JLG 1850SJ Operation & Safety Manual page 63

4.2.3 Envelope Tracking
1. Envelope
When the platform approaches the edges of the operating envelope all machine
functions are slowed down except jib and platform functions, telescope in or out at the
rearward edge and telescope in or out on the forward edge are slowed down
automatically by the boom control system to reduce machine motions.
Note: Boom Control System in Automatic Mode: When the boom is completely ele-
vated along the edge of the backward stability region and the telescope in func-
tion 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 activate lift and/or telescope in the
proper direction to bring the boom back into the envelope.
4.2.4 Controlled Angle
The control system automatically maintains a constant elevated boom angle when
swinging the turntable. If the boom angle is at 30 degrees and swing only is activated
the control system shall add lift to maintain the relative boom angle at 30 degrees.
1850SJ
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2. Slow Down Line
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Machine Operation
BM000316A
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