A control system for controlling velocity of a contact line and height profile between a template and a substrate during imprinting of polymerizable material on the substrate, the contact line being defined by the edge of a contact plane, said plane corresponding to the position at which the surface the template and the substrate conform to each other, and the height profile being defined as the varying distance (d) between the template and the substrate within a region wherein the template and substrate are not in contact with each other, the control system comprising: an imprint head having a plurality of actuators capable of providing a predetermined amount of force to template; a chuck positioned adjacent to template and capable of providing a predetermined amount of pressure to template, the pre-determined amount of force and pre-determined amount of pressure providing an applied force and an applied pressure on template resulting in a first velocity of the contact line between template and substrate and a first height profile between template and substrate; at least one force sensor positioned between template and substrate and capable of providing a first signal of applied force and applied pressure on template; and, a controller in communication with the force sensor, actuators, and chuck, a spread camera in communication with the controller, the spread camera providing at least one image of the contact line to the controller, the controller being capable of: - receiving the at least one image of the contact line, - receiving the first signal from the force sensor and - processing the first signal and the image to provide a second signal to actuators and chuck, the second signal having an adjusted force and an adjusted pressure to provide a second velocity of the contact line between template and substrate and a second height profile between template and substrate, characterised in that, processing the image includes determining the velocity of contact line and the height profile between template and substrate. an imprint head having a plurality of actuators capable of providing a predetermined amount of force to template; a chuck positioned adjacent to template and capable of providing a predetermined amount of pressure to template, the pre-determined amount of force and pre-determined amount of pressure providing an applied force and an applied pressure on template resulting in a first velocity of the contact line between template and substrate and a first height profile between template and substrate; at least one force sensor positioned between template and substrate and capable of providing a first signal of applied force and applied pressure on template; and, a controller in communication with the force sensor, actuators, and chuck, a spread camera in communication with the controller, the spread camera providing at least one image of the contact line to the controller, the controller being capable of: - receiving the at least one image of the contact line, - receiving the first signal from the force sensor and - processing the first signal and the image to provide a second signal to actuators and chuck, the second signal having an adjusted force and an adjusted pressure to provide a second velocity of the contact line between template and substrate and a second height profile between template and substrate, characterised in that, processing the image includes determining the velocity of contact line and the height profile between template and substrate. - receiving the at least one image of the contact line, - receiving the first signal from the force sensor and - processing the first signal and the image to provide a second signal to actuators and chuck, the second signal having an adjusted force and an adjusted pressure to provide a second velocity of the contact line between template and substrate and a second height profile between template and substrate, characterised in that, processing the image includes determining the velocity of contact line and the height profile between template and substrate.