Static Balancing - Corghi ProLine 640 Manuel D'utilisation

the second side of the wheel.
- Perform a test wheel spin to check the
balancing accuracy. If it is not satisfac-
tory, modify the value and position of
the weights previously applied.
Bear in mind that a counterweight position-
ing error of just a few degrees may lead to
a residual unbalance as large as 5-10 grams
during the verification phase, especially in
the case of large unbalances.
WARNING
Check that the system which fits the weight
to the rim is in optimum condition.
A weight which is not fitted properly or cor-
rectly may come off as the wheel rotates,
thus creating a potential danger.
If the key is pressed whilst the
wheel is rotating, the spin will be prema-
turely interrupted.

Static balancing

A wheel can be balanced using a single
counterweight on one of its two sides or in
the centre of the well. In this case, the wheel
is balanced statically. However, there is
still the risk of dynamic unbalance, which
becomes more significant as the width of
the wheel increases.
- Press the
the LED corresponding to the STATIC
programme illuminates;
- press the button to confirm selec-
tion;
- set the wheel diameter value (in static
mode it is not necessary to enter the
width and distance values);
- spin the wheel by lowering the guard;
- wait for the wheel to stop automatically
52
and keys until
and for the calculated static unbalance
value to be displayed;
- rotate the wheel until the central element
of the position indicator lights up;
- apply the balancing weight in the 12
o'clock position on either the outer or
inner side, or at the centre of the rim well,
indifferently. If applied in the well, the
weight is applied on a diameter smaller
than the rated diameter of the rim. A
value of 2 or 3 inches less than the rated
value must therefore be entered when
the diameter is set in order to obtain
correct results;
- follow the instructions specified in the
dynamic balancing procedure to perform
a test wheel spin.
Alloy wheel balancing (ALU)
Self-adhesive weights are generally used
to balance alloy wheels and are applied
differently than for standard balancing
(Fig. 12).
Several ALU balancing programmes are
available, specially designed for these
types of rim.
ALU programmes can be selected as fol-
lows:
- Press the
LED corresponding to the ALU pro-
gramme illuminates.
- Press the
essary to confirm selection of the Alu
programme desired (the corresponding
balancing planes are highlighted on the
rim shown on the control panel).
User manual ProLine 640
12
keys until the
key as often as nec-