Operating cranes in tandem operation

Only with ABUS Electrics 3

See the “ABUS Tandem Control System” product manual.

 

Only with ABUControl

 

Working with two cranes in tandem operation:

Check the following points before beginning work in tandem operation. If there is any damage or problems arise, do not work with the crane; inform coworkers and supervisors.

 

Switch on tandem operation at the transmitter:

   Check whether the two cranes are not being used independently of one another by another person.

   Allow the cranes to come to a complete standstill. Do not switch to tandem operation during travel.

   Activate tandem operation at the transmitter.

See the ABURemote product manual.

●   On both cranes the white signal lamp “Crane active” lights up.

 

 

Check the crane/trolley travel limit switch and hoist limiter:

 

   Check the braking function of both cranes and trolleys in tandem operation.

   Check the shut-down function of both cranes and trolleys in tandem operation.

   Check the hoist limit switch of both hoists in tandem operation.

●   If one of the crane drives or trolley drives brakes or halts, or if one of the hoists brakes or halts, the other crane and the other trolley are also synchronously controlled.

 

 

With the tandem control system switched on, it can be necessary to control an individual crane briefly (e.g. for slinging the load or compensating height differences).

During this, the other crane must be blocked and must not move (e.g. through another crane operator). This mode of operation is called individual operation.

 

Switching to individual operation in tandem operation (controlling one individual crane and blocking the other crane):

   Allow both cranes to come to a standstill.

   Select one of the two cranes on the transmitter.

See the ABURemote product manual.

●   The crane selected is now activated in individual operation.

●   On the selected crane the white signal lamp “Crane active” lights up.

●   The crane not selected is blocked for the duration and cannot be controlled (e.g. by another crane operator).

●   On the crane that is not selected the white signal lamp “Crane active” goes out.

   Operate the crane selected.

   Select both cranes again at the transmitter.

 

 

In order to sling a joint load, switch tandem operation on first, then sling the joint load in individual operation (control one crane and block the other), then transport the load using both cranes in tandem operation.

 

   Select lifting tackle or load lifting attachments which will hold the load safely even if the load is accidentally brought out of plumb alignment.

   Activate tandem operation at the transmitter.

See the ABURemote product manual.

   Select one of the two cranes for individual operation on the transmitter.

   Move the load hook to the required hook position in individual operation.

   Attach the lifting tackle or load lifting attachments safely to the load and hook.

   Select the other crane for individual operation on the transmitter.

   Move the load hook to the required hook position in individual operation.

   Attach the lifting tackle or load lifting attachments safely to the load and hook.

   Select tandem operation for both cranes on the transmitter and lift the load.

 

 

   Use the buttons for crane travel, trolley travel, lift and lower to lift and transport the load.

See the ABURemote product manual.

●   Only for hoist with frequency converter: ABUControl monitors the speed of the two hoists and automatically controls the lifting speed. This ensures a constant lifting speed of both hoists during lifting and lowering, even with unequal load distribution.

●   ABUControl monitors the speed of the crane drives and trolley drives and automatically controls the travel speed. Thus, both cranes and trolleys travel at the same constant speed.

●   ABUControl monitors the distance between both cranes and controls the crane travel speed so that the distance between the two cranes remains constant.

 

The optical anti-collision device also works in tandem operation. This prevents the collision of the two cranes in tandem operation with further cranes on the same crane track.

 

 

In tandem operation, the crane travel limit switch and the trolley travel limit switch, as well as the hoist limit switch, are evaluated together.

If one of the crane drives or trolley drives brakes or halts, or if one of the hoists brakes or halts, the other crane and the other trolley are also synchronously controlled.

 

 

In tandem operation, the overload protection of both cranes is jointly evaluated.

If one of the cranes is overloaded, the other crane is stopped simultaneously.

 

 

   Set down the joint load.

   Deactivate tandem operation at the transmitter.

See the ABURemote product manual.

●   The tandem control is now switched off. Both cranes can now be used independently of each other again. Both cranes can now be used independently of each other again.