MT 3350

12. UNBALANCE OPTIMISATION PROGRAMME

"OPT"

This procedure minimises any vibration still present on the vehicle while running even after accurate balancing, thus minimising the rim-tyre coupling run-out.

Based on our experiences, the programme can be recalled every time it is convenient to minimise the running noise produced by the vibrations mentioned above.

The calculations performed by this programme are based on the unbalance values measured during the last spin performed which must therefore refer to the wheel being serviced.

• Press the

• use the

• press the key.

keys to search for OPt key to activate the optimisation procedure

Programme activation is indicated by the illumination of the LED on the display panel.

OPERATING PHASES

OP.1 H.12

OP.2 180

- bring the valve to the "12 o'clock" position and press to confirm

- make a mark on the tyre 180° from the valve

- remove the wheel from the wheel balancer

- go to the tyre changer and move the mark made in correspondence with the valve

- press the key to confirm.

- remount the wheel on the wheel balancer

- move the valve to the 12 o'clock position

OP.3 H.12

- press the

OP.4 GO - perform a spin key to confirm

108 Operator's manual MT 3350

OP.5 II

- turn the wheel until it is in the position shown by the position indicators

- use chalk to make a double mark on the outer side of the tyre at the 12 o’clock position

Note: in this phase, press the key to display: the first time the key is pressed, the actual unbalance values of the wheel as currently mounted on the wheel balancer; the second time the key is pressed, the obtained unbalance value continuing with the last phase of the optimisation procedure with the improvement percentage; when the key is pressed for the third time, the machine prepares for the last phase of the OPT programme

- remove the wheel from the wheel balancer

- on the tyre changer, move the double mark made in correspondence with the valve

- press the cedure.

key to confirm and end the unbalance optimisation pro-

Notes:

- The unbalance optimisation procedure can be quit at any time by pressing the the displays will show the premature exit message:

key;

Press the key to exit or the key to stay in the programme.

- The following message could be displayed at the end of the first spin:

Out 2

In this case it is advisable to exit the programme by pressing the key: the values of the weights necessary for balancing the wheel are displayed. The programme execution is interrupted, thus not achieving the moderate improvement of the end results. By pressing the the optimisation procedure can be continued.

key

- At the end of the first spin the instruction that the tyre is to be mounted on the rim in the reverse direction may appear. If you do not intend to reverse the tyre or if doing so is impossible, press the key and the machine will provide the instructions for completing the programme without reversing the tyre.

Operator's manual MT 3350 109