Smiley Lifting Solutions SPYDERCRANE PC094, Operator'S Manual

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16
GENERAL INFORMATION
Operator Aids
Anti - Two - Block System
The Anti - Two - Block (A2B) System is designed to prevent the Operator
from damaging the PC094 by allowing the hook block to impact the boom tip of
the PC094.
Without the A2B System, if the PC094 Operator WINCHES UP, or if the
operator BOOMS OUT without WINCHING DOWN, the hook block will rise
until it impacts the tip of the PC094 ’ s boom, possibly causing damage.
The A2B System is composed of the A2B Switch and A2B Weight .
The A2B Switch is a spring loaded lever connected to a limit switch. Left
alone, the A2B Switch will spring into the OPEN position, which activates the
A2B System and disables the BOOM OUT, WINCH UP, and BOOM DOWN
functions of the PC094.
The A2B Weight is a round block of steel that is attached to the end of the
A2B Switch and pulls it into the CLOSED position, deactivating the A2B System
and allowing full crane functionality. The A2B Weight is attached around the
wire rope that holds the hook block. If the hook block rises to the point that it hits
and lifts the A2B Weight, the A2B Switch will spring OPEN.
Boom Length Sensor
The Boom Length Sensor measures the exact length of the boom as part of
the working radius calculation that determines the PC094 ’ s rated load capacity.
The Boom Length Sensor also helps the PC094 to index the correct lifting profile,
based on two specific length settings: whether the boom is in Stage 1 or 2, or if it
is in Stage 3 or 4
Capacity Limiting System (CLS)
The Capacity Limiting System (CLS) is the combination of the boom
length, lift cylinder pressure, and A2B System to prevent the SPYDERCRANE
PC094 from being overloaded.
The CLS is NOT designed to replace the PC094 Operator ’ s responsibility
for knowing his crane ’ s loading and traveling limits.
Lifting Profile
The Lifting Profile is an internal function of the PC094 that is part of the
CLS. The PC094 contains three discrete profiles and it indexes one as the active