SICE S 65 E Manual De Instrucciones página 137

perpendicular to its rotation axis.
Mounted on the shaft of the wheel balancer by means of the central bore.
FSP
Fast Selection Program acronym
LOCKING DEVICE
Wheel clamping device on the wheel balancer only used for versions with the automatic
wheel clamping system.
OPT
Optimisation abbreviation.
RING NUT
Wheel blocking device on the wheel balancer, fitted with elements for coupling with the
threaded hub and side pins for tightening it.
RPA
Acronym of Ricerca Posizione Automatica (Automatic Position Search).
SELF-CALIBRATION
This procedure calculates suitable correction coefficients starting from known operat-
ing conditions. It improves the machine accuracy by correcting to a certain extent the
calculation errors that may result from the alteration of the machine's features over the
course of time.
SENSOR (measuring arm)
Mobile mechanical element that, when brought into contact with the rim in a specific
position, measures the geometric data: distance, diameter. Data can be measured auto-
matically if the sensor is equipped with suitable measurement transducers.
SPIN
Procedure starting from the action that causes the wheel to rotate and the subsequent
rotation of the wheel.
STATIC BALANCING
Procedure for correcting only the static element 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.
THREADED HUB
Threaded part of the shaft on which the ring nut is engaged to lock the wheel. It is sup-
plied disassembled from the machine.
ULTRASONIC SENSOR
Electronic component that, together with the information collected by the internal meas-
uring sensor, makes it possible to measure the wheel width. This measurement is taken
by transmitting and receiving ultrasonic wave trains.
UNBALANCE
Uneven distribution of the wheel mass that generates centrifugal forces during rotation.
Operator's Manual S 65 E - S 65 E C 137