The braking and shut-down functions operate according to the
specific application by means of a mechanical cross-type limit switch (e.g. at
the end of the crane track), a reflective light barrier (e.g. in the direction
of another crane on the same run), or a distance sensor (e.g. in the direction
of another crane on the same run with complex controls).
Only with braking
function
The crane (or trolley) has a braking function. The braking
function prevents the crane (or trolley) from impacting the safety buffer, an
obstacle or another crane (another trolley) at high speed.
If the crane (or trolley) runs at high speed:
● The crane
(or trolley) brakes at the switching point for the braking function:
─ The
crane brakes a small distance before the end of the crane track.
─ The
crane brakes a small distance before another crane on the same run.
─ The
trolley brakes a small distance before the end of the main girder.
─ The
trolley brakes a small distance before the other trolley.
● The crane
(or trolley) continues running at low speed.
Continue running the crane (or
trolley), if necessary, at low speed.
Run the crane (or trolley), if
necessary, in the opposite direction out of the limit switch range.
Only with braking function
and shut-down
The crane (or trolley) has a travel limit switch with braking
and shut-down functions. The braking function prevents the crane (or trolley)
from impacting the safety buffer, an obstacle or another crane (another trolley)
at high speed. The shut-down function additionally prevents the crane (or
trolley) from an impact at low speed.
If the crane (or trolley) runs into the limit switch range of the
braking function:
● The crane
(or trolley) brakes at the switching point for the shut-down function and
stops.
─ The
crane brakes just before the end of the crane track.
─ The
crane brakes just before another crane on the same run.
─ The
trolley brakes just before the end of the main girder.
─ The
trolley brakes just before the other trolley.
● The crane
(or trolley) is at the outermost limit of the traversing range and cannot go any
further.
Run the crane (or trolley), if
necessary, in the opposite direction out of the limit switch range.
With anti-collision device: Or
continue running another crane (another trolley) on the same run and thus
enlarge the traversing range of the crane (or trolley) again.