Abstract: A data storage unit configured to store a coordinate data of a needle location and an added coordinate data creating unit configured to create a new coordinate data by adding independent original values respectively to an X-coordinate value or a Y-coordinate value for each of the coordinate data stored in the data storage unit are provided. The added coordinate data creating unit makes the independent original values added respectively to the X-coordinate value or the Y-coordinate value of the coordinate data in one needle location same as the independent original values added respectively to the X-coordinate value or the Y-coordinate value of the coordinate data in the other needle location when a distance between the coordinate data of the one needle location and the coordinate data of the other needle location stored in the data storage unit is within a predetermined distance.

Abstract: A data storage unit configured to store a sewing order and a coordinate data of a needle location in association with each other; a coordinate data adding unit configured to create the coordinate data of a new needle location on a line connecting three or more continuous needle locations in a sewing order stored in the data storage unit in accordance with a distance from the needle locations located at both ends of the line to the needle location located at an inside of the both ends when the three or more continuous needle locations are on the line; and an added coordinate data creating unit configured to create a new coordinate data by adding independent original values to the X-coordinate value or the Y-coordinate value in each of the coordinate data are provided.

Abstract: The desired seams are formed while adding a hand-sewn taste to the sewing pattern without changing the tendency of the hand-sewn taste for the same pattern. A coordinate data storage unit for storing coordinate data which indicates a needle location of a pattern to be sewn, an addition value storage unit for storing an addition value which is added to each of the coordinate data, and an adjustment unit for adjusting the coordinate data or the addition value; and an added coordinate data creating unit for creating a new coordinate data where the pattern is deformed by adding the addition value adjusted by the adjustment unit to the coordinate data or by adding the addition value to the coordinate data adjusted by the adjustment unit or by adding the addition value adjusted by adjustment unit to the coordinate data adjusted by the adjustment unit are provided.

Abstract: First calculation section calculates, on the basis of sewing data, a sewing-progressing direction angle for rotating a rotary cylinder to orient an embroidering material, guided by a guide lever of a zigzag sewing head, in a sewing-progressing direction. Second calculation section adds or subtracts a zigzag-swinging angle to or from the sewing-progressing direction angle to thereby calculate a target rotational angle of the rotary cylinder. Swinging mechanism may be provided for swinging the guide lever relative to the rotary cylinder, and a swinging amount corresponding to the swinging angle of the rotary cylinder may be added to a width of zigzag-swinging by the swinging mechanism. Alternatively, every swinging movement necessary for zigzagging the embroidering material may be set by the swinging angle without the guide lever being caused to swing relative to the rotary cylinder.

Abstract: A sewing machine including an image capturing unit disposed at a position capable of capturing images of the stitches formed on the workpiece cloth and capturing images of the stitches at least from either upper and undersides of the workpiece cloth; an extracting section that extracts, from the image data of the stitches captured by the image capturing unit, a region occupied by an opposite side thread appearing at an interlace of the needle thread and the bobbin thread; a calculating section calculating an area of the extracted region; an evaluating section that evaluates a tension balance between the needle thread and the bobbin thread based on the area calculated by the calculating section; and a controller controlling the thread tension adjustment mechanism to modify the tension balance of the stitches based on a result of evaluation by the evaluating section.

Abstract: A sewing machine includes a needle bar to which a needle is attached, a needle bar rocking mechanism which rocks the needle bar, a needle plate having a needle hole through which the needle is passed, an imaging device which images a lower part of the needle bar, a setting section which sets a range of rocking motion of the needle bar based on an image obtained by the imaging device, and a control device which controls the needle bar rocking mechanism based on the range of rocking motion set by the setting section.

Abstract: A sewing machine including an image capturing unit disposed at a position capable of capturing images of the stitches formed on the workpiece cloth and capturing images of the stitches at least from either upper and undersides of the workpiece cloth; an extracting section that extracts, from the image data of the stitches captured by the image capturing unit, a region occupied by an opposite side thread appearing at an interlace of the needle thread and the bobbin thread; a calculating section calculating an area of the extracted region; an evaluating section that evaluates a tension balance between the needle thread and the bobbin thread based on the area calculated by the calculating section; and a controller controlling the thread tension adjustment mechanism to modify the tension balance of the stitches based on a result of evaluation by the evaluating section.

Abstract: A method and an arrangement for placing an embroidery in the desired position on a sewing material for embroidering on a sewing machine which has a memory for embroidery elements and a processor for reading stitch data for a selected embroidery element and for manoeuvring the sewing machine to execute stitches associated with the selected embroidery element on the sewing material, in which pattern points are assigned to the embroidery element and registered in the processor, and in which fabric points are marked on the sewing material at points where corresponding pattern points are to be located when embroidering, the sewing machine processor automatically orienting and scaling executed patterns of the embroidery element on the sewing material.

Abstract: A sewing apparatus such as sewing machine includes a needle bar, a needle bar rocking mechanism for rocking the needle bar, a thread cassette having a thread accommodating section for accommodating a thread, a cassette mount to which the thread cassette is detachably attached, a threading mechanism for passing the thread drawn from the thread cassette through a hole of a sewing needle mounted on the needle bard, a detector for detecting the thread cassette ejected from the cassette mount, and a needle bar position control unit controlling the needle bar rocking mechanism so that the needle bar is rocked so as to occupy a predetermined zigzag position, when the detector has detected the thread cassette ejected from the cassette mount.

Abstract: A sewing machine with pattern stitching function is disclosed, wherein pattern data may be optionally selected to control the swinging movement of the vertically reciprocating needle and the work feeding amount of the work feeding mechanism, thereby to form a pattern composed of a plurality of pattern elements, the selected pattern data being modified with respect to each of the pattern elements.

Abstract: A sewing machine with pattern stitching function is disclosed, wherein pattern data may be optionally selected to control the swinging movement of the vertically reciprocating needle and the work feeding amount of the work feeding mechanism, thereby to form a pattern composed of a plurality of pattern elements, the selected pattern data being modified with respect to each of the pattern elements.

Abstract: Embroidery pattern positioning apparatus and embroidering apparatus is disclosed, wherein a pattern is projected on a cloth F on which the pattern is embroidered. The projected pattern is moved on the cloth by operation of jog keys 6 to determine a position of the pattern where the pattern is stitched. In the meantime the original position of a carriage is adjusted or the position of the pattern is calculated and memorized in accordance with the moving amount of the pattern. This operation may be repeated as to each of plural patterns selected to be stitched such that a plurality of patterns may be stitched respectively at the positions determined and memorized.

Abstract: A sewing machine of the invention stores width dimensions and the reference needle penetration position dimensions, which all can be changed for writing and reading, according to the type of presser foot, in a memory. Based on the needle penetration position and the reference needle penetration position which are determined when the seam allowance width is set, the sewing machine calculates a distance between the left or right end of the presser foot and the position where stitches are made, and shows it on the display as the seam allowance width. Therefore, sewing can be made regarding the distance from the left or right end of the presser foot to the place where stitching is made as a seam allowance width, just by aligning the edge of the work cloth with the left or right end of the presser foot.

Abstract: A module (1) is removably and replaceably provided on a sewing machine for domestic use and includes an electronic memory unit (4) for storing of specific stitch patterns selectable to control drive arrangements included in the sewing machine. The memory unit (4) is insertable behind a transparent front (3) provided on the sewing machine and having a touch control keyboard (31). The side of the memory unit (4) which, when inserted, is turned outwards to be visible through the keyboard (31) of the front has preprinted pattern illustrations. Each of these pattern illustrations correspond to a touch key on the front keyboard.

Abstract: An embroidery data producing device produces embroidery data based on original pattern made up of continuous line components. The embroidery data is supplied to a household sewing machine for embroidering on cloth. A scanner reads an original image and producing pattern image data. Based on the pattern image data, fine-line data is produced, through either sequential fine-line processes or distance conversion processes, for each of the continuous line components. In the processes of extracting fine-line data, data on thickness of each continuous line component is stored in a RAM. An embroidery data is produced based on the data stored in the RAM and the fine-line data, and the embroidery data contains data on stitch width of zig-zag stitch used for the embroidery.

Abstract: The present invention stores the image data of an original image pattern read by an image reader in processed data storage means, and stores the calculation formulas for producing designs such as checkers and strip patterns in calculation formula storage means. And, the needle location data of a selected design is generated by substituting the line and column numbers of the image data in the calculation formulas stored in the calculation formula storage means. By this construction, within the image data, embroidering data of the design which is not affected by the visible outline thereof can be formed. In addition, by carrying out the logical AND between the data of the needle locations corresponding to a design and the image data of an original data, embroidering data of the design which is not affected by the visible outline of the image data is formed within the image data.

Abstract: A drive control apparatus for a driven machine is designed to easily check which of a plurality of parameters indicating the control characteristics of the driven machine have been changed from their factory-set initial values. Initial parameter values are stored in a list in a first memory and current parameter values are stored in a second memory. When a display request is given, the initial values of parameters stored in the first list in a control section are compared to the current values of the parameters stored in nonvolatile memory. The identity of the parameters that have been changed from their initial values are displayed on a liquid crystal display. Also, the stored initial value list is displayed.

Abstract: A pattern data processing device processes a pattern data adapted for controlling a sewing machine to attain a relative movement between a cloth to be stitched and a sewing needle of the sewing machine thereby forming a desired stitch pattern on the cloth.

Abstract: A process for determining coordinate values of touchdown sites of a needle for forming sewing patterns with an electronically controlled sewing machine, which is equipped with a feed dog performing only relatively small amounts of displacement and with a needle pivotable in one direction of displacement of the feed dog. The coordinate values for a straight seam section, the consecutive touchdown points of the needle, are determined when the maximum amount of feed of the feed dog in the X coordinate direction and/or the sum of the maximum amount of the lateral movement of the needle which is possible at a given needle position and the maximum amount of feed of the feed dog in the Y coordinate direction is exceeded. The seam section is subdivided by equidistant intermediate touchdown sites, the distances between which in the direction of movement of the needle are composed of a constant percentage of the lateral movement of the needle and of a constant feed percentage of the feed dog.

Abstract: In a sewing machine, a needle and a work fabric are relatively moved in X and Y directions according to driving data indicative of a needle location. An external ROM, which functions as an external memory, preliminarily stores compressed stitch data or compressed display data, and also preliminarily stores a program for converting the compressed stitch data into the driving data indicative of the needle location or a program for converting the compressed display data into dot pattern data. The manner of compression of the stitch data and the display data is not limited, thereby improving the flexibility of the external memory.

Abstract: A data preparing apparatus includes an input device for inputting coordinate data such as a configuration and pattern to be processed and processing conditions, a memory device for converting the coordinate data inputted by the input device into variable coordinate data varying relatively according to the processing conditions and storing the variable coordinate data as a pattern data for processing, a predicting device for predicting a processing information resulting from a processing performed on the basis of the pattern data stored in the memory device and an output device for outputting the processing information obtained by the predicting device. The processing information includes at least one of a processing time, an area to be processed and a processing path. The predicting device calculates a processing time according to a preset processing rate.

Abstract: A method for controlling a computerized sewing machine which enables designs or patterns of modified length with respect to the standard value of each original design or pattern available to be sewn while retaining the density of stitches and the general shape of the original design. Algorithms are utilized indicating, for each block of stitches included in the original design or pattern, the number of times that this block is to be sewn to obtain the design of modified length. The microprocessor sewing machine using the method of the invention includes means requiring the microprocessor to read ongoing instructions repeatedly for at least certain blocks among the block of stitches for the basic design or pattern.

Abstract: In the pattern sewing machine comprising a pattern selector for selecting and combining pattern units such as characters and symbols and a controller for driving a sewing mechanism and a feeding mechanism to form the combination of pattern units selected by the pattern selector, the controller is provided with a diagonal placing unit for placing one pattern unit in a diagonal direction relative to another pattern unit adjacent thereto when the two adjacent pattern units are sewn in series.

Abstract: An edge tracing sewing machine includes a reciprocable needle bar having a needle at a lower end, a forward feed driving device for feeding a work fabric in a sewing direction, a lateral feed driving device for feeding the work fabric in a lateral direction perpendicular ot the sewing direction, a fabric-edge position detector, a tracing width setting device, and a control device. The control device determines a lateral feed amount based on signals from the fabric-edge position detector and the tracing width setting device. The control device operates the lateral feed driving device plural times until the work fabric is fed by the determined lateral feed amount by the lateral feed driving device, if the determined laterla feed amount is greater than a maximum lateral feed pitch of the lateral feed driving device.

Abstract: A stitch pattern sewing machine includes a ROM for storing triple stitch pattern data for a large size pattern and single stitch pattern data for a small size pattern for each pattern of a plurality of patterns, a pattern selecting unit for selecting one of the patterns, an enlargement switch for enlarging a size of the pattern selected by the pattern selecting unit, a reduction switch for reducing the size of the pattern selected by the pattern selecting unit, a CPU, and a driving unit for forming a stitch. The CPU selects one of the triple stitch pattern data and the single stitch data based on size of the pattern. The CPU controls the driving unit based on the selected pattern data and size of the pattern. As a result, stitch thickness can be varied with pattern size to maintain a desired appearance.

Abstract: A sewing machine capable of setting a feed pitch of a first stitch on zero in a work piece at the beginning of sewing operation, comprises: a needle reciprocable in a vertical direction and joggable in a lateral direction; a feed means which cooperates with a presser foot in operation in synchronism with the needle for feeding a work piece at a desired rate; a stitch-forming mechanism driven by a main drive motor of the sewing machine; a motor-operation detecting means for detecting operating conditions of the main drive motor; a needle-position detecting means for detecting a position of the needle having been disposed above a throat plate; and a presser-foot position detecting means for detecting a position of the presser foot relative to the throat plate, whereby a feed pitch of the feed means is set on zero at a time when the motor-operation detecting means detects a stopping condition of the main drive motor, so that a condition in which the feed pitch of the feed means is set on zero is held until a sub

Abstract: A fabric edge trace stitching system in combination with an electronically controlled zigzag sewing machine comprising a driving actuator for changing the relative position of the needle and the work fabric in the direction perpendicular to the fabric feed direction, is for forming a seam tracing along an edge of the work fabric, and comprises a fabric edge detecting device, a trace width setting device, a signal compensating device for forming a smooth and approximate seam as the plain seam or a precise seam as the stitch seam, a stitch position control decive for controlling a stitching position of the needle through a swing control device, and a switching device for selecting one of the signal processing devices in the signal compensating device.

Abstract: Alphanumeric characters are stitched along a curve produced by the R-X coordinate transformation wherein the X-coordinate is curved in relation with a radius while the Y-coordinate remains straight. The characters to be stitched on a fabric are arranged within concentric curves which are determined by a position of the center of the arc with respect to a frame of the alphabetic or numeric character, the height of the frame and the radius of the arc.

Abstract: An apparatus of a sewing machine for indicating elongated pattern length is disclosed, wherein memory means normally stores a number of pattern data for forming the stitches of different patterns with a standard stitch amplitude and a standard fabric feed pitch, pattern selection means is selectively operated to select a desired pattern from the pattern data storing memory, amplitude setting means is optionally operated to set the amplitude value of the selected pattern, indication means indicates an amplitude value of the selected pattern set by the amplitude setting means, pattern elongation setting means is optionally operated to set a pattern elongating magnification value, discrimination means judges whether the selected pattern is elongatable or not, and means is provided for displaying the pattern elongating magnification value in the indicating means.

Abstract: In a sewing machine provided with a needle position adjusting device to position a needle relative to a basic line, a switching arrangement is provided to switch the needle position adjusting means from a needle amplitude adjusting mode to a mode of adjusting the needle basic line, whereby one adjusting device may be used as a needle amplitude adjusting device for ordinary stitching patterns and as a needle basic line-adjusting device for specific stitching patterns.

Abstract: The present invention relates to a data input device for an embroidering sewing machine, and more particularly to an input device having an editing function for an input pattern.

Abstract: A sewing machine having an edge sensor for detecting an edge of a workpiece in a lateral direction perpendicular to the workpiece feed direction, and a tracing control device for controlling a relative position between a needle and the workpiece in the lateral direction to form stitches along a line a predetermined distance away from the workpiece edge. A motor to change a relative position between the workpiece edge and the sensor is operated from a first limit position to a second limit position to obtain first output signals of the sensor, and an average of a maximum and a minimum value of the first output signals is calculated. The motor is then operated from the second limit position toward the first limit position to obtain second output signals of the sensor. A first and a second average position signal are determined such that the average position signals correspond to the average value of the maximum and minimum values of the first output signals.

Abstract: In order to correct the asynchronous state of a feed pulse motor of a sewing machine used to reciprocate a feed for feeding a fabric to a sewing needle, a feed control apparatus is provided which switches the pulse motor to a predetermined excited state when the feed dog abuts a stopper on the downstream side of feed motion at the start up of sewing operation so as to locate the feed dog at a known reference position. Additionally, the feed control apparatus switches the pulse motor to another predetermined excited state when the feed dog abuts a stopper on the upstream side of the feed motion so as to locate the feed dog at a known position during consecutive sewing operation.

Abstract: Optimum sewing machine setting values for a plurality of stitch patterns to be adjusted by adjusting means, and display information data of messages explaining at least either the manner of sewing operation for the stitch patterns or methods of forming the stitch patterns are stored in a memory at addresses respectively corresponding to the stitch patterns. Relevant setting values are displayed when a stitch pattern is selected on a display unit and the indication of the setting values is changed for the indication of a message when a changeover member is operated.

Abstract: Method and apparatus for preparing sewing data for an automatic sewing apparatus which embroiders an embroidery pattern on cloth using a zigzag stitch while moving one or both of a cloth retainer and a sewing machine relative to each other. When a pattern corresponding to a basic sewing data group stored in a memory device is to be embroidered either magnified or reduced in size, in order to set a desired stitch density (P), which is the pitch of the stitches, three items of basic sewing data are read out from the memory device as one processing unit. After these items of data have been multiplied by a specified magnification to obtain sewing data (A,B,C), a pattern range which corresponds to the sewing data is divided by a particular stitch density in order to calculate correction data ( .circle.1 to .circle.21 ).

Abstract: The start and end timing of fabric feed in a sewing machine greatly affects the tightening of needle thread, that is, the sewing quality. Among the electronically controlled zigzag sewing machines, those equipped with feed means directly driven by a pulse motor supplied with command pulses, it has become possible to control freely the start and end timing of fabric feed.

Abstract: A system and method for stitching characters along a curve is disclosed. The alphabetic characters, numerals, symbols, designs, etc. to be sewn or embroidered, along with various other parameters, such as the initial radius and angular displacement of the curve on which the selected characters, etc. are to be stitched, are entered into the system by the operator. The system transforms the stitch points within each selected character, etc. into a new set of stitch points such that the selected characters, etc. are projected into a curve having the desired initial radius and initial angular displacement.

Abstract: Method and apparatus for preparing sewing data for an automatic sewing apparatus which embroiders an embroidery pattern on cloth using a zigzag chain stitch while moving one or both of a cloth retainer and a sewing machine relative to each other. When a pattern corresponding to a basic sewing data group stored in a memory device is to be embroidered either magnified or reduced in size, in order to set a desired stitch density (P), which is the pitch of the stitches, three items of basic sewing data are read out from the memory device as one processing unit. After these items of data have been multiplied by a specified magnification to obtain sewing data (A,B,C), a pattern range which corresponds to the sewing data is divided by a particular stitch density in order to calculate correction data ( .circle.1 to .circle.21 ).

Abstract: A feed device drives a feed dog directly by a stepping motor having a predetermined number P of excitation modes, and devised so that the output shaft thereof is turned by a unit amount S when the excitation mode is changed over. A stopper is disposed so as to define the range of the horizontal feed motion of the feed dog. An excitation control means excites the stepping motor in a specific excitation mode at the start or at the end of horizontal feed operation. The specific excitation mode is one of the excitation modes in which the stepping motor is excited while the output shaft thereof is turned by an amount P.multidot.S/2 from a position where the output shaft of the stepping motor is restrained from rotation by the stopper.

Abstract: In a computerized sewing machine, initial coordinate values of amplitudes of needle drops (the stitching width) for line-and bar tacks of a buttonhole are stored in a ROM. Desired stitching amplitude values and cut width values are selected by external setting means on the machine and stored in a RAM. The stored desired data are adjusted to coordinates of the present initial values in such a manner that selected needle drop or stitching amplitude values are offset in parallel relative to a center value of a maximum stitching amplitude available in the machine. The widths of stitches of the left-and right line tacks remain unchanged for different cut widths of a buttonhole and only the amplitudes of the bar tack stitches are adjusted to a particular cut width.

Abstract: If a predetermined pattern to be stitched exceeds a maximum amplitude amount available in a sewing machine, such a pattern is divided into appropriate shapes, and the divided shapes are stored in an electronic memory as pattern forming elements to be sized within the maximum amplitude amount. The pattern forming elements are classified into a first pattern group which is symmetrical with respect to a central basic line, a second pattern group which is formed at a left or right side of the central basic line, and a third pattern group which is asymmetrical with respect to the central basic line. The pattern forming elements are used in common to some of other predetermined patterns, and when those are selectively combined, the predetermined pattern may be produced into a stitched pattern.

Abstract: An electronic pattern stitch sewing machine is disclosed in which stitch control letter pattern data is stored to produce letters in a laterally or vertically readable first orientation and in which stitch coordinate mode changing data is stored to modify the letter pattern data to change the stitch coordinates of the letter patterns thereby orienting the letters in a direction perpendicular to said first orientation.

Abstract: A stitch condition setting device for an electronically controlled sewing machine that forms stitch patterns and has a reciprocating needle, a fabric feed and an electronic memory to store stitch control signals, the stitch condition setting device having an apparatus for separately designating a change in a needle amplitude amount and a fabric feed amount in accordance with a selected stitch pattern, an apparatus for switching the designating apparatus between designating the change in needle amplitude amount and designating the change in fabric feed amount; and an apparatus responsive to the designating apparatus and the switching apparatus for changing the needle amplitude amount and the fabric feed amount in accordance with the selected stitch pattern.

Abstract: This invention relates to a computer controlled sewing machine, and more particularly to such a sewing machine which is incorporated therein with a plurality of feed adjusting switches for giving information to a micro-computer housed in the sewing machine, in order to correct irregularities of forward and backward feed amounts.

Abstract: In a sewing machine with a microcomputer controlled step motor for the control of the magnitude and direction of the feeding action of a cloth feeder, the microcomputer is connected, via a buffer and a D/A converter, to the non-inverting input of a comparator which controls the turn-on and turn-off as well as the current intensity of each phase winding of the step motor and whose inverting input is connected to a discriminating element disposed in the phase circuit, for the step setting correction and for the torque intensification of the step motor. To adapt the correction possibilities to the step motor parameters, the D/A converter has four input stages whose biggest stage is connected to the corresponding output stage of the buffer via a voltage divider.

Abstract: In stitching operation with an electronic sewing machine storing a plurality of stitch control data, a fabric feeding amount for a specific pattern composed of densely arranged zigzag stitches is automatically controlled in a selective one of normal mode and alternate mode. The fabric feeding amount is usually controlled in the normal mode whereby a fabric feeding amount of a predetermined value or a manually selected value is constantly applied to every stitch of the pattern. The normal feed control mode is switched to the alternate feed control mode when the operator selects a fabric feeding amount smaller than a predetermined critical value, in which case the selected pattern composed of densely arranged zigzag stitches is produced with the fabric being fed in an amount double the selected value each time an alternate one of the zigzag stitches is produced.

Abstract: A control circuit of an electronic sewing machine is operated such that, in response to a pulse signal determining the common base stitching line of a selected combination of stitch patterns having different base stitching lines, a corresponding base stitching line control data is read out from an electronic memory for producing the selected combination of stitch patterns in series in reference to the single base stitching line thus determined.

Abstract: A sewing machine for stitching a stitch pattern having a predetermined shape in accordance with stitch pattern data, comprising a memory circuit for storing an initial value indicating the needle swing position for stitch start, a basic stitch number indicating the stitch number required for the formation of one pattern, and quantity of needle swing every stitch pattern, a counter in which the high-order digit portion and the low-order digit portion have the same number of digits, and a control circuit for setting said basic needle number into the low-order digit portion of said counter, adding logic value "1" to each digit of the low-order digit portion, determining a needle swing position in accordance with the arithmetic data, and conducting automatic stitch of said stitch pattern in accordance with the needle swing position thus determined.

Abstract: A stitching adjustment device for a sewing machine having a stitching width adjusting device for controlling a pattern forming device by means of an electronic control device, the stitching adjustment device consisting of a means for adjusting amplitude external from the sewing machine and a means for detachably connecting the amplitude adjusting means with the electronic control device so that when connected the amplitude adjusting means controls the stitching instead of the stitching width adjusting device.

Abstract: An improved household type sewing machine having a needle bar and a feed dog wherein an actuator adjusts the transverse position of the needle bar and the positional displacement of the feed dog in response to control signals provided thereto, in which a microcomputer integrated circuit is provided for controlling the machine in response to keyboard selectable pattern and control information stored in a static memory which is interchangeable with other memory configurations to provide different patterns, such as alphabetic stitch patterns. The keyboard contains a numeric display with each of the patterns having a corresponding numeric equivalent which is displayed on the keyboard to indicate which pattern is selected.