Abstract: A milling machine may have a frame, a milling drum attached to the frame, and ground engaging tracks that support the frame and propel the milling machine in a forward or rearward direction. The milling machine may have a tank that stores hydraulic fluid. The milling machine may also have at least one actuator connecting the frame to the tracks. The actuator may adjust a height of the frame relative to a ground surface. A fluid conduit may connect the tank to the actuator. The milling machine may have a flow sensor in the fluid conduit. The flow sensor may determine a flow parameter associated with a flow of the hydraulic fluid into or out of the actuator. The milling machine may also have a controller that determines a height of the frame relative to the ground surface based on the flow parameter.

Abstract: A milling machine may have a frame, a milling drum attached to the frame, and ground engaging tracks that support the frame and propel the milling machine in a forward or rearward direction. The milling machine may have at least one actuator connecting the frame to at least one of the ground engaging tracks. The actuator may adjust a height of the frame relative to at least one of the tracks. The milling machine may also have a non-contact leg-height sensor attached to the frame. The sensor may generate a signal indicative of a height of the frame relative to at least one of the tracks. The milling machine may also have a controller configured to determine the height based on the signal.

Abstract: A milling machine may have a frame, a milling drum attached to the frame, and ground engaging tracks that support the frame and propel the milling machine in a forward or rearward direction. The milling machine may have at least one actuator connecting the frame to at least one of the ground engaging tracks. The actuator may adjust a height of the frame relative to at least one of the tracks. The milling machine may also have a non-contact leg-height sensor attached to the frame. The sensor may generate a signal indicative of a height of the frame relative to at least one of the tracks. The milling machine may also have a controller configured to determine the height based on the signal.

Abstract: A milling machine may have a frame, a milling drum attached to the frame, and ground engaging tracks that support the frame and propel the milling machine in a forward or rearward direction. The milling machine may have a tank that stores hydraulic fluid. The milling machine may also have at least one actuator connecting the frame to the tracks. The actuator may adjust a height of the frame relative to a ground surface. A fluid conduit may connect the tank to the actuator. The milling machine may have a flow sensor in the fluid conduit. The flow sensor may determine a flow parameter associated with a flow of the hydraulic fluid into or out of the actuator. The milling machine may also have a controller that determines a height of the frame relative to the ground surface based on the flow parameter.

Abstract: A position determining system for a work machine includes a body and a work linkage. A laser receiver may be configured to detect a laser beam and communicate a height signal indicative of the height of the work machine body relative to the laser beam. A swing frame may pivot in a lateral direction relative to the work machine body about a swing axis and may include a swing frame sensor configured to monitor the swing position. A portion of a digging arm may pivot in the lateral direction about the swing axis and may include at least one digging arm sensor configured to monitor the position of the digging arm. A control module may be in communication with the laser receiver, the swing frame sensor, and the digging arm sensor. The control module may be configured to determine a position of the work linkage relative to the desired grade.

Abstract: A method of modulating a boom assembly to perform in a linear manner. The boom assembly includes a boom and a stick. The method comprising the steps of sending at least one lever signal to a control device indicative of operator desired direction and desired velocity of the boom and the stick, calibrating the lever signals to provide a boom command signal and a stick command signal, applying an algorithm-to-the boom command signal and the stick command signal, which the algorithm uses command signal mapping, and providing a modulating factor to the control device as a result of the algorithm.