Abstract: An automatic sewing machine comprising, a sewing needle, a work holder for moving a work piece relative the needle, and memory means having a plurality of randomly addressable storage locations for retaining data words. The sewing machine has address means for sequentially selecting the storage locations, and means responsive to the data words of the selected storage locations for moving the work holder and performing a sewing operation.

Abstract: An automatic sewing machine comprising, a sewing needle, a work holder for moving a work piece relative the needle, and memory means having a plurality of randomly addressable storage locations for retaining the data words. The sewing machine has address means for sequentially selecting the storage locations, and means responsive to the data words of the selected storage locations for moving the work holder and performing a sewing operation.

Abstract: The disclosed invention describes an automatic sewing machine which uses a randomly addressable storage element to store a sequence of instructions. The instructions describe a pattern through which a work holder securing a work piece is moved. Electrical circuitry reads the instructions stored in the storage element in a predetermined sequence and provides electrical signals dependent upon the sequence of instructions. A pair of stepping motors respond to the electrical signals to move the work holder. The electrical signals to the stepping motors are aperiodic in order to increase the machine cycle rate and to reduce the tendency of the stepping motors to oscillate. A closed loop actuatable homing device moves the work holder to a predetermined "home" position prior to reading any of the sequence of instructions. Thereafter the work holder is moved according to the sequence of instructions in an open loop mode. Limit circuitry prevents the work holder from being moved beyond predetermined limits.

Abstract: The disclosed invention describes an automatic sewing machine which uses a randomly addressable storage element to store a sequence of instructions. The instructions describe a pattern through which a work holder securing a work piece is moved. Electrical circuitry reads the instructions stored in the storage element in a predetermined sequence and provides electrical signals dependent upon the sequence of instructions. A pair of stepping motors respond to the electrical signals to move the work holder. The electrical signals to the stepping motors are aperiodic in order to increase the machine cycle rate and to reduce the tendency of the stepping motors to oscillate. A closed loop actuatable homing device moves the work holder to a predetermined "home" position prior to reading any of the sequence of instructions. Thereafter the work holder is moved according to the sequence of instructions in an open loop mode. Limit circuitry prevents the work holder from being moved beyond predetermined limits.