User`s manual
14
NOTE
Automatic limit switches are emergency safety devices, not to be used under normal service conditions. In particular, the hoist limit
switch shall be adjusted in such a way that the block can approach the fixed lower parts of the winch by not less than 0.3 - 0.5 m; on
its rundown the hook shall stop at 0.2 - 0.3 m from floor level (see page 137).
When the hook is in the lowest position at least two rope spare turns for each drawing ends shall be still wound on the drum.
INSTALLATION
In setting the machines to work all the rules of good technical practice and the manufacturer's instructions given in this user’s manual
must be followed, particularly:
• The first ever setting to work of the machine must be performed by trained staff.
• The technical characteristics of the machine must correspond to what was ordered as well as to the use for which it is
intended.
• The lifting capacity of the machine must be equal to or higher than the loads to be lifted and the lifting path must not be
shorter than necessary.
• The power supply voltage available must correspond to the machine's (+/- 10 % of the nominal value): it is not possible to
use the machine if the voltage or the frequency are different from the ones required.
• The electric power supply cables must be adequate as to cross-section and insulation to the power indicated and extension
cords and temporary sockets must never be used.
• The mono rail or crane gantry beams which carry the machine must be correctly sized, based on the reaction force defined
by the manufacturer.
• Always check rails/monorails are not damaged. They must be free from obstacles, depressions or foreign bodies.
• Always check the working area is free from anything which may interfere..
• Working intensity must correspond to the one the machine was designed or purchased for, otherwise it may result in the
reduction of the machine’s life and safety.
• Check there is no leakage of lubricant.
• Check travel limit switches and the relevant actuators are properly positioned and locked.
• Make sure there are end stops for the bridge and/or the trolley.
• Check that the moving direction coincides with the function envisaged for the pressed push button/actuator. Otherwise,
immediately stop maneuvering and reverse two phases of the incoming feeding line on the control panel, or else reverse the
connection to the relevant motors.
•
Road test the wire rope by hoisting a light load at “slow” speed. This allows the wire rope to adapt itself to the working
conditions, thus permitting the adjustment of strands and wires and prolonging the rope’s life.
RUNNING CHECKS
Before using the machine a preliminary test must be carried out to give the best guarantee of service. Even if all the machines up to
20-Ton capacity undergo a dynamic lifting test with a 10% overload (unless otherwise requested on purchase) in the factory it is
preferable that the client satisfies himself with a more realistic test after assembly. This test is also useful for the following checks:
a) actual working conditions
b) running difficulties (correct assembly check)
c)
potential running hindrances (check on railways and their installation tolerances)
d) setting the load limiter
SAFETY
DEVICES
Power supply to the machine must be cut off by disconnecting the switch/disconnecting switch and/or pressing the “emergency stop”
push button located on the push button panel. In order to return the emergency push button to its normal position, turn it anticlockwise.
An electrical and/or mechanical interlock prevents two opposite rotation direction command signals from being simultaneously
transmitted to motors, both at “slow” or at “fast” speed.
The lack of voltage causes the motors to stop at once thanks to the immediate action of electromagnetic brakes.
Safety snap hooks are installed on lifting hooks to avoid accidental unhooking of slings and/or loads.
Position limit switches (e.g. hoisting and traveling) define the maximum motion range. They are emergency devices and should not be
used as either stop or consent devices for subsequent operations.
The load limiter prevents the machine from being used under overloading conditions (the limit of intervention is usually set at 115% of
regular load)
Controls (push buttons and/or manipulators), when they are not pressed by the operator, automatically commute to the 0 position,
thus stopping the movement (“dead man” control).
Should, when the control (push button and/or manipulators) is operated, the movement and/or direction not coincide with the
one selected due to a malfunctioning, release the control. If, in spite of the control being released, the movement does not stop, press
the “emergency stop” push button immediately.