JPS588871B2 - electronic sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic sewing machine in which a seam forming device performs pattern sewing in response to needle and fabric feed positioning signals.

Such a sewing machine has a seam forming device that can variably adjust the needle and cloth feed operations within a predetermined range, stores predetermined sewing pattern information, and uses this sewing pattern information to create a seam. It positions the needle and cloth feed of the forming device and causes the sewing machine to generate a predetermined sewing pattern.

The present invention is an electronic sewing machine equipped with a pattern width correction function that allows the pattern width to be partially changed within a preset pattern range, and particularly relates to the pattern width correction method.

This pattern width correction method creates a correction signal by making corrections to the basic pattern signal, and sequentially and alternately sends the basic pattern signal and its correction signal to the needle and cloth feed control unit to form a stitch. It is something that has been done.

Conventionally, in such electronic sewing machines, there have been machines in which the length of one stitch can be changed by mechanical or electrical means.

That is, the configuration was such that the length of one pitch of the criss-cross pattern shown in A in FIG. 1 was changed to form the crimp pattern shown in B in FIG.

If the pitch length is simply changed like this, the entire pattern will simply become larger.

The present invention is basically different from the above-mentioned conventional one, that is, it can form the patterns "B" and "G" shown in A or 2 of FIG. 2 as shown in B, C, or E. The width of the pattern can be partially changed within the range of the preset pattern.

For example, when you want to sew in initials, etc. using an alphabetic pattern as shown in Figure 2, B, B, etc. can be used rather than forming by a single stitch as shown in A or B.
As shown in C and E, it is better to form the pattern by adding thickness to it for ease of viewing and design.Also, even if the thread breaks in a part, the number of seams is concentrated and increases, so the letters may be cut off, or the thread may break. It is extremely effective in this case because it does not completely fall out.

The specific configuration of the present invention will be described below. FIG. 3 is a block circuit diagram showing the configuration.

In FIG. 3, the portion indicated by block A is the so-called mechanical section of the sewing machine including a needle position and cloth feed control section.

In this block A, the needle 1 is driven by a motor 2 which is a driving source.
It is connected to the main shaft 3 of the main shaft 3, that is, connected to the crankshaft portion 4 of the main shaft 3, and is given vertical reciprocating motion by the drive of the motor 2.

The needle 1 is also movable about a fulcrum C in the X-axis direction, and this is done by a linear motor 5 and a lever 6.

On the other hand, the fabric is fed by the feed dog 7 in the Y-axis direction relative to the X-axis direction of the needle 1. This is done by holding the fabric C on the feed dog 7 with the presser foot 8, and in this holding state, the entire fabric C is
It is designed to be moved in the axial direction.

The feed dog 7 is connected to a linear motor 9 and a lever 10.
operated by.

The linear mokes 5 and 9 described above are driven by amplifiers 11 and 12 provided correspondingly, respectively, and the amplifiers 11 and 12 are provided with parallel resistor groups R1 and R1, respectively, which correspond to each other.
R2 is connected.

Each of the parallel resistance groups R, R2 is composed of first to fourth resistors configured in the relationship of R, 2Ft, 4R, and 8R, where the resistance value of the first resistor is R, and the combined resistance of these resistors is The current flowing through Rl out changes accordingly.

That is, by appropriately selecting the first to fourth resistors according to the needle position signal introduced into the parallel resistor group R1, the current value flowing through Rout can be changed in 16 ways. If no current flows at all, Rout is "0", and if current flows through all of the first to fourth resistors, Bout becomes the minimum combined resistance and the current value becomes maximum.

As a result, the movement of the linear motor 5 is adjusted in 16 steps, and the hand 1 that is linked to this movement is moved 1 in the X-axis direction.
Adjustable in 6 levels.

Further, by appropriately selecting the first to fourth resistors based on the cloth feed signal introduced into the parallel resistance group R2, the feed dog 7 is adjusted in 16 steps in the Y-axis direction in the same manner as described above.

The parallel resistance groups R1 and R2 described above correspond to a D-A converter that converts digital code signals, which are needle position signals and cloth feed signals, from digital to analog. is the coordinate setting mechanism (needle position and fabric feed control unit) of the sewing machine that sets the stitch position.

Furthermore, a synchronizing signal α is outputted in conjunction with the rotation of the main shaft 3 of the motor 2 described above.

As shown in FIG.
3 is attached, and the rotary plate 13 is narrowed down to provide a projector 14 and a photoelectric converter 15.

As the main shaft 3 rotates in the direction of the arrow, the rotating plate 13 blocks the light from the projector 14 at a certain rotational position, and the light from the projector 14 is irradiated onto the photoelectric converter 15 at a certain rotational position.

The relationship between the rotation of the main shaft 3 and the synchronizing signal α is as shown in FIG. The rotating plate 13, the light projector 14, and the photoelectric converter 15 are set so that the synchronizing signal α is not output while the device is in position.

A switch 16 is provided in connection with the motor 2 described above,
This is closed when the motor 2, such as a foot switch, is driven to perform a sewing operation.

As described above, the configuration shown in block A is a so-called mechanical section of a sewing machine including a needle position and cloth feed control section.

Next, a part for storing pattern information regarding a plurality of pattern patterns, and a part for extracting this pattern information, form the above-described parallel resistance group R1,
The control part introduced into R,2 will be explained.

In FIG. 3, 20 is a storage device such as a read-only memory (ROM) that stores pattern information for one or more predetermined pattern patterns. Position information) Rx and Y coordinates (cloth position information) Ry are stored separately for each step.

The storage device 20 shown in the figure has only one pattern.

For example, regarding the pattern of the embodiment shown in FIG. 2A,
The X coordinate is divided into 16 and the Y coordinate is divided into 16, 16X1.
It has a matrix configuration of 6.

Therefore, the X and Y coordinates can be expressed by four pits of a binary code.

That is, regarding the pattern information of the alphabet "B" shown in FIG. 2A, the seam position coordinates of .

Next, the specific code to be stored as pattern information in the storage device 20 will differ somewhat depending on the coordinate setting mechanism of the sewing machine, but the coordinate setting mechanism shown by Toughlock A mentioned above is as follows. This is pattern information.

Regarding the case in Figure 2 A, if the stitch position of ■ is the first stitch and the stitch position of ■ is the second stitch, and the process proceeds sequentially through the first and second stitches, the Y coordinate of the first stitch is ``00''.
10'', the X coordinate is ``0010'', the Y coordinate of the second stitch is ``0011'', and the X coordinate is ``0010''.
”.

This is stored as an absolute value that directly represents the code corresponding to the coordinates of the seam position shown in FIG. 2A.

Specific pattern information regarding the pattern "B" in FIG. 2A is shown in FIG. 6A.

This stitch is composed of the 1st stitch to the 39th stitch, which are sequentially stored from the 1st address to the 39th address, and the sewing order is set as "".

As mentioned above, the reason why the pattern information showing the X and Y coordinates as absolute values is that the coordinate setting mechanism of the sewing machine
This is because the structure is such that the positioning of the cloth is set at the X coordinate position and the cloth is positioned at the Y coordinate position by moving the entire cloth.

The pattern information in the storage device 20 mentioned above is stored in the address counter 2.
1, they are accessed sequentially in address order.

That is, the address counter 21 is constituted by a 7-bit pure binary counter, and is counted up every time the signal SP arrives.

The output of the address counter 21 is decoded by the decoder 22 to become a signal corresponding to each address of the storage device 20, and the pattern information is sequentially accessed by this signal.

In this case, the address counter 21 is the counter c1 to C7.
It is a 7-bit pure binary counter, but the output of the counter C1 is input to the pulse generator Q1 and the pulse generator Q3 via the inverter 2, respectively, and the output of the counter C2 is
The output of ~C7 is introduced into the decoder 22.

Therefore, since this address counter 21 is configured to determine the address specification of the storage device 20 based on the states of the counters C2 to C7, it is possible to access addresses of up to 64 steps.

In addition, the address counter 21 described above is connected to the power switch 2
The OR gate C2 is reset by a one-shot pulse generated from the auto clear circuit 24 when the OR gate C2 is closed.
The count is counted up depending on the arrival of the signal SP which is the gate output of the gate.

In this case, the states of the counters C1 to C7 change sequentially as shown in the table below.

When this counter C1 is set from "0" to 1, a one-shot pulse signal is output from the pulse generator Q1, and the counter C1 is set to "1".
Pulse generator Q3 when reset from 1" to "0"
A one-shot pulse signal is output from.

The input side of the OR gate G2 from which the above-mentioned SP signal is derived is the β signal and pulse generation from the pulse generator Q2 which outputs the signal β (see FIG. 5) in response to the synchronization signal generated from the block A. Gate outputs from an AND gate G1 to which the output of the circuit Q1 is introduced are respectively introduced, and an SP signal is output in response to these β signals and the output of the AND gate G1.

On the other hand, for the pattern information in the storage device 20 accessed by the address counter 21, a signal related to the X coordinate Rx is introduced from the gate GX to the buffer register Sx, and a signal related to the Y coordinate is introduced from the gate GY to the buffer register BY.
has been introduced.

The gates Gx and Gy are connected to the pulse generator Q3 described above.
In other words, when the counter C1 of the address counter 21 changes from "1" to "0", the gate Gx is controlled by the pulse from the pulse generator Q.
, Gy are opened to transfer the pattern information from the storage device 20 to the buffer registers Bx and By.

Further, buffer registers Bx' and By each have a 4-bit capacity, and the buffer register Bx is connected to the parallel resistance group R1 on the block A side, and the buffer register By is connected to the parallel resistance group R2. It becomes connected to.

In the figure, the signal lines Lx and Ly connecting the buffer resistors Bx and By and the parallel resistance groups R1 and R2 are drawn as single lines for convenience, but in reality, four lines are connected in parallel to each other in the resistance group R.
, 1, and R2.

Next, a configuration of a modification portion for modifying the pattern width for the pattern information accessed from the storage device 20 will be described.

In FIG. 3, the switch 25 selects whether or not to modify the pattern width and selects whether or not to modify the pattern width. This movable contact 25A is an operating means for selecting the degree of the change, and is switched between fixed contacts o1, a2, o3, and o4.

This fixed contact 0 is connected to the other input side of the above-mentioned AND gate G1, and the movable contact 25A is connected when the pattern width is not modified.

In addition, the fixed contact 02 is connected to the AND gate G3, and the fixed contact 02 is connected to the AND gate G3.
3 is connected to the AND gate G4, and the fixed contact 04 is connected to the AND gate G5.

The outputs from the pulse generator Q1 described above are also introduced into the input sides of the AND gates 03 to G5, respectively, and the AND gate G3 receives a code signal of "0001", and the AND gate G4 receives a code signal of "0010". , and the AND gate G5 are each introduced with a code signal "0011".

Further, the outputs of AND gates G3 to G5 are respectively introduced to OR gate G6, and the output of AND gate G6 is input to adder 2.
6 has been introduced.

The adder 26 adds the contents of the buffer register Bx and the code signal from any one of the AND gates G3 to G, and inputs the output to the buffer register Bx again.

That is, for example, the movable contact 25A is the fixed contact 0.

When the counter C1 of the address counter 21 changes from "0" to "1", the AND gate G3 becomes conductive in response to the pulse from the pulse generator Q1, and the code signal "0001" becomes the OR gate. It is introduced into adder 26 via G6.

Then, the adder 26 adds "1" to the information on the X coordinate Rx side introduced into the buffer register Bx, and this result is again introduced into the buffer register Bx.

Therefore, modified pattern information in which "1" is added to the basic pattern information from the storage device 20 is introduced into the buffer register Bx, and this pattern information is sent to the parallel resistance group R1 on the block A side.

The above-mentioned adder 26 is shown in relation to the buffer register Bx, but this is because this is an example of a configuration that can be modified with respect to the X coordinate, as shown in Figure 2, C and H. When the Y coordinate is to be corrected, the adder and the means for selecting the degree of correction of the pattern width in relation to the buffer register By are constructed in the same manner as on the buffer register Bx side.

A series of operations in the block circuit diagram of FIG. 3 mentioned above will be explained below.

In use, when the operator closes the power switch 23, the address counter 21 is reset by a pulse from the auto clear circuit 24, and these counters C, ~C7 are
0000000".

It is assumed that the first address of the storage device 20 is specified when the counters C2 to C7 are "000000".

Therefore, the counter C1 of the address counter 21 is "0".
, the pulse generator Q3 outputs a pulse to make the gates GX and oy conductive, and the first gate of the storage device 20
The pattern information of the X coordinate Rx and the Y coordinate Ry of the address is introduced into buffer registers Bx and By, respectively, and this pattern information is sent to the parallel resistance groups Rl and R2.

When the switch 16 is closed to perform the sewing operation, the motor 2 is driven, the main shaft 3 is rotated, and the needle 1 starts to descend from the upper position.

In this case, the needle 1 is set to always be in the upper position when the sewing machine is stopped.

Before the needle 1 descends and penetrates the cloth C, the coordinate setting mechanism performs position setting based on the pattern information of the first address,
This needle 1 forms the first stitch at a position responsive to the pattern information.

That is, in the case of the pattern information shown in FIG. 6A, "0010" and "0010" are introduced into buffer registers Bx and By, and the coordinate setting mechanism linear motor 5 sets the needle 1 to "0010" in the X-axis direction. The linear motor 9 sets the feed dog 7 to a position where it responds to "0010", and stitch formation is performed in this state.

When the needle 1 finishes forming the first stitch and moves upward from the cloth C by the rotation of the main shaft 3, a synchronizing signal α is output as shown in FIG. 5, and a signal β from the pulse generator Q2 is output.
The SP signal is derived from the OR gate G2, and the address counter 21 is counted up in synchronization with the sewing operation of the needle 1.

Now, when the switch 25 is connected to the fixed contact 01 and the toss that was set when the pattern width is not corrected, the AND gate G is connected from this switch 25 to the fixed contact 0.
A switch output "1" (which sets the ground level to logic "1") is introduced to one of the terminals.

Then, the address counter 21 is incremented by 1 by the SP signal in response to the signal β, and the counters C1 to C7 become "1000000", and the "1" of the counter C1 causes a pulse signal to be derived from the pulse generator Q1. Introduced into AND gate G1.

Therefore, the AND gate G1 becomes conductive, the gate output is introduced into the OR gate G2, and the SP signal is applied to the address counter 21 again.

Then, the address counter 21 is further incremented by "1", and the counters C1 to C7 become "0100000".

As a result, the counters C2 to C7 are counted up by "1", and the second address of the storage device 20 is specified, and the pulse generator Q3 outputs a pulse signal due to "0" of the counter C1, and the gate Gx,
Gy becomes conductive, and the pattern information at the second address is introduced into buffer registers Bx and By, respectively.

Immediately, the second addresses "0010" and "0011" shown in FIG. 6A are introduced into the buffer registers Bx and By, and the coordinate setting mechanism sets the needle and cloth feed positions based on this pattern information. .

After this operation of the coordinate setting mechanism, the needle 1 descends to form a second stitch.

When this second stitch formation is completed, the synchronizing signal α causes the pulse generator Q2 to derive the β signal again, and the SP signal from the OR gate G2 causes the address counter 21
is further counted up by "1".

Thereafter, the address counter 21 sequentially counts up by the SP signal in response to the pulse from the pulse generator Q1 and the SP signal in response to the synchronization signal α. Stitch formation is performed by sequentially specifying addresses in the storage device 20.

In this case, since the SP signal is output by the pulse from the pulse generator Q1 while the β signal in response to the synchronization signal α is output, the needle 1 penetrates the cloth to form a certain stitch and the next The memory device 20 is used to form the stitches of
The addressing progresses by one, and new pattern information is given to the coordinate setting mechanism in response to the up and down movement of the hand 1.

As a result, the pattern shown in FIG. 2A is formed.

If the switch 25 is connected to the fixed contact 0 and the pattern width is to be formed at one pitch, that is, the pattern shown in FIG. 2B is set, the AND gate G3 is specified. becomes.

That is, the formation of the first stitch is performed in the same manner as described above,
Upon completion of forming the first stitch, the signal β output in response to the synchronization signal α causes the OR gate G2 to
A signal is output.

This SP signal sets the counters C1 to C7 of the address counter 21 to "1000000", and the pulse from the pulse generator Q1 is introduced into the AND gate G3 by "1" of the counter C1.

Then, the AND gate G3 becomes conductive and the OR gate G6 becomes conductive.
The code signal "0001" is introduced into the adder 26 via the adder 26, and the adder 26 inputs "0" into the pattern information "0010" at the
001'' and transfer this result again to the buffer resistor B.
Introduce into x.

Therefore, the buffer register By has pattern information "0010" at the Y coordinate of the first address, and the buffer register Bx has "0010".
0011'' and this pattern information is given to the coordinate setting mechanism.

In order for the needle 1 to descend after the operation of this coordinate setting mechanism, the second
Stitch formation is performed.

When this second stitch formation is completed, a synchronizing signal α is output, a β signal is derived from the pulse generator Q2, and in response, an SP signal is output.

Due to this SP signal, counters C1 to C7 of the address counter 21 become "0I00000", and counter C2 becomes "0I00000".
~C7 is counted up by 1 and storage device 2
A second address of 0 is specified.

Also, since the counter C1 becomes "0", the pulse generator Q3
A pulse is output from , gates Gx and Gy become conductive, and pattern information "0010" and "0011" at the second address are introduced into buffer registers Bx and By, respectively.

This pattern information is then given to the coordinate setting mechanism.

After this operation of the coordinate setting mechanism, the needle 1 is lowered and a third stitch is formed in response to the contents of the buffer registers Bx and By.

Furthermore, when this third stitch formation is completed, a synchronization signal α
is output and a β signal is derived from the pulse generator Q2,
In response to this, an SP signal is output.

Due to this SP signal, counters C1 to C7 of the address counter 21 become "1100000", and counter C2 becomes "1100000".
~C7 does not change, so addressing of storage device 20 does not proceed.

Then, when the counter C1 becomes "1", a pulse is output from the pulse generator Q1 again, and the AND gate G3 becomes conductive, and the content "0010" of the buffer register Bx is changed to "00".
01'' is added and the result is sent back to buffer register B.
introduced into x.

Therefore, the buffer register By has pattern information "0011" at the Y coordinate of the second address, and the buffer register Bx has "0011".
0011'' and this pattern information is given to the coordinate setting mechanism.

After this operation of the coordinate setting mechanism, the needle 1 is lowered and a fourth stitch is formed in response to the contents of the buffer registers Bx and By.

Thereafter, the above operation is repeated, that is, after forming a stitch with the basic pattern information from the storage device 20, a stitch is formed with the corrected pattern information in which "0001" is added to the pattern information of the X coordinate, and the basic pattern information is Stitch formation based on the modified pattern information and the modified pattern information are performed alternately.

As a result, the pattern shown at the beginning of Figure 2 can be created.

On the other hand, when the switch 25 is connected to the fixed contact Q3, the AND gate G4 is specified and the adder 26 creates modified pattern information in which "0010" is added to the basic pattern information in the buffer register Bx, and the correction pattern information for 2 pitches is created. A pattern shown in FIG. 2C having a width of .

Further, when the switch 25 is connected to the fixed contact 04, the AND gate G5 is designated and modified pattern information is created in which "0011" is added to the basic pattern information of the buffer register Bx.

The operation of the block circuit diagram in FIG. 3 is as described above, and the pattern information in the storage device 20 is as shown in FIG. 6A due to the coordinate setting mechanism.

Furthermore, as described above, if this coordinate setting mechanism is of a different type from that shown in FIG. 3, the specific pattern information stored in the storage device 20 will be different.

That is, as another method of the coordinate setting mechanism, the adjustment of the movement of the needle in the X-axis direction is the same as shown in Fig. 3, but the adjustment is made by the amount of change from the previous stitch position to the next stitch position with respect to the feed dog. The cloth is moved each time.

In other words, the method shown in Figure 3 moves the entire cloth from a base point set by coordinates to a position that responds to the coordinates while holding the cloth fixed, whereas the latter method uses the previous stitch position as the base point. In this case, only the amount of change up to the next stitch position is sent in the Y-axis direction.

The feed dog in this latter coordinate setting mechanism has a change value from "0000" to "1111" when Y coordinate pattern information is given by a 4-bit coat signal, for example, and the maximum backward feed amount is "0000'' and the maximum forward feed amount to ``llll'', and the intermediate value ``1''.
000'' is defined as no feeding, and this signal is given to the linear motor of the feeding teeth.

The specific code assignments are as shown in the table below.

Therefore, when this latter coordinate setting mechanism is provided,
The information regarding the coordinates is the same as that shown in FIG. 3, but for the information regarding the Y coordinate, it is necessary to store the relative amount, which is the amount of change from the previous stitch, by referring to the table above.

This specific pattern information is shown in FIG. 6B, which indicates the pattern pattern "B" shown in FIG. 2A, which is similar to FIG. 6A.

However, since the previous stitch does not exist at the Y coordinate of the first address in FIG. 6B, the Y coordinate of the first stitch is directly indicated as the reference position.

For the pattern information in Figure 6B, the opening in Figure 2,
As shown in C and E, the structure shown in FIG. 3 is of course the same even when the pattern width is modified.

As explained above, in the present invention, pattern information for performing pattern sewing by controlling the movement of the needle in the X-axis direction and the movement of the cloth feed in the Y-axis direction is stored in a binary code. The device includes a counter for sequentially addressing the pattern information in the storage device, and the pattern information sequentially retrieved from the storage device according to the operation of the counter is used as a positioning signal for the needle (X axis) and cloth feed (Y axis). and an electronic sewing machine that is introduced into a fabric feed control section and executes sewing operations according to pattern signals, comprising a storage means for temporarily storing pattern information sequentially retrieved from the storage device according to the counter. The pattern information is given to the needle and cloth feeding control section through the temporary storage means, and basic information regarding the needle position and/or basic information regarding cloth feeding is stored in the temporary storage means from the storage device. an operating means for giving a predetermined change value; and a modifying means for changing the basic pattern information based on the change value set by the operating means to create information regarding different needle positions and/or information regarding cloth feeding. is provided, and the basic pattern information retrieved from the storage device and the information regarding the needle position or cloth feed changed by the correction means are sequentially and alternately controlled to be sent as a positioning signal to correct the pattern width. With this method, the width of the basic pattern can be adjusted arbitrarily by operating the operating means during the sewing process, and apart from the basic pattern, a pattern with this pattern width can be modified. There is no need to store information in advance, so you can sew modified patterns just by storing the basic pattern in advance, and in particular, this width correction allows you to add thickness to the same pattern rather than a single sewing pattern. It is possible to provide an excellent electronic sewing machine which is preferable in terms of design of the sewing pattern, and even if the thread breaks in a part, the pattern does not easily collapse because the stitches are concentrated.

[Brief explanation of the drawing]

Figures 1A and B are comparison diagrams of seam formation using a conventional sewing machine with a normal pitch and seam formation when the length of one pitch is changed, and Figure 2 is a comparison diagram of normal pattern sewing formation and pattern width according to the present invention. Comparison diagram of different pattern sewing formations,
FIG. 3 is a block circuit diagram of the present invention, FIG. 4 is a configuration diagram of a synchronization signal α generation portion according to the present invention, and FIG. 5 is a diagram showing the relationship between hand movement and synchronization signals α and β signals according to the present invention. The time chart and FIGS. 6A and 6B are explanatory diagrams showing pattern information stored in the storage device. A: Mechanical section of the sewing machine including needle position and cloth feed control section, 1
: Needle, 2: Motor, 3: Main shaft, 5 and 9: Linear motor, 6 and 10: Lever, 7: Feed dog, 11 and 12: Amplifier, R1 and R2: Parallel resistance group, 16: For starting sewing operation switch, 20: storage device (ROM), 21: address counter, 22: decoder, 23: power switch,
24: Auto clear circuit, 25: Switch for selecting whether or not to modify the pattern width and the degree of modification, 26 Two-adder, Q1
, Q2 and Q3: pulse generator, G, , G3, G
4, G5: And gate, G2, G6: OR gate, Gx and Gy: Gate, Bx and By: Buffer register.

Claims (1)

[Scope of Claims] 1. A storage device that stores pattern information in binary code for controlling the movement of the needle in the X-axis direction and the movement of cloth feed in the Y-axis direction to perform pattern sewing, and the storage device. The device is equipped with a counter for sequentially addressing the pattern information of the device, and uses the pattern information sequentially retrieved from the storage device according to the operation of the counter as positioning signals for the needle (X-axis) and fabric feed (Y-axis) for the needle and fabric feed. In an electronic sewing machine that is installed in a control section and executes sewing operations in accordance with pattern signals, an address counter for retrieving pattern information from the storage device reads out the pattern information every other synchronization pulse synchronized with the sewing operation. temporary storage means for temporarily storing and holding the pattern information sequentially taken out from the storage device in accordance with the counter; and a temporary storage device provided between the storage device and the temporary storage device, the pattern information of the address counter. a control gate that is turned on in synchronization with the timing of taking out the cloth; and a control gate that is turned on in synchronization with the timing of taking out the cloth, and for giving a predetermined change value to the basic information regarding the needle position and/or the basic information regarding the cloth feeding stored in the temporary storage means from the storage device. an operating means, and a timing at which the change value information is retrieved from the storage device based on the setting of the change value by the operation means.
gate means for deriving the information in response to individual synchronization pulses; changing the basic pattern information based on change value information from the gate means to create information regarding different needle positions and/or information regarding cloth feeding; a correction means introduced into the temporary storage means, and the basic pattern information retrieved from the storage device and the information regarding the needle position or cloth feed changed by the correction means, introduced into the temporary storage means, are synchronized with the sewing operation. What is claimed is: 1. An electronic sewing machine characterized in that a positioning signal is sequentially and alternately sent to a needle and fabric feed control unit in response to a synchronization pulse generated by the sewing machine to correct a pattern width.