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1. Select either ALU1P or ALU2P before starting.
by selecting the ALU 1P Balancing programme
icon or the ALU 2P Balancing programme icon.
The mask for measuring the unbalance on alloy
rims is displayed.
2. Perform the wheel balancing procedure as
described in the chapter "ALU1P, ALU2P
Programmes", but without applying the outer
weight.
3. Select the Hidden weight icon. If the wheel
is balanced on the outer side, the machine
displays the message shown in Fig. 24b on
the screen.
Fig. 24 Hidden Weights: procedure error
If there is an unbalance on the outer side (Pe) the
machine will display the graphic that indicates
the selection of the P1 weight position.
Press at any time to exit the "Hidden Weights"
programme
4. To make work easier mark the position of the
unbalance Pe on the tyre. To do this, move the
wheel to a centred position and make a chalk
mark at 6 o'clock if the "LASER" configuration
is active and at 12 o'clock if the "H12" or "CLIP"
configuration is active.
5. Turn the wheel to the position in which you
wish to apply the first outer weight (P1) and
press to confirm.
To select the exact position of the weight P1
relative to the Pe unbalance, use 6 o'clock as
the reference if the "LASER" configuration is
active and 12 o'clock if the "H12" or "CLIP"
configuration is active.
The angle between P1 and Pe must be less
than 120°.
6. If the angle selected is greater than 120°, the
machine displays the message shown in Fig.
24b for approximately 3 seconds to indicate
that another position must be chosen. If,
however, the angle selected is less than 120°,
the machine displays a graph indicating the
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24
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selected position for the weight P2, allowing the
process to continue to the next step
7. Turn the wheel to the position in which you
wish to apply the second outer weight (P2) and
press to confirm.
To select the exact position of the weight P2
with respect to the Pe unbalance, use 6 o'clock
as the reference if the "LASER" configuration
is active and 12 o'clock if the "H12" or "CLIP"
configuration is active.
The angle between P1 and P2 must be less than
120° and must include the outer weight Pe.
8. If the angle selected is greater than 120°, the
machine displays Fig. 24b for approx. 3 seconds
indicating that the procedure of step 7 must be
repeated correctly. If the angle selected is less
than 120°, the machine immediately displays
the value of the two outer weights P1 and P2
on the screen.
9. Move the wheel to a centred position (P1 or P2).
10. The brake intervenes automatically in the
centred position, then apply the balancing
weight indicated on the monitor as described
in the chapter "ALU1P, ALU2P Programmes".
11. Move the wheel to a centred position (P1
or P2).
12. Repeat the operations in step 10.
13. Once the Hidden Weights programme pro-
cedure is complete, you may continue working
with any other programme.
Standard ALU Programmes
(ALU 1, 2, 3, 4, 5)
Standard ALU programmes take into account
the different possibilities of weight application
(fig. 25)
EM 9580 - Operator's manual
25
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