JLG 80SL, Service Maintenance Manual

Page: 111 / 162

SECTION 5 - JLG CONTROL SYSTEM
3121325 – JLG Lift – 5-5
5.3 NIVOLUX - AUTOMATIC SELF-LEVELING SYSTEM
Introduction
Normally the operation of leveling the chassis on a Mobile
Elevating Work Platform (MEWP) is very time consuming.
The Liftlux NIVOLUX automatic self-leveling system elimi-
nates this additional time, as it is a feature, when selected,
of the normal lift and lowering operation. The estimated
time saved over conventional systems can be in excess of
60%.
The System
A pair of angle sensors located inside the Main Terminal
Box (MTB) senses the chassis angle of the MEWP. As indi-
cated on the MTB decal, the inclination of the longitudinal
axis is designated "Y" and the lateral axis is designated
"X." The leveling function is achieved by hydraulic outrig-
ger cylinders mounted at each corner of the chassis.
Switches mounted on the top of each outrigger cylinder
sense outrigger ground contact. The system is controlled
by an electronic circuit board mounted in the MTB.
• The NIVOLUX automatic self-leveling system on JLG
MEWPs is a selectable system.
• Deployment of the outriggers is necessary to achieve
the maximum platform height.
• The system is intended for use when the machine is
positioned on uneven ground.
• The system, when selected, operates automatically in
conjunction with the control console when connected
to either the platform, or chassis position. It does not
operate in conjunction with the ground control station.
Operation
• The activation of the NIVOLUX self-leveling system is
part of the lifting process. The system starts the level-
ing function when the lifting function is operated and
the outrigger mode is selected. By activating the lifting
function via the controller (joystick), the automatic
measuring system is powered up, the drive function is
blocked and the control LED’s on the MTB indicate the
chassis tilt attitude.
• The leveling process starts by powering the lowest out-
rigger until the difference of the measured angle to set
point is less than 0.5°. The next lowest outrigger is then
powered to level one axis within 0.5°.
• This process continues until both axes are within 0.5°.
(i.e. the chassis is level)
Figure 5-3. Nivolux Control Board