Patent ID: 7983780

Claim:
A sewing machine, comprising: an input unit that inputs a thread cut instruction; a thread cutting mechanism that cuts a needle thread and a bobbin thread based on the thread cut instruction; a feed dog vertically moving mechanism that vertically drives a feed dog for feeding a workpiece cloth; a feed dog activating switch unit that switches the feed dog between an active state in which the feed dog is vertically driven by the feed dog vertically moving mechanism and an inactive state in which an upper surface of the feed dog is positioned in a lowered position below an upper surface of a needle plate provided in a sewing machine bed; a control unit that drives the thread cutting mechanism based on the thread cut instruction inputted from the input unit and that controls the feed dog activating switch unit to switch the feed dog to the inactive state in which the feed dog is positioned in the lowered position; and a feed dog position detection unit that detects a vertical position of the feed dog in the active state, wherein the control unit is controlled to switch the feed dog vertically moving mechanism to the inactive state when the feed dog is in the lowered position, based on an output of the feed dog position detection unit.