The single-needle lockstitch sewing machine with built-in servo-motor in the head and automatic functions for thread trimming, bartacking and needle positioning is designed for sewing light to medium materials. Due to the design of the thread take-up mechanism and the increased travel of the needle bar, this model can be applied to a wide range of materials. In addition, the machine is equipped with the well-known function of preventing needle breakage by controlling the angle of the main shaft, even during reverse operation.