Glossary - Corghi EM9980 TouchlessLine Betriebsanleitung

GLOSSARY

Here is
a brief description of some technical
terms used in this manual.
UNBALANCE CALIBRATION
This procedure calculates suitable correction
coefficients starting from known operating con-
ditions. It improves the machine accuracy by
correcting to a certain extent the calculation er-
rors that may result from the alteration of the
machine's features over the course of time.
CENTRING
Procedure for positioning the wheel on the
wheel balancer shaft to ensure that the shaft
axis corresponds 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 inserted on the wheel balancer shaft, is
used to centre the wheels having central holes
with a diameter ranging between maximum and
minimum values.
RUNOUT
This is represented by a sinusoidal wave form
having a specific width, which indicates geo-
metric deformations in the radial direction.
Since tyres and rims are never perfectly round,
there is always a certain amount of runout (or
radial runout first harmonic) for the wheel (or
assembly). If the runout width is greater than
a specified threshold, vibrations may be gen-
erating while driving the vehicle even after an
accurate balancing was performed.
The speed at which these vibrations may be
generated depends on the structural features
of the vehicle. Generally speaking, this (critical)
speed is about 120-130 Km/h for common pas-
senger vehicles.
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
74
of the unbalance, by applying only one weight,
usually 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 bal-
ancer rests. Also used for keeping the wheel
perfectly perpendicular to its rotation axis.
FLANGE (adapter - centring accessory)
Device for supporting and centring the wheel.
Also used for keeping the wheel perfectly per-
pendicular to its rotation axis.
It is mounted on the wheel balancer shaft.
LOCKING DEVICE
Wheel clamping device on the wheel balancer
only used for versions with the automatic wheel
clamping system.
ICON
Symbol displayed on the screen illustrating a
button, indicating the graphic representation of
a control.
SPIN
Procedure starting from the action that causes
the wheel to rotate and the subsequent rota-
tion of the wheel.
OPT
Optimisation abbreviation.
ROD
Acronym of Run Out Detection.
RPA
Acronym of Ricerca Posizione Automatica (Au-
tomatic Position Search).
RUNOUT
Indicates the non-perfect radial and/or lateral
geometry of the wheel.
WOBBLE
It is represented by a sinusoidal wave form hav-
ing a specific width, which indicates geometri-
cal deformations in the rotation axis direction.
Wobble (lateral runout first harmonic) may de-
pend on the fact that the tyre or rim is subject to
wear or geometric-mechanical deformations, or
the wheel (or assembly) has not been mounted
EM9980 TouchlessLine - Operator's manual