10
ACORN 80 Maintenance & Service Manual
SECTION 2
Description Of Operation
2.2.1 Vertical Bends
2.2.2 Horizontal Bends
Vertical bends connect horizontal and sloping rails (R). When the carriage moves over vertical bends the levelling
motor (L) adjusts the frame to maintain the seat in an upright position. All side rollers (S) on both bogies are
mechanically adjusted to remain horizontal with the rail. An anti-tilt mechanism (A) prevents the carriage from
tipping excessively in the event of a levelling failure.
When the carriage moves around helical bends, both levelling and pivoting operations occur at the same time.
Carriage speed is decreased when traversing vertical bends, inside horizontal bends and helical bends. The speed
sequence is programmed during installation. If battery power is lost the datum setting must be re-programmed.
The carriage has a “soft” start and stop feature.
Horizontal bends connect horizontal rails (R) at
90˚ to each other. When the carriage moves
around horizontal bends the power bogie (PB)
and levelling bogie (LB) pivot in the frame as
the carriage moves around the bend.