Nussbaum ATT BM Series Owner's manual

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Technical Instructions
BM Wheel Balancers – new generation from Oct 2010
Status: 27. August 2013

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Content:
1. Recommended spare parts list...................................................................................................4
2. General information on servicing machines..............................................................................4
3. Drive belt......................................................................................................................................5
4. Main switch..................................................................................................................................6
5. Motor ............................................................................................................................................8
6. Piezo sensors ..............................................................................................................................9
7. Opto encoder-printed circuit board..........................................................................................10
8. Motor control board...................................................................................................................11
9. Basic board................................................................................................................................13
10. Drive belt pulley.....................................................................................................................16
11. Wheel guard micro switch.....................................................................................................17
12. Potentiometers.......................................................................................................................18
13. Software update basic board ................................................................................................21
14. Software update Touch PC....................................................................................................25
15. Service Functions..................................................................................................................26
16. Mid centring device (NOT QuickSpan) .................................................................................34
17. QuickSpan..............................................................................................................................35
18. Foot pedal (QuickSpan).........................................................................................................36
19. Maintenance unit (QuickSpan)..............................................................................................37
20. Repair Instructions for clamping fingers (QuickSpan)........................................................38
21. Using UNI-LUG and Motorcycle adaptor on QuickSpan......................................................41
22. Trouble shooting and problem solving................................................................................47
23. Electrical schematic layout...................................................................................................51
24. Dimensions ............................................................................................................................53
25. Technical data........................................................................................................................54

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1. Recommended spare parts list
A suggested list of spare parts is recommended to be kept at the customer’s location in order to
rectify problems that might occur more quickly. A list below is also provided on our home page.
1987009WH7A POTENTIOMETER Distance + Diameter with cable
1987009WH9A POTENTIOMETER with cable for outside gauge
1987009WH4A Wheel guard switch
1987009WN3A FORK LIGHT SENSOR with cable
1987009WH2A TRANSDUCER SENSOR complete with cable
1987009WB7A MOTOR with brake
1987009WB5A MOTOR without brake for BM 11, 15 Touch, QuickSpan champ
1987009WD3A PRINTED-BOARD ASSEMBLY for BM 30-2, BM 40-2,
QuickSpan comfort, QuickSpan chrome
1987009WD3A PRINTED-BOARD ASSEMBLY for BM 11, QuickSpan champ
1987009WD2A PRINTED-BOARD ASSEMBLY for Touch PC
1987009WA7A Motor control unit complete for BM 11, 15 Touch
1987009WA8A Motor control unit complete for BM 30-2, 40-2, 35 Touch, 45 Touch,
all QuickSpan models
1987009W8MA Mid centering device QuickSpan complete
1987009W8LA Repair kit QuickSpan „Fingers“
1987009W8NA Repair kit pneumatic cylinder QuickSpan
2. General information on servicing machines
a) Repairs and servicing should only be carried out by qualified personnel.
b) Safety procedures:
Before opening the cover to the electronic parts switch off the main switch and remove the
electrical plug. Take special care not to touch the heat sink on the power control board of the
monitor machine versions because this holds a constant voltage of 230V, or 110V when the
machine is connected to the mains!
Never leave a machine unguarded, which has open electrics parts!
Before a machine is brought back into operation after repairs, ensure that no tools or components
are in contact with the rotating parts of the main shaft.
c) Make sure that a zero run and a calibration has been carried out every time after the machine
has been serviced or adjustments have been made to internal components!
d) Should components fitted to other parts e.g. the electronic boards become defective, do not try
to replace these yourself (except for fuses). If the machine is still in under warranty, the complete
board should be changed. A loss of warranty will occur if any alterations are made to individual
components!

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e) Use only original parts to avoid the problems arising from using parts not having the correct
technical specifications or which have no guarantee for this machine. Corresponding spare parts
can be found in the spare parts document as well as finding it on our home page.
3. Drive belt
a) In order to replace the drive belt, loosen four bolts (1- 4). Next, loosen the tension bolt (5) to
allow the motor to pivot towards the belt pulley. Take off the belt. Replace with a new belt being
careful to make sure that the belt is as close as possible to the main shaft assembly to allow it to
fit correctly onto the small drive pulley. Tighten the tension bolt (5) and then the four mounting
bolts (1-4). Make sure that the tension on the belt is sufficient to allow 1cm
b) The direction arrows on the drive belt have no role to play because the rotation of 150 rpm for
the main shaft is very low. Direction arrows can be ignored.
(Drive belt, Art.Nr. 1987009WK1A)
c) Noises coming from the belt do not affect the results on the machine. Do not use grease or oils
to lubricate otherwise the loss of friction on the pulley could alter the rotational speed of the main
shaft.

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4. Main switch
a) The main switch can be found on the left side of all machines. It can also be used as an
emergency off switch. Before any repairs are carried out to the machine please do not forget to:
DISCONNECT MAINS PLUG!
b) In order to remove the main switch, loosen the small screw as seen in the picture and pull on
the lever.
From the outside you will now see four screws on the cabinet wall, which secures the main body
of the switch. Loosen these screws to remove the element.

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The next picture shows the inside of the cabinet with the main body and two of the four screws.
On the main body are four electrical connections numbered 14 which are the in and out going
power lines to the main switch.
Contact 1 is the outer conductor and contact 3 is the Neutral wire which is connected to an earth
plug. Contact 2 is the inner conductor and is protected by fuse X1-F1. Contact 4 connects to the
neutral connection X1. (If in doubt, please check wiring diagram)

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5. Motor
a) Disconnect the red and black motor cable at the point (J2-2, J2-3). In addition if the machine is
a model (above BM30) also disconnect the two grey brake leads at the point (J4-2, X1-3).
b) Loosen the drive belt as described in Para. 5. Loosen the securing screws(1)
(4) to remove the motor. Place new motor in position and tighten the screws (1)-(4).
Replace the drive belt as described above and replace the electrical cables.
c) Note: When ordering new motors make sure that the correct motor for the specific kind of
machine is chosen.
DC motor (24V) without braking capability for BM11, BM 15 Touch and QuickSpan champ and a
DC motor (48V) with braking capabilities for all from BM 30 upwards.
Photo. Shows motor without brakes Photo. Shows motor with brakes
Art.Nr. 1987009WB5A Art.Nr. 1987009WB7A

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6. Piezo sensors
a) Disconnect the connecting lead J6 from the Basis board. Loosen the pies sensor securing nut
(1) and screw out the securing bolt (2) using an Allen key. Please note that on machines built from
August 2011 the screw of the sensor is secured inside the thread with Loctite
Look out for the four ball bearings (3) at either end of the piezo sensors. To replace the sensors,
first clean and then put a small dab of grease into the socket spaces for the ball bearings, clen the
thread from remaining Loctite, put medium type Loctite on the screw and place the Piezo sensor
gently into position.
Return each piezo sensor with the ball into position and screw on the sensor securing bolt making
sure that the ball is also in position. Tighten the securing bolt to 2Nm. Do not over tighten the
sensors and tighten the securing bolts alternately.
Replace the securing nut and finally re-connect the leads to the basis board at the point J6.
b) The piezo sensors always come as a set with balls and a single shared lead connecting to a
plug. They can be fitted in any position i.e. front, rear, left or right without any adverse affects on
results. After replacing the sensors, it is imperative that a zero run and calibration are carried out.
Photo shows Piezo sensors (Art.Nr. 1987009WH2A)

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7. Opto encoder-printed circuit board
a) There are three red light diodes on the opto encoder printed circuit board. When these three
light diodes are blinking during the operation of the machine, it means the opto encoder is
functioning. If the machine is switched on (CAREFUL VOLTAGE) and the main shaft is turned
slowly, the blinking of the diodes can be observed.
b) To remove, unplug the lead at J2 on the basis board. Loosen the securing screws (1) enabling
the metal support (2) with the opto encoder board to be withdrawn from the machine. Unscrew the
opto encoder board (3) from metal support and replace with another. Return metal support with
opto encoder into position and secure. The opto encoder board must not make any contact with
either the toothed disc (4) or the drive pulley (5). Finally re-connect the plug
c) Note: If a new opto encoder board has been fitted and the position for placing weights cannot
be found, then the actual angle of the opto encoder in relation to the toothed disc should be
checked. As seen in the upper picture, the sensor should be at 90° to the drive pulley
d) If you check the toothed disc, you will find a position where there is a small gap (See red arrow
in the picture above). This position is measured by the opto encoder as Zero point. The toothed
disc has 256 segments and by selecting function F9 on an LED machine you can see the number
of each segment as the main shaft is turned. With monitor machines, the same function can be
checked in the service screen reading from the bottom left of the screen. If the main shaft is
turned a complete revolution in a clock wise direction the scale will count from 0 to 255 and
likewise opposite in a counter clockwise direction.
5
4
3
2
1