An excavator may perform a finishing operation to prepare a slope while maintaining workability. The excavator includes an undercarriage, a slewing upper structure rotatably mounted on the undercarriage, a boom pivotally mounted on the upper structure, an arm rotatably mounted on a tip end of the boom, a bucket mounted on a tip end of the arm, and a controller. The controller restricts a lowering operation of the boom, so that at least one of a pressing force of the bucket against the ground and a speed of lowering the bucket toward the ground does not become relatively large.

A motor grader is disclosed. The motor grader may include an articulated implement. The motor grader may include an articulation control device. The articulation control device may be configured to determine that articulation motion of the articulated implement is occurring, for a threshold amount of time, in a second direction that is different from a first direction indicated by an articulation control command. The articulation control device may be configured to perform a response action based on determining that articulation motion of the articulated implement is occurring, for the threshold amount of time, in the second direction that is different from the first direction indicated by the articulation control command.

A guidance system for a work vehicle is provided. In one example, the guidance system includes indicator lights positioned on control levers of the work vehicle and a position sensor for detecting various positions of a work tool coupled to the work vehicle. The guidance system can receive sensor signals from the position sensor and responsively activate (i) one indicator light when the work tool is positioned adjacent to a target horizontal position and (ii) another indicator light when the work tool is positioned at the target horizontal position.

A shovel includes a traveling body, a turning body mounted on the traveling body, a work attachment including a boom attached to the turning body, an arm attached to an end of the boom, and an end attachment attached to an end of the arm, and a processor coupled to a memory storing instructions and configured to read and execute the instructions stored in the memory to control a turning operation of the turning body in accordance with a predetermined operation of the work attachment to cause the end attachment to perform the predetermined operation as seen in a plan view in response to an operation by an operator.

Provided is a working machine having an expanded range of a working device posture which permits information on an attachment of the working device to be transmitted from the attachment to a machine body through wireless communication. The working machine includes: a transmitter disposed in the attachment so as to be displaced together with the attachment relatively to the machine body and configured to send an information signal containing information on the attachment; a receiver disposed in the machine body and configured to receive the information signal; a controller which acquires information on the attachment based on the information signal received by the receiver; and a relay device disposed in the working device main body to receive the information signal sent by the transmitter and transmit the information signal to a position at which the information signal can be received by the receiver.

A system for proactively controlling rimpull limit of a machine includes a hydraulic system having a lift cylinder to move an implement; a lift cylinder pressure sensor that senses a hydraulic pressure of the lift cylinder and responsively produces a lift cylinder pressure signal; and a controller in operable communication with the power train and the lift cylinder pressure sensor. The controller is configured to receive the lift cylinder pressure signal; determine the rimpull limit based at least in part upon the lift cylinder pressure signal; and adjust the torque of the power train to the rimpull limit.

A control system for a construction machine includes an electric lever operating device that outputs a command to a hydraulic actuator, a travel control lever device that outputs a command to a travel device, and a controller that outputs a drive command to a solenoid proportional valve that decompresses hydraulic fluid supplied from a pilot hydraulic source. The control system includes a machine body state judgment part that judges the state of the machine body based on an electric signal from the electric lever operating device and an operation amount of the travel control lever device and a dead zone calculation part that calculates a dead zone for the electric signal from the electric lever operating device based on the state of the machine body. The dead zone calculation part sets the dead zone for the electric signal at a first predetermined value when the machine body is in the travel-solo state and sets the dead zone for the electric signal at a second predetermined value smaller than the first predetermined value when the machine body is in the traveling work state.

A motor grader including a main frame, an operational frame movable relative to the main frame about a primary joint, and a plurality of hydraulic cylinders configured to adjust a position of the operational frame relative to the main frame, where each cylinder of the plurality of cylinders is movable between an extended position and a retracted position to adjust the length thereof. The motor grader further includes a processor configured to receive a signal indicating a desired cross slope of the operational frame, receive a signal identifying one of the plurality of cylinders as a lead cylinder, determine a desired position of the operational frame that achieves the desired cross slope of the operational frame, estimate a current position of the operational frame by monitoring a length of the lead cylinder, and adjust the position of the operational frame by controlling a follower cylinder of the plurality of cylinders to create the desired cross slope.

A motor grader including a main frame, an operational frame movable relative to the main frame in three directions, and a linkage system coupling the operational frame to the main frame. The linkage system includes a plurality of hydraulic cylinders each movable between an extended position and a retracted position to adjust the length thereof. The plurality of cylinders is operationally connected such that movement of one cylinder of the plurality of cylinders causes movement of at least another cylinder of the plurality of cylinders. A processor is configured to receive a signal related to the length of at least one cylinder of the plurality of cylinders, and estimate, based in part on the signal, a position of the operational frame relative to the main frame in the three directions.

A system and method for guiding an implement on a machine to a target location is disclosed. The system comprises a GUI and a controller in operable communication with the GUI. The controller is configured to: (a) determine a current location of the implement relative to the target location on the work surface; and (b) display on the GUI a symbol in one of a plurality of states, each state associated with one or more locations of the implement relative to the target location. The state in which the symbol is displayed is indicative of the current location of the implement relative to the target location and each state is identified by at least one illuminated portion of the symbol. The controller is further configured to: (c) repeat (a) and (b) each time the implement is moved to a new current location.