Coating applicator tool head used with automated device for repairing leading edge damage on wind turbine blade

A method for automatically repairing damage around a leading edge of a wind turbine blade connected to a wind turbine, the method comprising:

• coupling a coating applicator tool head to an articulated arm of a robotic maintenance device that has been positioned along the leading edge of the wind turbine blade such that the articulated arm can move the coating applicator tool head into position around a location containing damage on the wind turbine blade;
• actuating a drive associated with a supply container operatively connected with the coating applicator tool head to move actuators of the drive relative to corresponding chambers of the supply container which contain different components that can be mixed together to form a coating for the wind turbine blade, to thereby deliver a flow of the different components into a mixing element;
• mixing with the mixing element the flow of the different components to produce a flow of the coating which is delivered to a spreading tool;
• moving the coating applicator tool head with the articulated arm so that the spreading tool moves along surfaces of the wind turbine blade to apply layers of the coating to the surfaces of the wind turbine blade, thereby covering and repairing the damage on the wind turbine blade;
• controlling the actuators of the drive to supply the different components at a desired mix ratio adapted to produce the coating when mixed at the mixing element;
• and
• varying a speed of the drive to vary a flow rate of coating being dispensed onto the spreading tool, the flow rate being adjusted in accordance with a movement speed of the spreading tool so as to continuously apply the coating onto the spreading tool during operation of the coating applicator tool head.