656 234
2010-11-22
|
Sicam srl società unipersonale
46 | SBM V655 | Maintenance
en
11.3.5 Reference
measurement
i
Exact centering of the wheel is a basic prerequisite
for this reference measurement and for all balan-
cing operations.
i
Sound and automatic start are active in the following
description (refer to Section 7.3 ).
1.
Attach a motor vehicle wheel of medium size (e. g.
width 5.5", diameter 14") and in very good condition
to the flange.
2.
Enter the wheel data (refer to Section 8.2).
3.
Close the wheel guard.
Measurement commences.
4.
Create an artificial unbalance by attaching a test
weight of e. g. 60 g to one of the two sides.
5.
Close the wheel guard.
Measurement commences.
The SBM V655 must display precisely this unbalance
(value and position) on this side. The value indicated
for the other side must not exceed 5 g.
i
To check the position of the unbalance, turn the
wheel until the position recommended for attach-
ment of the balance weights is attained. The test
weight attached must be vertically beneath the axis
of rotation (6 o'clock position).
!
Calibration must be repeated in the following cases:
$
Deviation from specified unbalance value
(greater than 1 g on test weight side, more than
5 g on other side).
$
Deviation from specified unbalance position (test
weight not between 5:30 and 6:30 position).
6.
Remove the test weight.
7.
Release the wheel and turn it through approx. 35°.
8.
Re-attach the wheel.
9.
Close the wheel guard.
Measurement commences.
"
On completion of this reference measurement, the
display must not exceed a maximum unbalance of 10 g
per side (15 g for particularly heavy wheels). This error
may be caused by the rim centering tolerances. If this
reference measurement indicates greater unbalance,
the components used for centering the wheel must be
checked for wear, play and contamination.
11.4 Self-diagnosis
1.
This is called up from the "
main page
" by pressing
<
F5
> twice.
2.
Enter the password
F2 F5 F3
.
"
The following information is displayed:
Software version
Machine status
Page number
Values of all analog inputs (IN0, … , IN7)
Measured values for: Distance, width, diameter
Encoder increments
Inner pick-up value
Outer pick-up value
Phase difference (calculated)
Wheel guard safety switch status
Flange safety switch status
Inner weight and position
Outer weight and position
Calibration status
Data acquisition status
Calibration data
Number of balance shaft revolutions
Proceed as follows to check correct operation of the
pick-ups:
$
Clamp a test wheel which has already been
balanced.
$
Perform the test run after attaching a test weight
(e.g. 100 g Pb or 60 g Zn) to the outer side.
The check on the value determined after the test run
must yield an inner pick-up voltage value which is
always lower than that of the outer pick-up. The ratio
between the outer and inner pick-up value must be
between 1.7 and 2.3 and the phase difference must
be 180° ± 1°.
