Hofmann Megaspin 800, Megaspin 800P Operating Instructions Manual
0055 - 1
ELECTRONIC MICROPROCESSOR WHEEL BALANCER
WITH THREE-DIMENSIONAL GRAPHIC VISUAL DISPLAY
UNIT FOR CAR, COMMERCIAL VEHICLE AND
MOTORCYCLE WHEELS
0055 - 1998.12
Operating instruction manual
Protection cover
Weight and accessories table
Automatic
width reading
gauge
Wheel balancer
chuck
Automatic distance + diameter
gauge
Parking and emergency
brake pedal
Pneumatic chuck lock
pedal
( Series A ) ( Series A )
Visual
display unit
Control
panel
Flange
stakes
HofmannIndustrial GmbH
A - 5302 Henndorf
Hauptstraße 59
Tel +43-6214-6466-12 \ Fax -22
2 - 0055
- WHEEL BALANCER EXPLODED DRAWINGS
- EC DECLARATION OF CONFORMITY
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
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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
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Fig. 2
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. 3
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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 Fig. 4A
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
A
B
A
B
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).
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4 - CONTROLS AND COMPONENTS
4.1 - BRAKE PEDAL
Fig. 5
Fig. 6
4.2 - PNEUMATIC LOCKING PEDAL (Model P)
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).
This enables the operator to hold the wheel fast during
counterweight fitting. This must not be operated
during the measurement cycle.
For releasing the wheel on the flange. Do not operate
during machine cycle and/or when flanges different to
standard-cone flanges are fitted.
0055 - 9
4.7 - KEYBOARD
Note: Only press the keys with fingers; do not use counterweight pliers or other
pointed tools.
Fig. 7
Function keys: for immediate selection of functions shown on screen
Special functions
selection
Confirm Measurement
cycle start
Machine cycle stop
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