Abstract: An end effector leveling system for moving an end effector of a work machine with a boom assembly, a plurality of sensors, an input interface, and a controller. The plurality of sensors are configured to sense a current movement speed of the hoist boom, the stick boom, and the end effector. The input interface is configured to receive an end effector target angle input command for movement of the end effector at a constant target angle. The controller receives command signals from the input interface, determines based on the command signals a target tilt actuator velocity for actuating the tilt actuator, and an actual tilt actuator tilt velocity actuator and command the tilt actuator to move such that the end effector moves with an aggregate velocity derived from a weighting function of the target tilt actuator velocity and the actual tilt actuator velocity.

Abstract: An intelligent boom control hydraulic system with a straight-line feature, for a feller buncher is disclosed. The system comprises a hoist hydraulic cylinder, a stick hydraulic cylinder, a hoist boom position sensor, a stick boom position sensor, a hydraulic fluid pump, a hydraulic reservoir including hydraulic fluid, and various valves. A hoist control valve controls flow from the hydraulic pump to the hoist hydraulic cylinder, and the hoist hydraulic cylinder to the hydraulic reservoir. A stick control valve controls flow from the hydraulic pump stick hydraulic cylinder, and the stick hydraulic cylinder to the hydraulic reservoir. A straight-line control valve the hoist hydraulic cylinder and the stick hydraulic cylinder. A microprocessor directs sends signals to control the hydraulic fluid flow through control valves based on target hoist stick boom velocities and a look up chart to select valve combinations to achieve the target hoist and stick boom velocities.

Abstract: The disclosure relates to a method for controlling the crane of a working machine by using boom tip control, in which method the crane comprises at least two booms connected to the working machine and each other in an articulated manner, which booms are moved in relation to the working machine and to each other by means of actuators controlled by a control system of the working machine, and in which method the direction and speed of motion of the head of the crane, controlled by the driver applying controls in the working machine, is implemented by applying speeds of the different booms of the crane.

Abstract: The disclosure relates to a method for controlling the crane of a working machine by using boom tip control, in which method the crane comprises at least two booms connected to the working machine and each other in an articulated manner, which booms are moved in relation to the working machine and to each other by means of actuators controlled by a control system of the working machine, and in which method the direction and speed of motion of the head of the crane, controlled by the driver applying controls in the working machine, is implemented by applying speeds of the different booms of the crane.