Hofmann geodyna 2600 User manual

28002600
geodyna 2600
Operation manual Car wheel balancer
Form ZEEWB703D

2 Operation manual geodyna 2600 EEWB703D
Contents •Safety rules and function
Contents Page
1. Safety rules and function 2
2. Installation of the machine 5
3. Electrical connection 6
4. Controls and displays 7
5. Turning on the machine 13
6. Clamping the wheel 15
7. Entry of balancing mode and wheel size 17
8. Balancing the wheel 27
9. Hidden spoke placement 31
10. Changing modes of operation 33
11. Error codes 40
12. Pro-Match / weight minimisation 46
13. User calibration 57
14. Maintenance 58
15. Technical data 58
16. Electrical diagram 59
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:
•signals the operator where to act.
Safety rules are highlighted in grey.
Arrow showing where to look
1.2 Scope of application
The off-the-vehicle wheel balancer is designed for static and/
or dynamic balancing of car and light-truck wheels weighing
up to 150 lbs and having an overall diameter of 44”.
In addition to conventional balancing operations, irregular run-
ning conditions of the wheel caused by geometric deforma-
tions of the rims and/or tires, hence unsmooth ride, can be
identied, 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.

1.3 General safety rules
Only properly trained and authorised personnel shall be al-
lowed to operate the wheel balancer.
The machine must not be used except for the scope of ap-
plication and in the way specied in this manual.
Unauthorized changes and modications to the machine
relieve the manufacturer 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 tting of
a plug or changing of connections, if necessary, must be car-
ried out by a qualied 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 behavior.
The following special points should be observed:
Use technical equipment for its specied 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.
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Safety rules and function
Fig. 1 View wheel balancer
Front view
1 Weight tray
2 Display and key pad
3 Wheel guard
4 Gauge arm for distance rim/machine and rim diameter
5 Pedal for main shaft lock
6 Rear view
Operation manual geodyna 2600 EEWB703D 3

4 Operation manual geodyna 2600 EEWB703D
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.
Gauge arm for distance and rim diameter
Entry of rim diameter and distance between left correction
plane and machine is by means of an integrated gauge arm
or also via the key pad. In the latter case the relative function
key is held pressed while the wheel is rotated to choose the
desired inputs and enter them by releasing the function key.
When tting adhesive weights with the weight holder, the
machine will support the operator in relocating the correction
position.
Rim width is entered via the menu keys and rotation of the
wheel.
Balancing mode
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, motorcycle, 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 the
machine stops automatically and the wheel is slowed down
to standstill. Amounts and locations of unbalance are read out
separately for each correction plane. Main shaft lock
The machines have a pedal-operated main shaft lock which
is used to retain the wheel in the correction position so that
the balance weights can be tted. This lock is designed only
to facilitate orientation of the wheel and must not be used for
braking the main shaft. Store wheel proles
Wheel proles 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
proles.
Error codes
Errors in operation or failures in the electronic or mechanical
system are signalled via respective error codes (see § 11.
Error codes).
User calibration
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 insufcient measurement ac-
curacy.
In such case the operator has the possibility of readjusting the
machine (see § 13. User calibration). Wheel guard
A wheel guard with electric interlocking is mandatory for the
European Union and is part of the standard equipment. The
measuring run may only be started with closed guard. The
electronic unit can be programmed via code C13 so that mea-
surement is started by closing of the guard.

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Installation of the machine
2. Installation of the machine
When choosing the site, Health and Safety at Work regula-
tions and the regulations on working environment should be
taken into account.
The wheel balancer can be installed on any rm and level
ground. For the weight and space requirement of the machines
refer to § 15., Technical data. For installation on an upper oor,
observe permissible load capacity of the oor.
It is recommended, though not absolutely necessary, that the
machine be secured to the oor. For this purpose three holes
(Fig. 2) are provided in the base of the machine by which the
latter is xed on the oor 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 oor and machine
base.
For ease of transport the wheel balancer is disassembled
into the following units and provided with special packing (on
pallets):
- Machine
- Wheel guard
2.1 Unpacking the machine
The machine should be unpacked by two persons.
Note
When unpacking the machine make sure that the pedal tted
on the machine base and the whole pedal assembly is not
damaged.
•Cut the strips of the packing (Fig. 3, item 1), lift off the
packing, and set aside the wheel guard and the small
parts packed in the separate small box (Fig. 3, item 2).
• Unscrew the three hexagon screws (use a 1/2 ” wrench
to) which hold the machine on the pallet (Fig. 4, ar-
row).
•Lift the machine by tube of the vibratory system and
wheel guard arbor and turn around by 180 degrees on
the pallet (Fig. 4).
•Then lower one side of the machine laterally on the
oor (Fig. 5).
•Remove the pallet from underneath the machine and
gently lower the entire machine onto the oor (Fig. 6).
2.2 Resiting the machine
If the machine is transported on site, gently tilt it, taking it by
weight box and wheel guard arbor, and push it gently on suit-
able lifting or mobile industrial handling equipment (e. g. forklift
truck, platform truck).
Note
When lifting the machine bear in mind the centre of gravity of
the machine and avoid oscillating movements.
Operation manual geodyna 2600 EEWB703D 5

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6 Operation manual geodyna 2600 EEWB703D
In general any work on the electrical system such as tting of
a plug or changing of connections, if necessary, must be
carried out by a qualied electrician in line with relevant
national standards and the regulations of the local power
station.
Installation of the machine
2.2 Mounting the wheel guard (Fig. 7)
•
Slide the wheel guard (Fig. 7, item 1) on the arbor
(Fig. 7, item 2) and raise it until the fastening holes of
wheel guard and wheel guard arbor coincide.
•Insert the M10 setscrew (Fig. 7, item 3) with washer
(Fig. 7, item 4) from below, and tighten the hexagon
nut (Fig. 7, item 5) and washer.
The wheel guard inuences the following modes of op-
eration:
- 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 permanent-
ly, or only as long as the machine is switched on, by means of
codes (see § 10. Changing modes of operation).
3. Electrical connection
Electrical standard equipment and drive motor of the wheel
balancer are provided for operation on 50/60 Hz, 115-120 V.
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.

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Controls and displays
4. Controls and displays
Fig. 8 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 automatically
and the former state is re-established. 3 Function keys
(see Fig. 9 to 11)
4 Display (see Fig. 12 to 15)
Fig. 9 Function keys on the left
1 Function key for distance rim / machine
2 Function key for rim width
3 Function key for rim diameter
Fig. 10 Function keys in the center
4 PRO MATCH
- Starts an optimisation program (LED PRO MATCH
lights).
- In the Pro-Match program (OP program): enter valve
position.
5 CLEAR/RESTORE
CLEAR (key pressed briey): Setting the factory adjusted
modes of operation. All settings are deleted and the
display 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 briey): Sets the machine in
the user calibration mode (see § 13. User calibration). CODE
(key pressed for 3 seconds): Switches to changing
modes of operation.
7 G/OZ
Switches over the weight unit for unbalance readings
(grammes or ounces).
GReadings in grammes Oz
Readings in ounces
When the machine is switched on the weight unit set with
code C3 is active.
Operation manual geodyna 2600 EEWB703D 7

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8 Operation manual geodyna 2600 EEWB703D
Controls and displays
Fig. 11a Function keys on the right
8 ALU/ALU+ toggle key (ALU key) for balancing modes.
ALU (key pressed on top):
Toggles through theALU 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 gauge arm for distance and rim diameter
to measure rst 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 balanc- ing 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 proles. 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 rst wheel prole to
be stored.
Keep the key pressed on bottom and rotate the wheel.
Proles 2 through 4 are read out in the right-hand dis-
play. The stored wheel prole is entered once the key
is released.
STO: If a wheel prole is to be stored, keep on press-
ing 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 # 1 through 4 can be set in
the right-hand display by rotating the wheel. The cur-
rent prole is stored once the key is
released.
10 RV-S/D
RV (key pressed on top):
Changes the ne 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).

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Controls and displays
Fig. 11b 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 bal-
ancing mode Alu 1 to Alu 5 is selected, press and hold
the FINE key and then press the function key for balanc-
ing mode (ALU, ALU+). The unbalance readings switch
over to those for standard balancing mode and the rela-
tive 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 specied on the tire has to be entered by pressing
the diameter key and rotating the wheel.
Readout display changes to single-plane. Both loca-
tion 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.
Operation manual geodyna 2600 EEWB703D 9

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inch mm
ALU
FINE
INT
PROMATCH
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RV-LIGHT TRUCK
ALU
FINE
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PROMATCH
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RV-LIGHT TRUCK
CALIBRATE
SPOKE
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SPOKE
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Controls and displays
Fig.12 Display panel - left section
1 Direction indicator of left correction plane
2 Indicates when correction position in the left
correction plane has been reached.
3 Inch/mm
The unit of measurement (inch or mm) is chosen by using
the rim width key .
4 Rim width Symbol
Lights whenever width key is pressed.
5 Digital Display for left correction plane to show:
- rim width
- 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 proles
Note: Error codes are read out in both digital displays.
Fig. 13 Status LEDs
1 ALU: Any ALU balance mode is selected
2 FINE: FINE key is pressed (cancels supression of small
imbalances). Display changes to normal resolution as
soon as key is released.
3 INT: Patch Balance is selected. All special functions
(including FINE) are inactive and cannot be selected.
4 PRO MATCH is selected.
5 = 0 Compensation run has been carried out
6 RV/LIGHT TRUCK resolution is selected.
7 CALIBRATE: Operator calibration mode is entered or
programmable 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
selected.
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.