Installing the cross-type limit switch

Only with cross-type limit switch

This section is only applicable if the overhead travelling crane has a cross-type limit switch in the direction of crane travel.

Where and for which travel limit the cross-type limit switch is designed is specified on the wiring diagram.

 

Danger due to malfunction! If the cross-type limit switch is screwed on too tightly, the parts on the inside can become jammed and no longer function properly. The tightening torque of 3 Nm must be precisely observed.

 

Mounting bracket	Threaded bracket
Cross-type limit switch

    Screw the mounting bracket onto the cross-type limit switch with the fillister-head screws M5x50 (2x).

    Screw on the mounting bracket using locking washers and M5 hex nuts (2x). 3 Nm.

    Insert threaded brackets (2x) in the mounting bracket.

    Loosely screw in the M8 rib nuts (4x).

 

 

The cross-type limit switch can be installed on the mains power carrying fork or on a separate square tube, for example.

 

Pipe clamp	Cross-type limit switch
Horizontal square tube	Vertical square tube

    Turn the travel limit switch to position 0.

The position of the cross-type limit switch is marked with an arrow that can be rotated further, depending on the switching state.

    Hold the travel limit switch against the square tube so that the switching lug activates the travel limit switch.

    Screw the travel limit switch onto the vertical square tube using pipe clamps (2x). 15 Nm

 

 

    Route the connection cable (round cable or flat cable) from the cross-type limit switch to the panel.

    Route the connection cable with cable fitting into the panel.

    If necessary: Connect the connection cable to a coupler plug or connector.

    Fasten the connection cable with cable ties, cable ducting and adhesive clips.

 

 

C-rail	Clamping claw
Switching lug	Crane track

    Suspend a load on the load hook which matches the maximum load capacity of the crane.

    Determine the necessary distance between the actuating cam and the end stopper:

For braking function: The distance must be such that the crane is only travelling at a low speed shortly before the end stopper.

For shut-down: The distance must be such that the crane is at a standstill shortly before the end stopper.

    Add 0.5 m to 1 m to the calculated distance. This will compensate the brake wear on the crane travel drive.

    Install the actuating cam for the crane travel limit switch to the crane track or conductor system at the determined distance.