Positioning - Kalmar DRF420-60S5 Maintenance Manual

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Control switch

Overloading system

7 Load handling – 7.5 Positioning

Spreading, function description

Spreading means that the width between the twistlocks is changed.

Spreading has two 20-foot and 40-foot stops, as an option there are

stops at other distances, e.g., 30-foot stop.

Control valve attachment pressurizes valve block spreader motor

that directs pressure to the spreader motor. The spreader motor

pulls the spreader chains that pull the spreader booms in and out.

Spreading is controlled with Control lever (S815). Inductive position

sensors indicate the spreader units' position.

Damping means that the speed of functions are reduced automati-

cally close to end-positions. Three seconds after damping is activat-

ed, the function is interrupted. This results in less loading of

mechanical parts at stops in end-positions.

Position sensors sense when damping should be activated. When

damping is activated, the control unit in question reduces the con-

trol current to the solenoid valve for that function.

Reference value

Not activated

Unlocked or by-pass activated

Maintenance manual DRF 400–450

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Positioning

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