47
ELECTRIC WIRE ROPE HOIST
XM SERIES
4. OPERATION AND MAINTENANCE INSTRUCTIONS
The operator must strictly avoid oblique pulling of the
load, which is always dangerous and hard to control,
and especially oblique pulling as shown in the figure,
which could in addition cause damage to the rope
guide and the grooves, which could even cause coiling.
4.2.2 TROLLEY TRAVEL
It is essential to avoid forceful impacts between
the trolley and the end stoppers, in order not to
seriously damage the mechanical component
and the structure. It must be kept in mind
that the limit switches are placed in a position
that allows full travel of the trolley when it is
approaching them at low speed, and that
the required braking distance increases with
the speed. Consequently, the operator must
always slow down the travel speed when the
trolley approaches the rail ends.
4.2.3 EMERGENCY AND INTERLOCK DEVICES
To disconnect the power supply of the
machine, switch-off the line circuit breaker or
press the "EMERGENCY STOP" button on the
keypad. An electrical and mechanical interlock
on the hoist and travel motors prevents the
simultaneous rotation in two directions; the
electric interlock on the hoist motors for slow
and fast speed prevents simultaneous power
feeding. No voltage causes the immediate
stoppage of all movements of the hoist,
since the electric motors are equipped with
automatic negative brakes.
4.2.4 SAFETY DEVICES
The lifting limit switch, which limits the max
hook travel, and the trolley travel,
limit
switch are safety devices, not meant to
be systematically used as normal stop or
enabling devices for further operations.
The load limiter with two reaction thresholds
(first: WARNING, second: STOP) prevents the
operation of the hoist with an overload. The
lifting hook is equipped with a safety catch
preventing the accidental release of the slings.
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