An electronic circuit causes a motor to rotate the wiper arm one full rotational cycle each time a pulse is received from a robot controller as a component approaches the solder bath. The apparatus is attached by means of a support bracket to the side of an electric solder heater pot which contains a molten solder bath for use in tinning the leads of electrical components. A circular cam wheel is attached to the support bracket by means of support arms. The cam wheel guides the arm as it rotates on a Teflon slide bearing. The cam wheel is placed at an inclined angle relative to the surface of the solder bath so that as the arm rotates the blade will be dipped into the solder bath and then raised above the bath to clear the edge of the pot.
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See contact below. The invention described was made under a NASA contract. The idea is part of NASA's Technology Transfer Program and is available for licensing and commercialization.