COD.642400 Rev. 1
17
IMBALANCE OPTIMIZATION
To start the imbalance reduction process press the ALU key repeatedly until the left display reads "oPt".
Press the E key to enter optimization: the display "oPt 1" appears.
Stage1: Press the START key for the first test run with the wheel to be optimized: at the end of the run the
display reads "oPt 2".
Stage 2: Turn the wheel by hand and move the valve to a 12 o'clock position. With the wheel in this
position, press the E key to memorize the reference position of the wheel for the first test run. Now the
display reads "oPt 3". Mark a reference point on the tyre at the valve position.
Stage 3: Remove the rim from the flange and rotate the tyre on the rim 180 dgrees (the mark made
previously can be used - move it to the position exactly opposite the valve).
Remount the rim on the flange and reposition the valve at 12 o'clock. Keeping the wheel in this position,
press the E key to memorize the new position of the rim on the flange: the display now reads "oPt 4".
Stage 4: Press the START key to run another cycle. At the end of the cycle the display reads"oPt 5".
Important: to get the best possible results from the imbalance reduction process, it is necessary to carry
out the above operations with the utmost precision.
When the STOP key is pressed at the end of the second run, the following information is given:
- left display: figures for the present static imbalance of the
wheel;
- right display: figures for the minimum residual imbalance that
it is possible to obtain with the recommended imbalance
reduction.
These figures are useful for deciding whether it it worthwhile going on with the imbalance reduction process
(for the same reason, after the first run it is possible, by pressing the STOP key, to read the static
imbalance of the wheel on the left display inorder to check whether it is really worthwhile continuing with
the reduction operations).
Stage 5: To continue the imbalance reduction process, rotate the wheel by hand until the positioning led's
on the display move to the centre, and mark the tyre at the top point (in the position where a weight is
normally fixed). To reduce the imbalance, remove the rim from the flange and rotate the tyre on the rim until
the new mark coincides with the valve.
Refit the rim to the flange and position the valve at 12 o'clock. Holding the wheel still in this position, press
the E key to memorize the new position of the rim on the flange: the display now reads "oPt 6".
Stage 6: Press the START key for a test run. At the end of the test run the wheel imbalance is
automatically compared with the figures of minimum residual imbalance. If the diference between these two
figures is less than the maximum permitted tolerance, the display shows "oPt yES". Pressing the STOP
key it is also possible to display the new static imbalance figures in order to check the effectiveness of the
operation just carried out.
Stage 7: If the first reduction is not satisfactory, the display shows "oPt 7". In this case it is possible
continue the reduction process by repeating the operations starting from stage 5.
When it is no longer possible to further reduce the imballance the process ends:
- if the operation has been completed sucessfully and the display shows oPt yES;
- if it has not been successful the display shows oPt Err, indicating that it is necessary to repeat the entire
procedure from the beginning.
At the end of the optimization process, press the E key to return to measurement of wheel imbalance. The
display reads "0 0".
Pressing the ALU key at any time interrupts the imbalance reduction process and the system returns to
measuring wheel imbalance.
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