Launch X-712, Руководство пользователя

Страница: 9 / 37

LAUNCH X-712 Wheel Aligner Introduction
1-3
Fig.1.6
Wheelbase Difference
Wheelbase difference is defined as the angle between
the joint line of the centre of two rear wheels and that of
the front wheels. It is positive when distance between
the centre of the right wheels is large than that of left
wheels; and negative otherwise. If the track width is
available from the vehicle specifications, then the
wheelbase difference can be also expressed by angle.
See Fig. 1.7
+
Fig. 1.7
Track width Difference
Track width difference is defined as the angle between
the joint line of the ground-contact point of left wheels
and that of the right wheels. It is positive when distance
between the centre of the rear wheels is large than that
of front wheels; and negative otherwise. If the
wheelbases are available from the vehicle specifications,
then the track width difference can be also expressed by
angle. See Fig. 1.8.
+
Fig. 1.8
Left (right) lateral offset angle
The relative offset in lateral direction between front axle
and rear axle of vehicle is axle offset. When rear wheel
axle is offset to right from the front wheel, the axle offset
is positive, otherwise is negative. The angle between the
bisector of the track width difference angle and the
thrust line is axle offset angle.
Axle offset angle
The relative offset in lateral direction between front and
rear axle of vehicle is axle offset. When LR (RR) wheel
is offset outside from LF (RF) wheel, the left (right)
lateral offset is positive, otherwise is negative. The angle
between the connecting line from the front wheel center
point to the rear wheel center point (same side) and the
thrust line is left (right) lateral offset.
Delay angle
The angle between the connecting line from the LF (LR)
wheel center point to the RF (RR) wheel center point
and the perpendicular of the longitudinal geometry
center line is called front (rear) delay angle. When the
right wheel on the front (rear) axle is behind the left
wheel, the front (rear) delay (angle) is positive,
otherwise is negative.
Included angle
The sum of the SAI (Steering axle inclination) and the
wheel camber is called included angle.
Functions and Features
z Complete test: The X-712 wheel aligner can be
used to measure the most wheel alignment
parameters, such as front wheel toe-in, front
wheel camber, caster, steering axle inclination,
thrust angle, rear wheel toe-in, rear wheel camber,
wheelbase difference, track width difference, etc.
z
Brand new 3D computer vision measurement:
automatically test the aligning angles with high