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A Study on Dosa Making Machine and Dosa Making Process

The objective of the study was to design and fabricate a automatic dosa making machine for commercial purpose. Dosa is an unavoidable food item in most of the Indian homes. In this machine use of complex Programmable Logic Controller (PLC) circuits for various operations like pouring, scraping and spreading the flour is eliminated. With the addition of soya bean batter along with the rice and black gram batter, the calories of dosa and quality of dosa is enhanced. The addition of soya bean increases protein content and reduces carbohydrate in the dosa. Further, the change in composition of dosa flour and thickness variation in the dosa, requires considerable change in design parameters such as material selection, speed of rotation, heat input and viscosity of the batter spread on the pan. This equipment is capable of making a single large dosa which can be cut into small dosas.