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9.5
Limit switch for wire rope path (as option)
The limit switch (if exist) must be adjusted before commissioning and after maintenance work has been
made. Intermediate checks for correct function are necessary.
The switching point for the upper load position must be set in such a way that even in case of unfavourable
cable winding the permitted highest load position is not overrunned. In individual cases it may be necessary
for the customer to install an external emergency switch. The limit switch for the lowest load position is
always driven exactly independently of the cable length.
NOTICE!
An exact driving up to the upper end position is only possible in the first wire rope layer with grooved rope
drum.
Exactness decreases with larger wire rope length and several wire rope layers.
9.6
Slack rope switch (as option)
In case of slack rope i.e. by setting down of the load, the slack rope switch prevents further unwinding of the
wire rope.
9.6.1 Function
The weight of roller lever and guide pulley actuates rotation of the switching shaft with eccentric disc in case
of slack wire rope. The eccentric disc pushes the switching pin of the limit switch down until the switching
contacts in the circuit for "lowering" open.
Lowering without load is impossible.
Should this, however, be necessary i.e. during installation or adjustment work, the wire rope must be tensed
by little load or the roller lever must carefully be actuated by hand. The switch can also be taken out of
service by dismantling the eccentric disc.
The slack rope switch will be installed in our factory according to customer's requirements. Installation
depends on the position of the winch and wire rope exit.
NOTICE!
Before commissioning, the switch must be adjusted by the customer.
The function is only possible in wiring direction "lowering". After the switch has actuated, "lifting" must still
be possible.
9.7
Pressure roller (as option)
Before putting the winch into operation and after maintenance work, as well as according to necessity, check
the device in order to guarantee the correct functions of the pressure roller.
9.8
Rope guiding device (Optional)
Check correct wire rope guidance before putting the winch into operation and after any maintenance work.
10 Safety
check
Before putting into service initially or when putting back into service, it must be checked whether:
All fastening screws (if existent), socket pins, flap socket and safety devices are tightened and secured.
The oil levels in the gear boxes are sufficient.
All movements of the load comply with the symbols on the control switch.
The wire ropes are winded up correctly, are lubricated and are in good condition.
11 Functional
test
11.1
Checks before the initial start-up
Check lifting by moving up/down and slow/fast without load.
Suspend the nominal load and check the function of the brake.
12 Maintenance
