Abstract: A device for moving a jet member (6) having a nozzle comprises a carriage (4) with a base portion (5) to which the jet member is connected. The carriage is movable in a substantially rectilinear first path along a guide member (3). The connection of the jet member to the base portion provides a movability of the jet member (6) with respect to the base portion (5) and by that said carriage comprising a movability of the jet member for moving an impact point of the jet in a second path perpendicularly to said first path. A control unit is controlling a driving arrangement to combine a movement of the carriage along the guide member (3) and a movement of the jet member with respect to the base portion of the carriage so as to make an impact point of the jet on a said layer to travel with a constant speed over the layer.

Abstract: A device for moving a jet member in a first path over a layer to be treated by the jet has means configured to enable input of data relating to a geometrical shape of a surface of said layer to be treated by the jet member and means configured to use said data for calculating end positions (S1, S2) of an impact point of the jet member for a plurality of consecutive stripes (S) extending substantially perpendicularly to a second path for indexing, each having a width substantially corresponding to an indexing step and together forming said geometrical shape. A control arrangement co-ordinates movement of the impact point of the jet member and said indexing for treating a surface of said layer having said geometrical shape by said jet member.

Abstract: A device for moving a jet member on a carriage (6) between two selectable extreme positions along a guide (5) has means for detecting that the carriage has reached a selectable extreme position, said means comprising members (24, 25) adapted to form a mechanical resistance against continued movement of the carriage so as to influence the flow of hydraulic liquid in an hydraulic circuit (27) of a hydraulic drive arrangement for moving the carriage. Members (31) are arranged to sense a parameter of the hydraulic liquid, the magnitude of which is depending upon the flow of hydraulic liquid in the hydraulic circuit, and send information about the magnitude of this parameter to a control unit (14) adapted to control the turning of the carriage on the basis of this information.

Abstract: A device for moving a jet member (6) having a nozzle has a carriage (4) movable in a substantially rectilinear path and provided with a base portion to which the jet member is pivotably connected. A first drive member (9) is arranged for moving the carriage for moving the nozzle of the jet member in the rectilinear path over a layer to be treated by the jet, and a second drive member (10) is arranged for pivoting the jet member with respect to the base portion for changing the attack angle of the jet upon the layer. A control arrangement (21) is situated to coordinate the control of the first and second drive members for moving the impact point of the jet on the layer with a substantially constant speed over the layer.

Abstract: A device for moving a jet member (6) having a nozzle has a carriage (4) movable in a substantially rectilinear path and provided with a base portion to which the jet member is pivotably connected. A first drive member (9) is arranged for moving the carriage for moving the nozzle of the jet member in the rectilinear path over a layer to be treated by the jet, and a second drive member (10) is arranged for pivoting the jet member with respect to the base portion for changing the attack angle of the jet upon the layer. A control arrangement (21) is situated to coordinate the control of the first and second drive members for moving the impact point of the jet on the layer with a substantially constant speed over the layer.

Abstract: A device and a method for moving an object are based on the fact that the object (8) is pivotable in relation to a base portion (7) about an axis. There is an arrangement (18) for displacing, during pivoting motion of the object, the object substantially parallel to its pivoting plane for the purpose of causing a point of the object to describe a motion in substantially one and the same plane as a consequence of the combined pivoting/displacing.