An independent automatic shedding system that automatically allows any combination of loads to powered under limited power availability without overloading the generator or rewiring, while contributing to the stability of the power grid. A target detection unit detects a peak value from the intensities of beat frequencies, and then detects an existence of the target. The lower surface is engaged on a poppet valve which moves up and down. A second image may be captured using the second exposure length. By switching the two modes the large size fabric winding machine does not have to be disassembled in response to the fabric of different characteristics.