JPS6042737B2 - Automatic embroidery machine control device - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an improvement in a control device for an automatic embroidery sewing machine, and more particularly to a control system for supplying embroidery machine control data using a magnetic tape. By controlling the two servo motors, the movement of the locus that traces the planar figure, which is a composite of the two coordinate component movements by the respective drive outputs, is stored in advance in synchronization with the rise and fall of the needle for each stitch of the sewing machine operation. In a sewing machine that performs automatic embroidery stitching by transmitting control data stored in the embroidery frame corresponding to the embroidery frame operation amount to the fabric frame support mechanism and repeating the operation,
It is impractical to provide a memory that stores control data with a large storage capacity to meet the demands of various embroidery patterns, and it is difficult to say that it is efficient. One method is to adopt a system that reads the perforated tape in synchronization with the sewing machine, but in the case of perforated tape, there is a risk of damage to the tape due to poor handling or long-term use. There are things to do,
In addition, the cost of the perforated tape itself and the cost of the synchronous reading mechanism are generally relatively high, and if the tape is to be popularized for household use, for example, it is not sufficient in terms of ease of handling. It was impossible to say that. The present invention attempts to input control data for various types of embroidery using easy-to-handle set-type magnetic tapes, and in particular, in this case, it is necessary to synchronize the operation of the sewing machine and the data reading from the magnetic tapes. Since it is difficult to read data, the read data is temporarily stored in static memory inside the sewing machine. However, in the present invention, the read data is stored alternately in two relatively small memories as static memory inside the sewing machine. The contents of the magnetic tape are read in, and the data that has just been stored is immediately read out for reading and embroidery operation, and the drive of the magnetic tape reader is simultaneously controlled in the computer control sequence that commands the sewing machine control. In reality, the tape reader operates intermittently, but when looking at individual embroidery patterns, it is characterized by automatic embroidery control using magnetic tape, which appears to be continuous online control. Therefore, it is an object of the present invention to provide an automatic embroidery sewing machine of a compact style that is easy to handle and economically advantageous. An embodiment will be described with reference to the figures. However, in the present invention, an organic control means for inputting control data from the magnetic tape and controlling the embroidery frame drive as described above is provided for a sewing machine equipped with an embroidery frame support and drive mechanism that provides trajectory movement of a planar figure. The main point is to give. However, for convenience, we will first briefly describe the embroidery frame support and drive mechanism of the sewing machine. In FIG. 1, inside a console 1a formed on the front slope of the arm support of a sewing machine 1 having a normal lockstitch function, a magnetic tape is used as a storage medium as described later. The embroidery data is read from the sewing machine bed 1b, and in synchronization with the vertical movement of the sewing machine needle bar 2, the embroidery data is transmitted through the control of two servo motors installed in the sewing machine bed 1b for each stitch during operation of the sewing machine. , a control circuit is built in to give the embroidery frame 6 above the bed 1b a locus motion of the planar figure. The locus movement of the planar figure is based on the XY orthogonal coordinate system, and parallel slits 3 and 4 are provided on the upper surface of the bed 1b, extending in the left-right direction and arranged in two rows in the front and back. A Y-axis guide rod 5 is disposed above the bed 1b in a posture that bridges the slits 3 and 4 at right angles, and the Y-axis guide rod 5 is translated left and right along the slits 3 and 4 while maintaining the orthogonal posture. , and an embroidery frame drive mechanism for sliding the traveler 7 supported thereon back and forth along the Y-axis guide rod 5 is installed in the bed 1b. The traveler 7 removably supports the embroidery frame 6 by appropriate support means not shown in detail. The Y-axis guide rod 5 has front and rear carriers 8 supported at both its front and rear ends.
9 pass through each of the slits 3 and 4 to form the bed 1.
It is supported inside b so that it can slide left and right. As mentioned above, bed 1 of the arm support section also serves as the casing for the control circuit.
The wall surface of the right pocket along plane b is formed into a recess so that the entire Y-axis guide rod 5 and traveler 7 supported by the front and rear gear wheels 8 and 9 can be accommodated snugly. The right ends of each of the slits 3 and 4 are inserted deep into the pocket 1c so that the carriers 8 and 9 can be introduced into the recessed pocket 1c. The support mechanism is shown in Figs. 2 and 3, and the details of the structure shown in these figures are disclosed in Utility Model Application No. 54-54447 filed earlier by the present applicant. Since this part is not the gist of the present invention, to briefly describe it, the front brackets 10 and 11 existing in the bed 1b are supported, and the X-axis guide is parallel to the front slit 3. A rod 12 is supported, and a front carrier 8 is slidably guided and supported along the X-axis guide rod 12.The Y-axis guide rod 5 is supported by the X-axis guide rod 1.
In order to move the carriers 8 and 9 from side to side in a position orthogonal to the carriers 2, the carriers 8 and 9 are provided with means for linking the front and rear carriers 8 and 9 to move as one body. That is, inside the bed 1b, rear brackets 13 and 14 are supported at both ends of the lower part of the rear slit 4, and idler rolls 15 and 16, which are respectively pivotally supported on the left rear bracket 13 and the right side bracket 11, are supported at both ends thereof. via, and stretched in a Z-shape,
By means of the front and rear connecting cables 17 supported on the front and rear carriers 8 and 9 at both ends, both carriers always move in the same direction even when a traction force is applied to either of the carriers 8 or 9.
Two motor brackets 18, 1 are surrounded by four brackets 10, 11, 13, 14 on the front, rear, left and right sides.
9 is supported within the bed 1b, and an X-axis servo motor 20 and a Y-axis servo motor 21 are supported on each of them. One end 22 of the X-axis drive cable 22 wound around the capstan roll 20a supported on the output shaft of the X-axis servo motor 20
a is fixed to the left front bracket 10, and the other end is fixed to the right rear bracket 14. During the tensioning route, the idler rolls 23 and 24 pivoted on the two brackets 10 and 14 are used as fixed pulleys, and the idler rolls 25 and 26 pivoted on the front and rear carriers 8 and 9 are fixed pulleys. This is a configuration in which two sets of pulley devices are used as movable pulleys, and the operating directions of the pulleys are opposite to each other, and the driving cable ends of both pulleys are connected at the X-axis capstan roll 20a. When the X-axis drive cable 22 is pulled to either side by operation, the front and rear carriers 8 and 9, each supported with a movable pulley as described above, move to the front left in the case of the front carrier 8. to the side of the bracket 10 and the rear carrier 9
In this case, a traction force is applied to each of them so as to approach the right rear bracket 14, and under the action of the front and rear connecting cables 17 described above, in either case, the Y-axis guide rod 5 is translated from side to side without being tilted. . The same goes for the back and forth movement of the travel 7 along the Y-axis guide rod 5 by the operation of the Y-axis servo motor 21; , 29 are arranged in parallel on the travel 7, and the ones corresponding to fixed pulleys are installed on one side at the idler roll 30 pivotally attached to the right front bracket 11 and on the other side at the right rear bracket 14 (not shown). Both cable ends 2 of the Y-axis driving cable 27 are guided and supported.
7a and 27b are fixed to the left front bracket 10 and the left rear bracket 13, respectively. In this Y-axis component cable tensioning path, the Y-axis guide rod 5 is allowed to slide left and right without causing the traveler 7 to slide in the front-back direction, and
In order to move the traveler 7 back and forth when the cable is guided to either side, each of the front and rear carriers 8 and 9 has a traveler 7 in each perpendicular direction from the part of the cable parallel to the X-axis direction. Four guide rolls 31a to 31c (31d is visible at the back of 31a) are installed so that the cables pass through the slits 3 and 4 and rise above the bed 1b. ) and 32. With this means, for example, when only the X-axis drive cable 17 is pulled and the Y-axis servo motor 21 is at rest, the movable idlers 28 and 29 rotate on the travel 7, but no back-and-forth sliding occurs. ,Y
Since the shaft guide rod 5 moves left and right as it is, the movements of both coordinate components are not restricted to each other. As a result, the embroidery frame 6 is a composite of the movements of both components. Given the locus motion of a plane figure. Then, for each stitch of operation of this sewing machine 1, during the half period when the needle is coming out of the work cloth, as will be described later, the motor rotation is controlled according to the control data corresponding to each stitch that is programmed. Embroidery stitching is progressed by applying power to both servo motors 20 and 21. The sewing machine 1 equipped with such an automatic embroidery frame drive mechanism is provided with a means for inputting embroidery pattern data from a magnetic tape at the front of the console 1a side. Preferably, a cassette type magnetic tape that is easily replaced is used as the magnetic tape, and as shown in FIG. A switch 35a for commanding and operating is provided. Further, inside this sewing machine 1, a synchronization signal generator 37 is mounted on a main shaft 36 that drives the needle bar 2, and detects the rotation of the main shaft 36 and generates a synchronization signal. Next, to explain the control circuit, the fourth
In the circuit shown in the figure, the central microcomputer 33 is of a conventional type and includes a ROM 38a which is a fixed data memory in which its own data processing calculation program is stored. Normally, they should be configured in this set of microcomputers, but since they are part of the gist of the present invention, they are shown together in a separate frame for convenience. An embroidery data memory circuit 39 is provided.The embroidery data memory circuit 39 has a capacity of 256 /
It has a first memory 40 and a second memory 41 consisting of two RAM memory elements, each of which has a write address counter 42 for specifying an address for writing and a counter for reading. Also read address counter 4
3. It further includes a discriminator 4 which has the role of providing a switching command for controlling which side of the two memories 40 and 41 to be in an operating state and storing the state. One flip-flop is sufficient for the discriminator 44, and it will be abbreviated as DRA in the explanation of the control sequence to be described later. Similarly, the first memo 1J40 is RAM
The second memory 41 is RAMl, the write address counter 42 is WACl, and the read address counter 43 is R
Like AC, these are abbreviated in the flowcharts explaining the control sequence. The output of the microcomputer 38 controls, via amplifiers 45 and 46, a cassette tape drive motor 47 of one data reader 34 and a sewing machine motor 48 that drives the main shaft 36 of the sewing machine. The operation output signals of the two coordinate components for each stitch based on the data read from the two memories 40 and 41, which is an important function in the role of output operation of the microcomputer 38, are generated by the X-axis drive circuit 49 and the Y-axis drive circuit 50. is given as a control input to These two drive circuits 49,
50 has the same configuration, and to explain it in terms of the Y axis,
Among the positive and negative signals given as the operation output signal of the corresponding coordinate component and the numerical signal corresponding to the amount of movement thereof, the numerical signal YDA
is connected to the preset input terminal PS of the down counter 51, and is set by its load input terminal PS. Using an output pulse from a separately provided oscillator 52 as a clock pulse, a subtraction operation is performed via a gate 53, and the AND gate 53 is closed at the borrow output at the end of the subtraction. The clock pulse passing through the AND gate 53 is sent to the pulse distributor 56 through the side of the AND gates 54 and 55 whose opening gates are controlled in accordance with the positive and negative signals YP and YM. added to the input. The pulse distributor 56 is a known device that functions to switch the excitation phase according to the direction of rotation when the servo motor 21 is a pulse motor as in a general example. The output signal of the synchronizing signal generator 37 and the operation signal of the start switch 35 are connected to the input side of the microcomputer 38, and the signals read from the cassette tape 33 are converted into 1 byte of 8 bits each. A data input circuit 57 is connected to one of the two embroidery data memories 40 and 41 for each unit word in accordance with the state of the discriminator 44. In order to explain the data input circuit 57, it is first necessary to show a mode in which data corresponding to individual embroidery patterns is recorded on this cassette tape. The tape recording format is shown schematically in FIG. The required length of magnetic tape for embroidery patterns is determined according to the number of stitches that make up each pattern, but in this example, each stitch is represented by 3 bytes of data, and a maximum of 84 stitches can be used. - As a data block, a required number of data blocks are connected to form one embroidery pattern data.On the magnetic tape, there is a no-signal zone (shown as IBG in Figure 5) between each data block. ), data zones DATA (0-n) of the required number of blocks are lined up between each block, and a long I field comes at the end to complete one pattern of data. However, the length j of the last data zone DATA(n) will end up being shorter than the length of 8 trees in most cases. Each byte (hereinafter, this memory unit consisting of 8 bits is referred to as a word) uses its leading bit to identify whether each word is control data or numerical data.
Regarding the structure of control data and numerical data, the first of the three words that correspond to one stitch is the control data, and the following two words are each There are various numerical data that determine the amount of embroidery frame movement for the X-axis component and Y-axis component.The capacity of each numerical data is as follows: The first digit of the word is used for data identification as described above, so the remaining 7 digits are used. It has a maximum resolution of 127 steps. That is, 1 step is 0.1Tn! ! When L, each stitch of one component can move the frame by a maximum of 12.7 TmL. The numerical data for both the X and Y axis components does not have a sign bit that controls each direction of movement, but the positive or negative of the X axis component is determined by the contents of the second bit of the control data for each stitch, and 3 The positive and negative values of the Y-axis component, that is, the direction of movement, are indicated by the second one. Furthermore, because of the structure of the lower four digits of the control data, if the contents are all 0, the following two words are numerical data and form a normal stitch forming signal for -stitches. , if the contents of the lower four digits are other than zero, the control data at this time has the meaning of a special command signal. In the case where the word of control data is not followed by normal numerical data, only the parts related to the gist of the present invention will be described as follows.
In the embodiment shown in FIG.
] means the end of each data block, and [87] means the end of all data, that is, the end of embroidery control. Although it is beyond the scope of this article, I will briefly explain when it is not used as a signal indicating the end of data, for example, in a jump instruction. Jumping is not shown in this embodiment, but when a certain stitch is abnormally long for one stitch of normal embroidery, the needle bar 2 is temporarily held in the raised position. Only the embroidery frame continues to move. Figure 6 shows the data organization of each data block in this way.
Control data [87] appears in a certain word of the n-th block, indicating that one piece of embroidery data is constructed. In this case, the 253rd word of each data block is the address NO. [86] indicating the block delimiter is recorded in 252, and 0 to 25
As described above, eight trees worth of data are stored in the word in the range 1. Also, the data for each block is stored in the RA mentioned above.
The data is stored alternately in two memories 40 and 41 of MO/RAM 11, each of which has a capacity of 256 bytes. Returning again to FIG. 4, the data input circuit 5 along with the timing chart of FIG.
7 will be explained. To put it simply, the role of the input circuit 57 is to record on the cassette tape 33 in which each bit is connected vertically, but to separate the bits into 8 bits and input the I/O to the X-axis microcomputer 38. It is input to the 0 port, and there is also a function that reads the contents of each bit while determining whether it is (A) or [1]. The data recording mode of the cassette tape 33 corresponds to a binary signal depending on the signal recording width. That is, the reading head 33a detects the rising and falling edges of the signal on the tape, and uses these detection circuits 58 and 59 to generate set and reset signals for the flip-flop 60, respectively. By comparing the time widths of the 60 set operations and reset operations, the content of the binary signal of each bit can be determined.

[0]
or [1]. In order to measure each time width, an AND element 61 whose gate is opened at the Q output of the flip-flop 60 and a similar σMD element 62 corresponding to the O output
The output of a monostable multivibrator 66 is provided with a pair of counters 64 and 65 for counting clock pulses from an oscillator 63, respectively, and generates pulses of minute width in response to the output of the rising edge detection circuit 59 of the tape recording signal. At the time of reset by the pulse, the counter 64 first starts counting, and when this counting is stopped by the output of the fall detection circuit 58, the counter 65 starts counting at the same time. Then, based on the output of the next rising edge detection circuit, the comparison output that determines the magnitude of the count values of both counters 64 and 65 in the comparator 67 at that time is

It is input to the storage input terminal of the shift register 68 in the form of [0] or [1]. The rising edge detection signal that caused the shift register 68 to shift in this manner is also given as a counting force to another counter 69.
The shift register 68 has a length of 8 digits, and the counter 69 also generates a count output in octal notation, so that every time the shift register 68 performs a shift operation eight times, the current shift register is The contents of the read data 68 are input to the microcomputer 38. The end of a data block is detected by an end sensor 70 consisting of another monostable multivibrator.
That is, the trigger input can be given by the output of either side of the rising edge detection circuit 58 or 59 of the tape recording signal.
An end sensor 70 with a somewhat larger excitation pulse width is connected via an 0R element 71, and while data continues to be read from the tape, the excitation state of the end sensor 70 is changed by repeatedly applied trigger input. persisted, and at the end of a data block or when all data has been read,
When the operating width of the monostable multivibrator due to the last excitation input has elapsed, a read completion signal is given to the I/O port of the microcomputer 38. Next, the operation of the above configuration will be explained using the flowchart shown in FIG. 8 and subsequent figures. In response to a start command, first, the contents of the discriminator 44 are initialized. As described above, the discriminator 44 is a flip-flop that selectively takes two operating states, and for convenience, these will be expressed as H and L below. The initial settings are made here. Subsequently, the start switch 35 is operated to ON, and in response to the ON operation, the process moves to the data reading subroutine shown in FIG. In the data reading routine, the contents of the discriminator 44 are checked once again, and since the first time is L as mentioned above, the discriminator 44 is set to H this time due to the affirmative judgment, and the first memory 40 The write address counter 42 is set to address the first address of . Then, a drive signal is applied to the amplifier 45 to drive the cassette tape drive motor 47, and the process returns to the main routine of FIG. Therefore, the termination sensor 70 is retained until the end of the excitation operation of the termination sensor 70, that is, at the time when the data for one data block is read into the first memory 40 from the cassette tape 33 via the data input circuit 57. When the operation becomes non-output, a drive signal is given to the amplifier 46 to control the sewing machine motor 48.
is activated, and the process returns to the data reading subroutine. Then, when the content of the discriminator 44 is checked, it is first set to H, so by the negative judgment, the content of the discriminator 44 is changed to L, and the first address of the second memory 41 is addressed. The write address counter 42 is set as desired, a cassette tape drive signal is issued in the same manner, and the process returns to the main routine. Then, it is checked whether the content of the discriminator 44 is L,
In this case, it is an affirmative judgment, and the first memory 4 is
The read address counter 43 is set to address the starting address of 0. The word of the stored contents of the addressed portion is read from memory 40, and as long as the word contents are neither hexadecimal [86] nor [87], the process moves to the data output subroutine of FIG. The data output operation means the drive circuit 4 for both X and Y axis components.
9, 50 to provide frame control data for embroidery,
Here, the second (sixth bit) and third (fifth bit) from the beginning of the control data, which is the given word.
, and set them to the positive and negative input terminals XP, XM of the X-axis drive circuit 49 and the same positive and negative input terminals YP, YM of the Y-axis component. The word of numerical data of the x-axis component is then read from the first memory 40 by advancing the read address;
This is the X axis. Preparation for output to the numeric output terminal PS to the drive circuit 49 is made. Further, the read address is advanced and the numeral output PS to the Y-axis drive circuit 50 is similarly prepared. Therefore, the terminal sensor 7
While the excitation state of 0 continues, it waits for the arrival of the rotational phase signal of the sewing machine main shaft 36 from the synchronization signal generator 37, and waits for the timing when the needle comes out of the work cloth (not shown) stretched on the embroidery frame 6. At the same time, output a setting signal to the load terminal,
The down counter 51 is preset with the control values for each of the X and Y axis components. As a result, the down cow
The counter 51 starts counting and subtracting clock pulses from the oscillator 52, and while the subtraction continues, the clock pulses are transmitted to both surf motors 20 via a pulse distributor 56, etc.
, 21 as a control signal, and through the operation of the embroidery frame support mechanism illustrated in FIG. 2, the embroidery frame 6 carried by the traveler 7 moves along the locus of a planar figure that is a composite of both components of orthogonal coordinates. In addition, in FIG. 4, assuming an example in which pulse motors used in an open loop control system are used as the types of both servo motors 20 and 21, a pulse distributor 56 for that purpose is used.
Although this example shows the use of circuit elements that can be used as servo motors, it is not limited to pulse motors, so when using other types of motors, the rotation angle can be controlled by feeding back the motor rotation amount. Appropriate circuit elements may be used to do so. After the control signals for the stitches are output in this manner, the control sequence increments the read address counter 43 and returns to the main routine to continue the sequence for the next stitch. In other words, the content of the control data for the next stitch is [86H] or [86H].
7H] and repeatedly executes control of the data output subroutine while it is negative. During the sequence execution of this subroutine, the end sensor 70
When the excitation of the cassette tape 33 ends, that is, when the end of reading one data block from the cassette tape 33 is detected, the drive output for the cassette tape drive zeta 47 is stopped. The number of stitches for one data block is up to 84 stitches as mentioned above, but the time required to read it is as follows.
This is expected to be completed within about 5 rotations of the upper shaft 36 of the sewing machine, and after the reading is completed, both servo motors 9. /2
Control within that data block of 0,21 is executed.
While the embroidery control is continuing, when the reading of the contents of one memory is completed, the main routine [86 FI
] In response to the detection, the process moves to the data reading subroutine shown in FIG. 9, and the data for the next data block is read anew into the memory on the side from which reading has been completed. In this case, the sewing machine 1 continues the embroidery frame control operation, and reads data from the cassette tape 33 by an interrupt as shown in FIG. 11 between the control operations. In this way, as the automatic control of embroidery sewing progresses, the reading operation of the cassette tape 33 continues intermittently, and during this time, the two memories 4
0 and 41 alternate between reading and reading roles, and the automatic control of one embroidery pattern proceeds without interruption of the sewing machine operation as a whole. Therefore, when the control data read content [87H] during the main routine is detected, the sewing machine is stopped at the position where the needle bar 2 is raised in response to a signal from the synchronization signal generator 37.Details are omitted from illustration and explanation. The sewing machine motor 48 is stopped by appropriate sewing machine motor stop control. As described in detail above, the present invention uses a magnetic tape as a large-capacity control data recording carrier for automatic embroidery control, and facilitates synchronization between the magnetic tape reading operation and the actual embroidery machine operation. Preferably, in the means for temporarily storing data read from a magnetic tape in a static memory within a control circuit, a computer that performs sequence control operations uses two relatively small-capacity memories as the static memory. In the configuration, there is provided discriminator means for switching the operation selection state of the two memories and storing the state like an index, so that the magnetic tape reading operation is performed intermittently. In addition, the two static memories mutually alternate the roles of reading and reading, so that the sewing machine movement as a whole is not interrupted, and each embroidery pattern is processed in a manner similar to online control. Since the automatic control of each embroidery frame progresses,
Complex embroidery patterns can be completed in a consistent continuous motion via magnetic tape without the need for particularly large amounts of static memory in the control circuitry, during which the operator can
No additional operations are required. Therefore, a sewing machine equipped with the means of the present invention is economically advantageous because it requires only a small built-in memory, and is easy to operate and is practical.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of an automatic embroidery sewing machine equipped with the device of the invention, Fig. 2 is an enlarged perspective view showing one mechanism part thereof, and Fig. 3 is a perspective view of an automatic embroidery sewing machine equipped with the device of the invention. FIG. 4 is a circuit diagram of the apparatus of the present invention, and FIGS. 5 and 6 are a mode of recording data on the magnetic tape used in the present invention. FIG. 7 is a timing chart illustrating the operation of a part of FIG. 4, and FIGS. 8 to 11 are flowcharts illustrating the control sequence. 1: sewing machine, 1a: console, 1b: sewing machine bed,
2: needle bar, 5: Y-axis guide rod, 6: embroidery frame, 7: traveler, 8, 9: carrier, 12: X-axis guide rod,
20: X-axis servo motor, 21: Y-axis servo motor, 2
2: X-axis drive cable, 27: Y-axis drive cable, 33: Cassette tape, 34: Data reader, 35: Start switch,
36: Main axis, 37: Synchronous signal generator, 38: Microcomputer, 39: Embroidery data memory circuit, 40: First memory, 41: Second memory, 42: Write address counter, 43: Read address counter, 44: Discriminator, 4
7: Cassette tape drive motor, 48: Sewing machine motor,
49: X-axis drive circuit, 50: Y-axis drive circuit, 51: Down counter, 57: Data input circuit, 67: Comparator, 6
8: Shift register, 70: (Monostable multivibrator) termination sensor.

Claims (1)

[Scope of Claims] 1. Cloth feed data for each stitch for embroidery sewing is read out from a storage means in which the data is stored, and two servo motors are activated for each stitch in synchronization with the operation of the sewing machine. In an automatic embroidery machine that drives an embroidery frame support mechanism through a control and controls the movement of the embroidery frame supported by the mechanism to follow the locus of a planar figure, a plurality of pieces of cloth feed data for each stitch are stored. One data block is made up of words and has a data amount of a predetermined number of stitches, and a no-signal zone is placed between each data block to record data blocks corresponding to the number of stitches required for each embroidery pattern. a data input circuit including a magnetic tape, a shift register for reading and storing data from the magnetic tape, and two memories each having a data storage capacity for one data block;
an embroidery data memory circuit comprising a discriminator that mutually switches the two memories to read and read roles and holds and stores their states; and an embroidery data memory circuit that reads data from one of the memories. Instructing a processing operation, and instructing the data input circuit to read the magnetic tape to read data from the shift register to the other memory, and determining when the content of the read data is the end of the one data block. switching the memory contents of the device and instructing the embroidery data memory circuit to read data from the other memory, and instructing the data input circuit to read the magnetic tape from the shift register to the one memory; A control device for an automatic embroidery sewing machine, comprising: a computer that reads data and drives and controls the servo motor according to the contents of the read data from the two memories. 2. The data input circuit includes an end sensor that detects the end of the one data block, and the computer
2. A control device for an automatic embroidery sewing machine according to claim 1, wherein reading of said magnetic tape is stopped in response to said detection signal.