The wire rope hoist has a gear limit switch with at least three switching points. The backup limiter and the top hoist limiter are set at the factory. The bottom hoist limiter was set during assembly.

After wire rope replacement or repairs, the backup limiter and top hoist limiter may have to be reset.

─     The hook headroom is always the distance between the lower edge of the wheel on the wire rope hoist and the inner edge of the load hook.

─     The hook headroom is the absolutely uppermost position up to which the load hook may move without damaging the wire rope.

─     The hook headroom always refers to a standard series load hook. In the case of larger or smaller load hooks, see the wire rope data sheet for details of the hook headroom.

Hook headroom for wire rope hoists of overhead travelling cranes: types E, S and U.

Hook headroom for wire rope hoists of overhead travelling cranes: types D, DA, DQA and Z.

    Read the hook headroom (C-size) from the table.

Table: Hook headroom for wire rope hoists of type E. With larger hoist spans please heed the following!

Table: Hook headroom for wire rope hoists of type S

Table: Hook headroom for wire rope hoists of type U

Table: Hook headroom for wire rope hoists of type D

Table: Hook headroom for wire rope hoists of type DA

Table: Hook headroom for wire rope hoists of type DQA

Table: Hook headroom for wire rope hoists of type Z

Table: Hook headroom for wire rope hoists of type ZA

    Raise the load hook up to the hook headroom point.

At the hook headroom previously travelled to:

─     The backup limiter is set with the backmost white adjusting screw.

    If necessary: Turn the adjusting screw until the control cam is to the left of the Microswitch. It should not be either directly on or to the right of the microswitch.

    Turn the adjusting screw to the right until the control cam presses in a clockwise direction against the Microswitch and an audible click is heard.

●   The main contactor switches off.

If the switching point is set with a different adjusting screw than previously specified, this is noted on the wiring diagram.

    Turn the adjusting screw three-quarters of a turn to the left.

●   The microswitch switches again; the main contactor switches back on.

    Lower the load hook slightly.

    Turn the adjusting screw three-quarters of a turn back to the right.

    Read off the braking distance from the table.

This braking distance is determined by the LIS-SV and is not identical to the braking distance during lifting/lowering in normal crane operation.

    Move the load hook until it rests at exactly the braking distance under the hook headroom.

At the hook headroom and braking distance previously travelled to:

─     The top hoist limiter is set with the white adjusting screw second from the back.

    If necessary: Turn the adjusting screw until the control cam is to the left of the microswitch. It should not be either directly on or to the right of the microswitch.

    Turn the adjusting screw to the right until the control cam presses in a clockwise direction against the Microswitch and an audible click is heard.

If the switching point is set with a different adjusting screw than previously specified, this is noted on the wiring diagram.

    Lower the load hook.

    Lift the load hook at both slow and fast lifting speed and check whether it halts at the correct point.

●   The counted impulses of the encoder are shown in the LIS-SV display.