Glossary - SICE S 78 TOUCH Manuel D'instructions

for product disposal and improve the quality of life,
preventing potentially hazardous substances from
being released in the environment.
FIRE-EXTINGUISHING
MATERIALS TO BE USED
Consult the following table to choose the most
suitable fire extinguisher.
Dry materials
Water
Foam
Powder
CO2
Flammable liquids
Water
Foam
Powder
CO2
Electrical equipment
Water
Foam
Powder
CO2
YES** Use only if more appropriate extinguishers
are not at hand and when the fire is small.
WARNING
The indications in this table are of a general nature.
They are designed as a guideline for the user. The
applications of each type of extinguisher will be
illustrated fully by the respective manufacturers
on request.

GLOSSARY

Here is
a brief description of some technical
terms used in this manual.
UNBALANCE CALIBRATION
This procedure calculates suitable correction coef-
ficients starting from known operating conditions.
It improves the machine accuracy by correcting to
a certain extent the calculation errors that may re-
sult from the alteration of the machine's features
over the course of time.
74
YES
YES
YES*
YES*
NO
YES
YES
YES
NO
NO
YES
YES
CENTRING
Procedure for positioning the wheel on the wheel
balancer shaft to ensure that the shaft axis cor-
responds to the wheel rotation axis.
BALANCING CYCLE
Sequence of operations to be performed by the user
and the machine from the beginning of the spin
until the wheel is braked to a stop after calculating
the unbalance values.
CONE
Conical element with a central hole which, when in-
serted on the wheel balancer shaft, is used to cen-
tre the wheels having central holes with a diameter
ranging between maximum and minimum values.
RUNOUT
This is represented by a sinusoidal wave form hav-
ing a specific width, which indicates geometric de-
formations in the radial direction. Since tyres and
rims are never perfectly round, there is always a
certain amount of runout (or radial runout first har-
monic) for the wheel (or assembly). If the runout
width is greater than a specified threshold, vibra-
tions may be generating while driving the vehicle
even after an accurate balancing was performed.
The speed at which these vibrations may be gen-
erated depends on the structural features of the
vehicle. Generally speaking, this (critical) speed is
about 120-130 Km/h for common passenger vehi-
cles.
DYNAMIC BALANCING
Procedure for unbalance compensation by applying
two weights, one on each of the two wheel sides.
STATIC BALANCING
Procedure for correcting only the static element of
the unbalance, by applying only one weight, usual-
ly at the centre of the rim well. Accuracy increases
as the width of the wheel decreases.
RIM SUPPORT FLANGE
(of the wheel balancer)
Circular crown-shaped disk against which the disk
of the wheel mounted on the wheel balancer rests.
Also used for keeping the wheel perfectly perpen-
dicular to its rotation axis.
FLANGE (adapter - centring accessory)
Device for supporting and centring the wheel. Also
used for keeping the wheel perfectly perpendicular
to its rotation axis.
S78 Touch - Operator's manual