ET 66 - ET 66 M operator’s manual
BALANCING PROGRAMS
Before starting a balancing cycle:
- mount the wheel on the shaft using the appropriate flange;
- remove any balancing weights, stones, dirt or other foreign bodies from the wheel;
- input wheel data correctly.
Dynamic balancing (standard)
- Press the keys until the LED next to DYN lights.
- Press
to confirm the selection
This is the default balancing mode when the machine is switched on.
- Input the wheel data correctly.
- Spin the wheel.
For best balancing results do not subject the machine to mechanical stress while it
is processing the unbalance signals.
- Wait until the wheel is automatically braked and displays A and B (fig.9) will show the
unbalance values for the inside and outside of the wheel respectively.
- Choose the side you intend to balance first.
- Disengaging the brake, place the wheel in the position signalled by the correspond-
ing indicator (C or D fig. 9).
- Brake the wheel by releasing the lever (E fig. 4), to facilitate subsequent application
of the balance weight.
- Fit the specified weight at the 12 o’clock position.
- Disengage the brake by lifting the lever.
- Repeat this process for the other side of the wheel.
- Make a test spin to check the accuracy of balancing. If you do not find it completely to
your satisfaction, change the amount of the weight and its position following the
suggestions given in the “balancing check diagram” (fig.14).
Don’t forget that especially when the unbalance is large, a slight error (a degree or
two) in positioning the balancing weight can produce high residual unbalance (5-10 g
for car wheels and 100 g for truck wheels).
Static balancing
A wheel can also be balanced with a single weight placed on one of its sides or at the
centre of the channel. This is known as static balancing. Some dynamic out-of-balance
may still be present (shimmy), and the wider the tyre, the more noticeable this will be.
- Press the
keys until the LED next to ST lights.
- Press
to confirm.
- Input the diameter (static balancing does not require width and distance data).
- Spin the wheel
- Wait until you hear the beep indicating that signal processing has been terminated
and then brake the wheel. The static unbalance value is shown on display B (fig.9).
- Place the wheel in the position signalled by indicator D fig.9, disengaging the brake.
- Brake the wheel by releasing the lever (E fig. 4) to facilitate subsequent application
of the balance weight.
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