbed (e.g. by rotating the wheel).
The message is displayed for 3 seconds, after which the
measurement is repeated (max. 10 times), or aborted by press­ing the STOP key.

14

27

E3 - Fig. 27

Distance gauge arm is not in home position.

D Move gauge arm to its home position. Press the STOP

key to continue.

Operation manual geodyna 2350 - 9413 126

Turning on the machine

28

29

E92 - Fig. 28

During the second attempt the distance gauge arm was still not
in the home position. The gauge arm is rendered inoperative.

D Wait 3 seconds, or press the STOP key to continue.

E145 - Fig. 29

The contents of both permanent memories are different (but
both contain valid data).

Fatal error codes

The self-test program has detected an error and displays an al­phanumeric code consisting of six digits and/or letters.

30

31

32

Note

The displayed error codes refer only to the internal line voltage
of the machine.

C10 800 - Fig. 30

Line voltage too low. Balancing is feasible if the motor can drive
the main shaft to the measuring speed. Wheel data may be lost.

D Connect the machine to 110-125 V AC.

C10 801 - Fig. 31

Line voltage too high. Damage to the electronic unit of the ma­chine is likely!

D Turn off machine immediately.

Damage is not covered under warranty.

C10 804 - Fig. 32

Line voltage too high. Damage to the electronic unit of the ma­chine is likely!

D Turn off machine immediately.

Damage is not covered under warranty.

Operation manual geodyna 2350 - 9413 126

15

Clamping the wheel

6. Clamping the wheel

6.1 Fitting the wheel adapter on the main shaft

33.1

33.2

1 2 3

1

2

Fig. 33 Fitting the wheel adapter

33.1 MZV-4 cone adapter for rims with center bore loca-

tion, or at least sufficiently accurate center bore. Vari­ous accessories are available for this wheel adapter.

33.2 Adapters for closed rims, or for stud hole located rims.

Various accessories are available for this wheel
adapter.

1 Cone of the main shaft

3

2 Basic body of the wheel adapter
3 Fastening screw (width across flats 14 mm)

D Before fitting the wheel adapter clean the cone of the

main shaft (Fig. 33, item 1) and the inner cone of the
wheel adapter.

D Slide the wheel adapter onto the cone of the main shaft

so that the head of the hexagon socket head cap screw
attached to the end of the cone engages with one of the
recesses in the basic body of the adapter (Fig. 33,
item 2).

D Tighten the wheel adapter using the fastening screw

(Fig. 33, item 3).

33

6.2 Performing a compensation run

All clamping and centring means are balanced in our works to
within a certain tolerance.

To compensate for any residual unbalance that might be left in
the clamping means, it is recommended that an electrical com­pensation run be performed (also see § 10. Changing modes of
operation). This mode cannot be transferred into the perma­nent memory.

This mode of operation is retained until deleted via code C4, by
starting an Pro-Match run or readjustment, or by switching off
the machine.

D Press and hold the CODE key (Fig. 15, item 6) and rotate

the main shaft to set C4 in the display.

D Press the START key.

The compensation run takes longer than a regular measuring
run. Once the compensation run is completed, C4 is read out in
the left display, 1 is read out in the right display, and the symbol
for compensation (Fig. 18, item 5) lights up.

When another clamping means is used:

D Repeat the compensation run

or

D Cancel compensation by pressing and holding the FINE

key (Fig. 16b, item 11) and rotating the wheel, or by
switching the machine of for a few seconds.

16

In the right display, 0 is read out.

Operation manual geodyna 2350 - 9413 126

Clamping the wheel

34

6.3 Clamping car and light-truck wheels

Fig. 34 Cone adapter to clamp center bore located wheels

1 Cone
2 Rim
3 Clamping head with clamping nut

12 3

35

1

2

Fig. 35 Universal clamping adapter for clamping stud hole lo-

cated wheels or wheels with closed rim.

1 Rim with center bore (center bore location)
2 Closed rim

Operation manual geodyna 2350 - 9413 126

17

Entry of balancing mode and wheel size

+-

1

36

32

7. Entry of balancing mode and wheel

size

For determination of unbalance the following inputs have to be
made:

- balancing mode (weight fitting position on rim)

- wheel size (wheel width and diameter)

- distance between machine and left correction plane

The wheel dimensions to be entered are usually given on the
rim. Rim diameter is also given on the tire.

Rim width and diameter are always entered by pressing and
holding the relativefunction key (Fig. 36, item2 or 3) and rotat­ing the wheel until the desired value is read out. On releasing
the function key the input is retained until anotherinput is made.

The distance between left correction plane and machine is
usually entered using the integrated gauge arm, but may also
be entered by pressing and holding the function key for dis­tance (Fig. 36, item 1) and rotating the wheel until the desired
value is read out. On releasing the function key the input is re­tained until another input is made.

18

Operation manual geodyna 2350 - 9413 126

Entry of balancing mode and wheel size

2

1

12 12 2 2

1
2

2

7.1 Balancing modes

The use of different types on a standard (alloy) wheel and the
resulting different fitting positions of the weights on the rim pro­duce differences between the rim data which have been en­tered and the actual correction dimensions.

Fig. 37 Possible positions of the balance weights

- nominal rim data/actual correction data

1 Nominal rim dimensions to be entered
2 Actual correction data (center of gravity of weights) which

are used for determination of unbalance

The mode chosen is read out on the display, showing the rela­tive rim symbol (Fig. 38), or on the digital displays when the
ALU key is pressed (reading e. g. Alu 1).

37

D Press and hold the ALU key (Fig. 38, item 1) and rotate

the wheel to set the desired balancing mode (weight fit­ting positions - Fig. 38).

D Release the ALU key as soon as the desired mode is

read out.

Fig. 38 Rim symbols showing weight fitting positions

nor. Standard balancing mode where hammer-on weights

are attached to the rim flanges - always set when the
machine is turned on.

1

-

nor.

Alu 1

Alu 2, Alu 2P

Alu 3, Alu 3P

+

Alu 1 Fitting of adhesive weights to the bead seats

Alu 2 Adhesive weights - hidden adhesive weight attached
(Alu 2P) in the rim so as not to impair the decorative appear-

ance of alloy wheels or to balance PAX wheels

Alu 3 Hammer-on weight on left rim flange, adhesive weight
(Alu 3P) attached in hidden position in the rim disc

Alu 4 Hammer-on weight on left rim flange, adhesive weight

attached to right bead seat

Alu 5 Hammer-on weight on right rim flange, adhesive

weight attached to left bead seat

38

ALU

Alu 4

Alu 5

Operation manual geodyna 2350 - 9413 126

19

Entry of balancing mode and wheel size

+-

7.2 Input of wheel dimensions for the standard

balancing mode

If several wheels with identical wheel size are balanced in suc­cession, it is only necessary to enter the data for the first wheel.
It will remain stored until new entries are made.

39

1

.

ALU

7.2.1 Determination and input of rim width

Use the rim width callipers (Fig. 40) .

Fig. 39 Input of rim width

D To enter the rim width, press and hold the relative func-

tion key (Fig. 39, item 1).

D Rotate the wheel while the key is pressed in order to set

the value for the rim width on the display, and then re­lease the key.

7.2.2 Determination and input of wheel diameter

D Note the wheel diameter on the rim or tire.

D To enter the wheel diameter, press and hold the function

key (Fig. 41, item 1).

D Rotate the wheel while the key is pressed in order to

enter the diameter.
Having made the input release the function key.

40

41

+-

1

.

ALU

.

20

Operation manual geodyna 2350 - 9413 126