Provided is an electronic cam pattern generation method in a synchronous control system which controls a secondary shaft in synchronization with a primary shaft position, the method including: a first step of setting a plurality of sections relative to the primary shaft position; a second step of setting a boundary condition for the plurality of sections; and a third step for generating, as a septic function of the primary shaft position in at least one section of the plurality of sections, an electronic cam pattern indicating a position of the secondary shaft on the basis of the boundary condition.
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