COD.642400 Rev. 1
12
WHEEL BALANCING
Switch on the machine with the main switch (see fig. 1 and fig. 2 on pg. 4).
• The displays (fig. 16) read "O". Close the wheel protector guard and push the START button (9, fig.
16) to start the measuring cycle.
• After starting the read-outs disappear with the exception of a central segment of the display.
• The degree and location of the imbalance are measured simultaneously and are displayed
separately.
• When the measurements are complete the wheel brakes automatically until it stops.
• The wheel guard must not be opened before stopping. In an emergency the STOP button (8, fig. 16)
shuts down the machine.
• The LED arrows (10, fig. 16) indicate the direction in which the wheel has to be rotated to reach the
position for balancing (separate arrows for each side of the wheel).
• The wheel has to be rotated by hand until the LED (11, fig. 16) lights up.
• Next the balancing weight required is fixed on the respective sides of the wheel in a top
perpendicular position (at 12 o'clock) on the main axle.
• After fixing the counter-weights in the compensating positions, start the machine to check that the
wheel balance has been corrected.
WHEEL BALANCING CHECKS
Two check procedures are required to ensure that the balancing procedure is carried out perfectly.
CHECKING THE CORRECT FUNCTIONING OF THE BALANCING PROCEDURE.
• The two sides of a wheel are balanced according to the instructions.
• Then an imbalance is artificially created by adding a 50g weight on one of the two sides. The
machine should now indicate exactly this imbalance giving both the weight and the position.
• There might also be a reading for the other side to a max. 5g.
• To check the imbalance indicator LED the wheel is rotated until the imbalance position is reached
and indicated by the machine. In this position the test weight should be positioned vertically under
the axle (at 6 o'clock).
• If there is a clearly visible angular deviation then the indicator LEDs have to be corrected.
• If there is an unacceptable deviation for the readings on the side of the wheel with the test weight, or
if the imbalance indicated for the other side is excessive, then the machine has to be re-calibrated.
CENTRING PRECISION (balancing quality)
For this test the same wheel balanced in the previous test procedure can be used.
• Remove the test weight. Then release the wheel from the adapting device, rotate it about 35° and
then re-lock it.
• In a test cycle the reading should not exceed a max. imbalance of 10g on each side (15g in the case
of particularly heavy wheels). This error is due to the rim centring tolerance.
• Precise centring is essential both for this test and for normal balancing procedures.
• If a large imbalance emerges from this test it is necessary to check for excessive wear, for play, or for
dirt in the parts used to centre the wheel.
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