Controlled Angle; Swing Speed Proportioning; Stability - JLG 1200SJP Operation And Safety Manual

NOTE: Boom Control System in Automatic Mode: When the boom is
completely elevated along the edge of the backward stability
region and the telescope in function is activated, lift down will
automatically function until the boom is away from the edge of
the backward stability region.
Boom Control System in Manual Mode: The boom will stop when
the end of the envelope is reached and the operator must acti-
vate lift and/or telescope in the proper direction to bring the
boom back into the envelope.

Controlled Angle

The control system automatically maintains a constant elevated
boom angle when swinging the turntable. If the boom angle is at
30 degrees, swing engaged by its self shall add lift to maintain
the relative boom angle at 30 degrees.

Swing Speed Proportioning

The boom control system sensors sense the distance the platform
is extended from the turntable, allowing higher swing speeds
with the boom retracted and gradually slower swing speeds as
the boom is extended.
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SECTION 4 - MACHINE OPERATION
Platform Load Sensing System (LSS)
The Platform Load Sensing System provides the platform capac-
ity to the control system.
If the LSS system senses an overload condition, boom functions
will be disabled, the overload indicator is illuminated at both con-
trol stations, and the overload alarm will sound. Reduce the
weight in the platform to not exceed the rated workload indi-
cated on the capacity decal, then the controls will work again.

Stability

Machine stability is based on two (2) conditions which are called
FORWARD and BACKWARD stability. The machine's position of
least FORWARD stability is shown in (See Figure 4-1.), and its posi-
tion of least BACKWARD stability is shown in (See Figure 4-2.)
TO AVOID FORWARD OR BACKWARD TIPPING, DO NOT OVERLOAD MACHINE OR OPER-
ATE THE MACHINE BEYOND THE LIMIT OF THE MAXIMUM OPERATING SLOPE.
4-3