Abstract: A sewing machine arrangement comprises a sewing machine, a motor for driving a spindle, and a motor for operating a two-axis drive mechanism. When the two-axis drive mechanism is driven at a maximum speed, processing is executed in which a speed (t) slower than the maximum speed is inserted by a program. Further, drive current flowing through the motor for driving the two-axis drive mechanism is set. A phase exciting method of a stepping motor is switched.

Abstract: In a method of and an apparatus for drivingly controlling an automatic sewing machine, the time for which a work holding unit is drivingly processed every seam lengths, the time from start of the drive processing of the work holding unit to the time at which the work holding unit starts movement, and the time of movement of the work holding unit are set whereby a drive signal of the work holding unit is controlled such that the work holding unit starts movement and is terminated in movement during a period for which a needle passes through a sewing material. Decision of the drive signal of the work holding unit is executed by a program with respect to all sewing speeds for all sewing lengths.

Abstract: An automatic sewing machine control device in which the movement of the presser unit which takes place while the thread take-up lever moves from the bottom dead point to the top dead point is minimized thereby to increase the tension of the upper thread. Even when the load weight applied to a bi-axial drive mechanism increases or the thickness of the sewing material changes, excellent seams can be formed. In a control device for an automatic sewing machine, a start timing unit is provided which starts the bi-axial drive mechanism with respective timing modes. A plurality of drive control data for a drive motor and stepping motors are stored in memory unit which correspond to the load weights applied to the bi-axial drive mechanism and the thicknesses of materials to be sewed.

Abstract: A control device for an automatic sewing machine in which a cloth presser unit holding a material to be sewed is moved according a predetermined pattern thereby to form a seam having a predetermined pattern. The control device controls the speed of rotation of the automatic sewing machine and the movement of the cloth presser unit with high accuracy to obtain seams which are excellent in quality.

Abstract: A control method and apparatus for controlling an automatic sewing machine having a plurality of memory units different in kind to record sewing patterns in which a particular one of these memory units is automatically selected, and an electric power supply for supplying power for an initial period of time upon occurrence of an electric power interruption is provided. The sewing operation may be externally controlled. The control method and the device for practicing the method can provide an automatic sewing machine which provides interchangeability of software and high reliability, and which can be readily operated on an automation line.

Abstract: An input device for an automatic sewing machine having an easel for tracing a pattern and numeric and function keys. A liquid crystal display prompts the operator to select an input mode and then to input numerical data. The selection and numerical input is performed by touching a cursor pen to selected ones of the keys. The liquid crystal displays the inputted data.

Abstract: An automatic sewing apparatus in which automatic sewing operations can be performed merely upon placing cassettes into which have been loaded cloth pieces to be sewn onto a first carrier unit and in which a variety of sewing operations can be performed. The apparatus includes plural sewing machines, each having a table movable according to a programmed sewing pattern, with the cassettes being receivable on this table. The first carrier units transport the cassettes in a predetermined direction, while second carrier units transport the cassettes received from the first carrier unit to corresponding ones of the sewing machines. The various sewing machines perform predetermined designated sewing operations on the cloth pieces held in the cassettes.

Abstract: An automatic sewing machine including a sewing machine mechanism head for foaming a seam (switch pattern) on a web, a web presser for pressing the web, a driving mechanism for moving the web presser along X and Y axes in accordance with a predetermined pattern, and a control device for controlling each of the above, wherein the control device determines the start position of sewing at a fixed initial position or another designated position within a sewing area in accordance with the setting of a switch. The start position of the seam pattern may be selected in accordance with the formation of the seam pattern and properties of the web to achieve a highly efficient sewing operation.

Abstract: An automatic sewing machine includes a cloth retainer for holding a material to be sewn and which is driven by a cloth retainer driving device. The cloth retainer driving device includes a cloth retainer positioning and holding mechanism detachably positioning and holding the cloth retainer, and a driving mechanism driving the positioning and holding mechanism to automatically perform holding and release of the cloth retainer. The driving mechanism drives the positioning and holding mechanism in response to an instruction signal supplied from a control device prior to the start of sewing to automatically positioning and hold the cloth retainer, and automatically releases the positioning and holding of the cloth retainer upon the completion of sewing.