EM 9250
Operator’s manual
135
UK
SPIN
Procedure starting from the action that causes the wheel to rotate and the subsequent
rotation of the wheel.
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.
OPT
Optimisation abbreviation.
RPA
Acronym of Ricerca Posizione Automatica (Automatic Position Search).
ULTRASONIC SENSOR
Electronic component that, together with the information collected by the internal 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.
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.