A motion control device for powering a hydraulic actuator , the motion control device comprising: a motion control unit adapted to be hydraulically connected to the hydraulic actuator, the motion control unit also being configured to be electrically connected to an electrical power source and fluidly connected to a hydraulic power source , the motion control unit including an electric motor/generator , a hydraulic pump/motor and at least one valve configured for allowing blended power from the electrical power source and the hydraulic power source to be transferred to the hydraulic actuator, wherein the electric motor/generator is mechanically coupled to the hydraulic pump/motor, wherein the hydraulic pump/motor includes a first port and a second port , wherein when the motion control unit is in a first configuration the hydraulic power source fluidly connects to the second port, the first port fluidly connects to a first side of the hydraulic actuator and a second side of the hydraulic actuator fluidly connects to a tank , and wherein when the motion control unit is in a second configuration the hydraulic power source fluidly connects to the second port, the first port fluidly connects to the second side of the hydraulic actuator and the first side of the hydraulic actuator fluidly connects to the tank, characterized in that , when the motion control unit is in a third configuration, the first port fluidly connects to one of the first and second sides of the actuator, the second port fluidly connects to the other of the first and second sides of the actuator, and the hydraulic power source and the tank are isolated from the motion control unit. a motion control unit adapted to be hydraulically connected to the hydraulic actuator, the motion control unit also being configured to be electrically connected to an electrical power source and fluidly connected to a hydraulic power source , the motion control unit including an electric motor/generator , a hydraulic pump/motor and at least one valve configured for allowing blended power from the electrical power source and the hydraulic power source to be transferred to the hydraulic actuator, wherein the electric motor/generator is mechanically coupled to the hydraulic pump/motor, wherein the hydraulic pump/motor includes a first port and a second port , wherein when the motion control unit is in a first configuration the hydraulic power source fluidly connects to the second port, the first port fluidly connects to a first side of the hydraulic actuator and a second side of the hydraulic actuator fluidly connects to a tank , and wherein when the motion control unit is in a second configuration the hydraulic power source fluidly connects to the second port, the first port fluidly connects to the second side of the hydraulic actuator and the first side of the hydraulic actuator fluidly connects to the tank, characterized in that , when the motion control unit is in a third configuration, the first port fluidly connects to one of the first and second sides of the actuator, the second port fluidly connects to the other of the first and second sides of the actuator, and the hydraulic power source and the tank are isolated from the motion control unit. <EOS>