Controlled Arc; Envelope Tracking - JLG 1200SJP Operation And Safety Manual

SECTION 4 - MACHINE OPERATION

Controlled Arc

When the Boom Control Select switch is in the automatic mode,
the boom control system automatically controls lift and tele-
scope when the lift function is selected to move the platform
through a predetermined arc, equivalent to the percentage of
extension. (i.e. If you start at 70% boom extension, you will end
up at approximately 70% boom extension no matter where you
stop in the arc). This means that when lifting down, telescope in
4-2
will function automatically, or when lifting up, telescope out will
function automatically.
When the Boom Control Switch is in the manual mode, lift and
telescope functions are independent functions controlled by the
operator.

Envelope Tracking

When the platform approaches the edges of the operating enve-
lope all machine functions are slowed down automatically by the
boom control system to reduce machine motions.
ENVELOPE
BUFFER LINE
SLOWDOWN LINE
BUFFER
ZONE
SLOWDOWN
ZONE
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