Abstract: In the present arrangement, a forest machine is controlled, which forest machine includes a body (2), a boom (3) in connection with the body (2) and a tool (4) at the end of the boom (3). A sensor (9) arrangement determines in advance the size of utilizable free space (1 1A, 1 1B) starting from the end of the boom (3). This determination includes determining a direction and a length of the free space (11B). The operation of the tool (4) is allowed into the direction and for the length of the utilizable free space (1 1A, 1 1B) determined in advance.

Abstract: The invention relates to a method for felling sawing using a forest machine. In the method, a felling head is used, which set near to the tree to be felled. In addition, sawing is performed on the tree using a saw device fitted to the felling head. Before sawing, the saw device is set to a selected level relative to the ground surface, which is recorded in the data system belonging to the forest machine. The invention also relates to a system for felling sawing using a forest machine.

Abstract: In the disclosed solution, a boom assembly of a work machine is controlled by tip control. In tip control, a control command is given to a tip of a boom assembly, converted into control commands for individual actuators of the boom assembly. In the disclosed solution, a variable related to a load and its position at the tip of the boom assembly is defined, and the variable in question related to the load and its position at the tip of the boom assembly is taken into account in the control command for the actuator.

Abstract: The aspects of the disclosed embodiments are related to access steps for a work machine including a stepladder; a pivot mechanism configured to be fastened to a work machine for articulating the stepladder to the work machine; and an actuator configured to be fastened to the work machine between the work machine and the stepladder for turning the stepladder to the operating position and the transport position with the pivot mechanism. The pivot mechanism is configured to move the stepladder with a linear movement of the actuator in the direction of the pivot shaft and turn the stepladder around the pivot shaft. The aspects of the disclosed embodiments are also related to a work machine.

Abstract: In the solution put forth, a pressure level of a pump in a hydraulic transmission system of a hydraulic working machine, or power that is feedable to an electric drive motor of an electric working machine is monitored, and/or the rotation speed at the output of the drive motor of the working machine and the rotation of moving means of the working machine are monitored. The pressure level of the hydraulic power transmission pump, or the power feedable to an electric drive motor, is compared with a lower threshold value to detect a fault situation, and/or the rotation speed at the output of the drive motor is compared with the rotation of the moving means also to detect a fault situation. In case a fault situation is detected, the braking system of the working machine is controlled to apply the brakes.

Abstract: A condition of at least one structural part (11) of a working machine (10) is determined by determining a computational position of the first structural part (11?) on the basis of the computational model of the working machine (10) and determining an actual position of the first structural part (11?) by detecting means (22). The condition of the at least one structural part (11) is determined on the basis of the difference between the computational position of the first structural part (11?) and the actual position of the first structural part (11?).

Abstract: A control arrangement includes at least one sensor. The sensor is adapted to detect at least one object in an area of at least one predefined sector focused in an area between a control cabin and a boom end, and to detect at least one of: location information of the detected object at two different time instants, at least, and the speed of the detected object. The control arrangement additionally includes at least one control unit adapted to determine at least the direction of travel of the detected object in relation to the control cabin at two different time instants, at least, based on the detected location information and/or the detected speed of the object, and cause a change in the control of a forest machine responsive to the detected direction of movement of the detected object being directed towards the control cabin in the area of the sector.

Abstract: Off-road work machines (e.g., forestry machines) and unloading such machines are described. A forestry machine includes a load space for a timber load, a boom structure, and a wood-handling tool attached to the boom structure. The method includes defining and noting down the location of the timber pile, calculating and noting down the location of the edge of the timber pile, picking a timber bundle from the timber load by the wood-handling tool, calculating the distance of the end justified on a load screen of the edge of the timber bundle from the wood-handling tool, calculating an unloading location for the timber bundle in the defined location of the timber pile, and controlling and unloading the timber bundle into the timber pile in the calculated unloading location such that one edge of the timber pile becomes even and straight.

Abstract: A method and system for controlling a power-transmission device in a forest machine having a harvester head includes measuring a selected property of at least two trees with aid of observation means on a basis of electromagnetic radiation at a distance from the trees being measured to create measurement data. The power-transmission device is controlled by software on the basis of the measurement data to change a state of the power-transmission device to optimize energy required to perform an operation of an operating device. The operating device uses the energy transmitted by the power-transmission device (after the change in state of the power-transmission device) so that operation of the operating device creates a change in the attitude, location, or state of the harvester head.

Abstract: A pressure medium cylinder (1) for moving a toothed bar (3), comprising a toothed bar (3) on at least one side of which is formed a toothing (4). Inside the toothed bar (3), a cavity (6, 6a, 6b) is formed, extending to at least one end (7a, 7b) of the toothed bar. The pressure medium cylinder (1) further comprises a longitudinal structure (8, 8a, 8b), the longitudinal structure (8, 8a, 8b) and the toothed bar (3) being adapted movably in relation to each other, and the longitudinal structure (8, 8a, 8b) is adapted at least partly inside said cavity (6, 6a, 6b). The toothed bar (3) and longitudinal structure (8, 8a, 8b) are adapted in a sealed manner in relation to each other so that the toothed bar and the longitudinal structure are movable in relation to each other by the effect of a pressure medium.

Abstract: Disclosed is a new type of dosing device in a tree-processing device and a method for using it. The dosing device comprises a pump (2) to be attached to the processing device and a feed hose (15) connected to the pump (2) for leading the treatment agent fed by the pump (2) to the point of use. In the device is a replaceable treatment-agent cartridge (7) and the treatment-agent cartridge contains treatment agent. The cartridge is attached to the inlet port of the pump (2) by means of an adapter (4).

Abstract: A joint element provided with a swing dampener element and comprising a first joint part, a second joint part, and a swing dampener brake. The second joint part comprises a second end part which is detachably fixed to a first end part of the second joint part by a joint part coupling which is adapted to allow the second end part to be moved in an axial direction to a detached position in relation to the first end part, the detached position allowing replacement of active components of the swing dampener brake while the first end part remains bearing-mounted to the first joint part, the active components of the swing dampener brake comprising at least one first brake disc member and at least one second brake disc member.

Abstract: The invention relates to a suspendable scale for weighing a bundle, comprising: a first part for suspending the scale from a structure; a second part for suspending an implement from the scale; a third part joining the first part and second part, the first part, second part, third part being at least partly radially nesting relative to one another; at least two strain gauges connected to the third part; a wireless transmitter for sending the measurement data to an operator; a self-powered power supply for feeding an electric current to the strain gauges and the wireless transmitter; a first space formed in the scale to integrate the wireless transmitter inside the scale; and a second space to integrate the power supply inside the scale. The invention also relates to an arrangement for hoisting a bundle.

Abstract: A method for controlling operation of a wood-handling device in a work machine. The wood-handling device is attached through a rotation device to an end of a set of booms of the work machine to create a desired orientation of the wood-handling device for the operation. The orientation of the wood-handling device using the rotation device is tied on the basis of the operation to be performed using the set of booms. The orientation of the wood-handling device is tied to the position of the end of the set of booms. The position of the end of the set of booms is defined while performing the operation, on the basis of the position of the end of the set of booms. The wood-handling device is oriented using the rotation device, according to the said tie.

Abstract: A condition of at least one structural part (11?, 11?) of a working machine (10) is determined by detecting (201) a force of a changing magnitude to a first structural part (11?) or a structural part connecting the first structural part (11?) to the second structural part (11?), determining (203) a change in the position of the first structural part with respect to the second structural part as a function of the force detected, and determining (205) the condition on the basis of the change in the position of the first structural part with respect to the second structural part as a function of the force detected. At least a slope of the change in the magnitude of the force is detected.

Abstract: A user interface for fleet management includes a first user interface zone and a second user interface zone, which are can be presented to the user simultaneously on the same first user interface. On the first user interface is presented, in response to a selection made by the user, simultaneously at least two parallel first selection elements, and from the selected at least one first selection element, at least one selectable first selection element related thereto and included in the next higher or lower hierarchical level. The second user interface zone is arranged to present information which is based on selections made by the user via the first user interface zone.

Abstract: The invention relates to a method in a forest machine. In the method the surroundings of the forest machine are observed using one or more sensors. The observations are assembled to form a database of the surroundings, and the database is utilized in the operation of the forest machine. In the method observations of a limited area are used. In addition, a database is formed in real time in the forest machine. Further, a view is formed from the database of selected observations, from which a track in the surroundings is recognized. The forest machine is then oriented in the direction of the track, once the forest machine's direction of travel relative to the recognized track has been recognized. The invention also relates to a system in a forest machine.

Abstract: The invention relates to a suspendable scale for weighing a bundle, comprising: a first part for suspending the scale from a structure; a second part for suspending an implement from the scale; a third part joining the first part and second part, the first part, second part, third part being at least partly radially nesting relative to one another; at least two strain gauges connected to the third part; a wireless transmitter for sending the measurement data to an operator; a self-powered power supply for feeding an electric current to the strain gauges and the wireless transmitter; a first space formed in the scale to integrate the wireless transmitter inside the scale; a second space to integrate the power supply inside the scale. The invention also relates to an arrangement for hoisting a bundle.

Abstract: A crane arrangement includes a base, a pillar boom, a lifting boom, a folding boom, a lifting cylinder, and a folding cylinder. The lifting boom includes a first pivot point for connecting the pillar boom to the lifting boom, a second pivot point for connecting the lifting cylinder to the lifting boom, and a third pivot point for connecting the folding cylinder to the lifting boom. The lifting boom further includes a hollow cast connecting piece arranged at the first end of the lifting boom, in which connecting piece at least the first pivot point and second pivot point are arranged. The invention also relates to a corresponding work machine.