A linear and rotary actuated liquid dispensing pump is provided which offers precise high speed dispensing of liquids and easy volume adjustability. The dispensing pump includes an inlet for receiving a supply of liquid, an outlet for dispensing a metered amount of liquid, and a cavity in communication with the inlet and outlet. The pump has a plunger disposed within a cavity for controlling the amount of liquid within the cavity. The pump also has a rotary actuator for rotating the plunger, and a linear actuator for actuating the plunger linearly within the cavity to control the fill and dispensing of liquid. A controller controls the linear and rotary actuators and allows operation input to adjust variables.