JPS6175866A - Stitch-back control at time of yarn cutting in multihead automatic embroidering machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) This technique is useful when thread breakage occurs in a multi-head automatic embroidery machine, when the thread is repaired and stitched back to continue embroidery. Stitch back t at the time of thread breakage in a multi-head automatic embroidery machine for sewing and stitching the bobbin thread pulled out onto the fabric of the head that does not break, IJ IE
Regarding the method.

(Prior art) Conventionally, in a multi-head automatic embroidery machine, if even one thread breaks, the thread breakage detection circuit detects the thread breakage, or in an embroidery machine without a thread breakage detection circuit, , the sewing machine spindle will automatically stop when the operator visually confirms that the thread has broken, or the sewing machine spindle will be stopped by pressing the stop switch, and the embroidery thread will be repaired. Stitch back the number of stitches, and the head where the thread breakage occurs will sew up to the position where the thread breakage was detected.The other heads will stop stitching and pause the stitching until the head where the thread breakage has occurred is completed, and then sew all the stitches. I was doing it.

(Problems to be Solved by the Invention) In the method for controlling stitchback when a thread breaks in a multi-head automatic embroidery machine as shown in the above-mentioned conventional technique, the needle movement is controlled during the process in which the thread breakage head sews to the thread breakage detection position. There is a problem in that the upper thread of each head that is at rest is pulled, and the lower thread of each head comes out above the fabric.

In the present invention, in the process of sewing the head where the thread breakage occurs to the thread breakage detection position, the bobbin thread protruding above the fabric of each head where the thread breakage has not occurred is sewn in. The above-mentioned problem is solved by performing all-round stitching from M stitches before the detection position.

(Means for Solving the Problems) The present invention provides a thread breakage detection means or After visually detecting or confirming the thread breakage and stopping the main spindle of the sewing machine, repair the embroidery thread and stitch back the embroidery frame on the head with the thread breakage for the number of stitches necessary to continue embroidering. , When sewing only the thread-broken head to the thread-break detection position, perform sewing to sew each lower thread pulled out onto each fabric of the head where the thread does not break. When a thread breaks in a multi-head automatic embroidery machine, the number M of embroidery stitches that can be arbitrarily set is set in advance, and all the stitches are embroidered from the number M of stitches counted from the thread breakage detection position. This stitchback control method is intended to solve the above problem.

(Function) When the multi-head automatic embroidery machine embroiders multiple heads according to the embroidery data, if one of the automatic embroidery heads breaks the embroidery thread, it will automatically or artificially stop the main shaft of the sewing machine and remove the thread breakage. After repairing the thread at the thread head that caused the thread breakage, stitch back the embroidery hoop for the number of stitches necessary to continue embroidering and restart the sewing machine spindle. The head part that does not cause thread breakage is used to sew in the threads that have been pulled out on top of the fabric during stitching back. According to the number of embroidery stitches M set in , stitching is started from the number M of stitches before the thread breakage detection position, and all the stitches are sewn including the head where the thread breakage occurred, thereby eliminating the thread breakage. The function is to sew each of the bobbin threads pulled out onto the fabric of the head that is not raised.

(Embodiment of the Invention) Next, the configuration of an embodiment of the present invention will be described with reference to FIG. Figure 1 shows the arithmetic control system of the embroidery machine.
111m, a storage element ROM containing basic data, a storage element RAM for storing calculation data, etc., and an auxiliary device for storing tape data into which embroidery design data, function data, etc. are input. Memory AME is connected.

Furthermore, as various interfaces, an operation panel interface 2 is connected to the operation panel 1 of the embroidery machine.
, an X-axis pulse motor 4 and a Y-axis pulse motor 5 that move the embroidery frame 3 in the directions of the X and 7 coordinate wheels, respectively.
A pulse motor interface 7 is connected to a pulse motor driver 6 for outputting drive pulse current to a pulse motor driver 6, and a tape reader interface 9 is connected to a tape reader 8 for reading a tape into which embroidery design data, function data, etc. are input. Sewing machine main shaft motor interface 11 connected to sewing machine main shaft motor 10. An angle sensor interface 13, which is connected to a 0-tally encoder 12 for outputting a signal corresponding to the position of the needle bar that moves up and down by the drive of the sewing machine main shaft motor 10, is connected to the microcomputer CPU.

Further, in order to obtain an embroidery width of more than the data, for example, 12.7 m+, the jump amplifier circuit 15 outputs a drive signal to the jump solenoid 14, which has a function of stopping only the sewing machine needle bar while the sewing machine is running, and the jump mode. A jump control circuit equipped with a stitchback single-head switch 16 for switching to stitchback jump or normal jump is equipped with a microcomputer C.
A jump interface 17 for relaying and outputting jump signals output from the PU is connected to the microcomputer CPU.

Further, a needle thread breakage detection interface 19 is provided for relaying the output signal of the needle thread breakage sensor 18 provided for each head to the microcomputer CPU.

The operation panel 1 includes a keyboard switch 1A for setting and inputting data, a start switch 1B for starting the main shaft of the sewing machine, a stop switch IC for stopping the main shaft of the sewing machine, and an embroidery frame 3. A stitch back switch ID for stitching back each needle, a tape read switch IE for starting reading by the tape reader 8, and a data set switch IF for setting data set by the keyboard switch 1A are attached.

Next, an overview of the operation of this embodiment will be explained.

When the operator of the embroidery machine presses the tape read switch 1E on the operation panel 1, the tape reader 8 reads X and Y data that determines the amount of movement of the coordinates of the embroidery frame 3 in the X-axis direction and Y-axis direction from the tape. Function data that determines the movement of the embroidery machine, such as the needle bar and sewing machine stop, is read and stored in the auxiliary memory AME. Next, by pressing the data set switch 1F on the operation panel 1, the microcomputer CPU is instructed to start setting the operation of the embroidery frame 3, and the color change to determine the embroidery color and the starting position of the embroidery frame 3 are determined. After performing manual operations for this purpose, embroidery is started by pressing the start switch 1B on the operation panel 1.

During embroidery operation, if the embroidery thread breaks or the bobbin thread is insufficient, it becomes necessary to replenish the embroidery.
The thread breakage detection signal output from the needle thread breakage sensor 18 is input to the microcomputer CPU via the needle thread breakage detection interface 19, so that the main shaft of the sewing machine is automatically stopped or the operator presses the stop switch 1.
Stop the main shaft of the sewing machine by pressing C.

After repairing the embroidery thread, press the stitchback switch 1D to return the embroidery frame 3 by the number of stitches necessary to continue embroidery, and then press the stitchback single head switch 16 for the head that requires embroidery repair. ONL/,
Start switch 1 on operation panel 1. Turn on B.

By pressing the stitch back switch 1D, the embroidery frame 3 is stitched back by the number of stitches necessary to continue embroidering, and if the embroidery is restarted and the stitches are sewn to the thread breakage detection position, no thread breakage has occurred. When the top thread is pulled, the bobbin thread comes out above the fabric, so the embroidery machine needs to sew in the bobbin thread that has been pulled above the fabric. To do this, the user performs a criss-cross stitch a number of times before the thread breakage detection position, which has been set in advance with the keyboard switch 1A, and performs a sewing stitch in which the bobbin thread that has protruded onto the fabric is sewn in.

That is, when the start switch 1B is turned on, the embroidery machine will embroidery the head for which the stitchback single head switch 16 is turned on up to a preset number of sewing embroidery stitches, counting from the thread breakage detection position, for example, 5. The embroidery jump is performed according to the normal data by the output signal from the stitchback jump line up to the point before the needle;
For the head for which the stitch back single head switch 16 is not turned ON, the sewing machine continues to jump by the jump ON signal of the normal jump line, stops the operation of the sewing machine needle bar, and starts sewing the stitch back from 5 stitches before the set number of embroidery stitches. By sewing, the bobbin thread protruding onto the fabric is sewn in to perform a sewing stitch, and thereafter, the head stitching is continued.

Next, the operation of this embodiment will be explained in detail according to the flowcharts 1 to 7 in FIG. 2.

The main flowchart of the embroidery machine is as shown in 1 in FIG. 2. When the power switch of the embroidery machine is turned on, the microcomputer CPU is initialized in step 101, and then, in the stop routine of step 102, After changing the color of the embroidery thread, positioning the embroidery start position, etc., press the operation switch 1A on the operation panel 1 to start the embroidery machine. In the operation routine of step 103, when the started embroidery machine is operated according to the embroidery data and thread breakage occurs, or when a color change code or end code, etc. Indicates return to stop routine.

Next, regarding the sewing machine spindle stop routine that is performed while the sewing machine spindle of the embroidery machine is stopped, see 2 and 2 in Figure 2.
This will be explained according to 3 in the figure. In step 201, the microcomputer CPU clears the working area of the memory element RAM while the sewing machine main shaft is stopped;
Perform stop processing that is not directly related to the present invention. Step 20
In step 2, the microcomputer CPU determines whether the tape reed switch 1E provided on the operation panel 1 is turned on, and if it is determined that it is turned on, it moves to step 203, while if it is not turned on. If it is determined that this is the case, the process moves to step 208, which will be described later. In step 203, the top address of the auxiliary memory AME is determined, and in step 204, the tape reader 8
1 stitch of X-axis movement data, Y-axis movement data, and
The function data is read and stored at the top address of the auxiliary memory AME in step 205, and then the address of the auxiliary memory AME is incremented by 1 in step 206.

Next, in step 207, it is determined whether the memorized function data is an end code, and if it is determined to be an end code, the process moves to step 208, while if it is determined that it is not an end code, step 204 is performed. Return to

In step 208, it is determined whether the data set switch 1F provided on the operation panel 1 has already been pressed, and if it is determined that it has not been pressed yet, the process moves to step 209, and if it has already been pressed. If it is determined that this is the case, the process moves to step 211, which will be described later. Step 2
In step 09, it is determined whether or not the data set switch 1F is turned on, and if it is determined that it is pressed, in step 210, a stitch counter that counts the number of stitches back and a counter that sets and counts the number of stitches ( Clear A). In step 211, it is determined whether or not the stitchback switch 1D provided on the operation panel 1 is turned on. If it is determined that it is turned on, the process proceeds to the next step 212 and the stitchback switch 1D is turned on.
If it is determined that the
The process advances to step 219, which will be described later.

In step 212, it is determined whether the flag F is set, indicating that stitchback is not in progress, and if it is determined that the flag F is set, the process moves to step 214 shown in 3 in FIG. 2 via ■. On the other hand, if it is determined that flag F is not set, the process moves to step 213. In step 213, after storing the stitch count value in the counter (A), the process moves to step 214 shown in 3 in FIG. If it is determined that the stitch counter is 0, the process proceeds to step 219, which will be described later. If it is determined that the stitch counter is not O, the process proceeds to step 215, where 7 lag F is set during stitchback, and in the next step 216. , 1 from the stitch counter value
pull. In step 217, the X data, Y data, and function data are read from the auxiliary memory AME, and in step 218, the step 217
In accordance with the X data, Y data, and function data read in step 1, a drive signal for driving frame 3 of 1i11 is output, and the process returns to step 211 via step 218 and step 2.

If it is determined in step 214 that the stitch counter is O, then in step 219 it is determined whether the "setting" switch in the keyboard switch 1A of the operation panel 1 is ON, and if it is determined that it is ON. teeth,
In step 220, while inputting a stitchback setting value, for example, 5, using the keyboard switch 1A, if it is determined that the "Pa setting" switch is not ON,
The embroidery step proceeds to step 223 after other stop processing. In step 221, if it is determined that the "set" switch in the keyboard switch 1A is turned on, the numerical value 5 entered in step 220 is
is registered in the auxiliary memory AMε in step 222, and then the process proceeds to step 223 after the embroidery machine and other components are stopped. In step 223, it is determined whether the start switch 1B of the operation panel 1 is turned on,
If it is determined that the switch is turned on, the process returns to the sewing machine main shaft operation routine, while if it is determined that the switch is not turned on, the process returns to step 202 via (2).

Next, the sewing machine main shaft operation routine will be explained with reference to the flowchart shown in 4 of FIG.

If it is determined in step 223 of the sewing machine spindle stop routine that the start switch 1st has been turned on, the process advances to step 301 of the sewing machine spindle operation routine, and the sewing machine spindle is stopped via the sewing machine spindle motor interface 11 in accordance with the output signal of the microcomputer CPU. Motor 10 is driven. In step 302, the working area of the storage element RAM is brought to an initial state, and the clock interrupt and origin interrupt of the rotary encoder 12 are set.

After step 302 is executed, the main shaft of the sewing machine starts operating, the hand movement starts, and the rotary encoder 12
A count signal from the rotary encoder 12 is input as an interrupt at an arbitrary timing according to an encoder clock interwoven subroutine described later, and an origin signal of the rotary encoder 12 is input as an interrupt at an arbitrary timing according to an encoder origin interwoven subroutine described later. Embroidery is performed by moving the needle and moving the embroidery frame 3.

The microcomputer CPU controls the pulse motor interface 7, according to the movement data X and Y of the embroidery frame 3.
It outputs a drive pulse signal to the X-axis pulse motor 4 and Y-axis pulse motor 5 via the pulse motor driver 6 to move the embroidery frame 3 and perform embroidery. For example, it also performs processing such as various displays.

In step 303, it is determined whether the stop completion flag of the sewing machine main shaft is set, and if it is determined that the stop completion flag is set, the routine returns to the sewing machine main shaft stop routine, while it is determined that the stop completion flag is not set. If so, the process moves to step 304, and it is determined whether or not thread breakage has occurred based on the output signal of the thread breakage sensor 18. If it is determined that thread breakage has not occurred, the process proceeds to step 305. , it is determined whether the stop switch 1C is turned on, and if it is determined that the stop switch 1C is not turned on, in step 306, the tape, the color change code as the -<E-ta function, or It is determined whether the end code has been read or not, and if it is determined that there is no color change code or end code, the embroidery needle continues to operate. On the other hand, if it is determined in the step 304 that thread breakage has occurred, if it is determined in the step 305 that the stop switch 1C is ON, it is determined in the step 306 that the color change code or the end code is present. If so, the process advances to step 307, where a sewing machine spindle stop request flag is set and a stop counter is set to 2.

Next, in step 308, the main shaft motor of the sewing machine is decelerated before stopping, and then the process returns to the step before operating the embroidery machine and other components.

Next, the encoder clock interwoven subroutine will be explained according to the flowchart shown at 5 in FIG. 2.

As shown in the sewing machine main shaft operation routine, the clock signal of the rotary encoder 12 is input as a needle bar position signal to the microcomputer CP0 via the angle sensor interface 13. In step 401, when one count signal of the rotary encoder 12 is input, the counter of the microcomputer CPU is incremented by one. In the next step 402, it is determined whether the counter value matches the timing of outputting the signal to the jump line. If it is determined that they match, in the next step 403, the stitch counter value is used to store the auxiliary memory AME. Specify the address and read the function data from the corresponding address. If it is determined in step 404 that the set value of the counter (A) is greater than the total value of the stitch count number and the set stitch back number, the process moves to step 405, while the set value of the counter (A) If it is determined that is small, the process moves to step 408. In step 405, it is determined whether the function data read in step 403 is jump data, and if it is determined to be jump data, in step 406, the stitchback jump line is ONL, embroidery is performed as normal data. perform a jump. On the other hand, the step 40
If it is determined in step 5 that the function data is not jump data, the process proceeds to step 407, where the normal jump line is turned on, the needle movement is stopped, and the sewing machine main shaft operation routine is returned.

In step 404, if the sum of the stitch count value and stitchback setting value is greater than the setting value of the counter (A), in step 408, the function data read in step 403 is set as jump data. If it is determined that the data is jump data, the process moves to step 409, whereas if it is determined that it is not jump data, the process moves to step 410.

In step 409, the normal jump line and the stitchback jump line are ONL and all types are sewn. In step 410, it is determined whether the stitch counter value and the value of the counter (A>) match. If it is determined that they match, in the next step 411, flag F indicating that stitchback is in progress is turned OFF, and the main shaft of the sewing machine is started. Return to the routine.Also, step 4
If it is determined in step 10 that the stitch counter value and the value of the counter (A) do not match, the process returns to the sewing machine main shaft operation routine.

If it is determined in step 402 that the value of the counter that counts the signal of the 0-tary encoder 12 does not match the timing of outputting the signal to the jump line, the process moves to step 412. In step 412, it is determined whether the value of the counter that counts the signal from the rotary encoder 12 matches the timing at which the embroidery hoop 3 is driven. If it is determined that the timing matches, the process moves to step 413. However, if it is determined that the timings do not match, the process proceeds to step 416 shown at 6 in FIG. 2 via step (3).

In step 413, X-axis data and Y-axis data for driving the embroidery frame 3 are read from the auxiliary memory AME according to the value of the stitch counter, and step 41
In step 4, a drive signal is output to the X-axis pulse motor and the Y-axis pulse motor according to the X-axis data and Y-axis data to move the embroidery frame 3, and in step 415, the stitch counter is incremented by +1, and then Return to the sewing machine spindle operation routine.

In step 416, it is determined whether the value of the counter that counts the signal from the mouth-tally encoder 12 matches the sewing machine main shaft stop timing, and if it is determined that they match, the process moves to step 417. on the other hand,
If it is determined that they do not match, other timing processing is performed and then the sewing machine main shaft operation routine is returned to execute the sewing machine main shaft stop routine.

In step 417, it is determined whether the sewing machine spindle stop request flag is set, and if it is determined that the sewing machine main spindle stop request flag is set, in step 418, 1 is subtracted from the value of the stop counter, and as a result, In step 419, the value of the stop counter is O.
If it is determined to be 0, the sewing machine main shaft motor 1 is
After applying the brake to 0 and setting the sewing machine main shaft stop completion flag, the sewing machine main shaft operation routine is returned to execute the sewing machine main shaft stop routine.

Next, the encoder origin signal interwoven subroutine when the rotary encoder 12 confirms the origin will be described with reference to the flowchart shown at 7 in FIG. this is,
When the 0-Tari encoder 12 confirms the origin, it sends the origin signal to the encoder counter of the microcomputer CPU through the angle sensor interface 13, thereby setting the value of the encoder counter to 0, as shown in step 601. It shows that.

In this way, by executing the sewing machine spindle operation routine that includes the initial routine, sewing machine spindle stop routine, encoder clock interwoven subroutine, and encoder origin signal interwoven subroutine, if the embroidery thread breaks, the thread breakage detection position By sewing all the pieces from a preset number of points earlier than the sewing machine, it is possible to make stitches without defects.

(Effects of the Invention) The present invention, when a thread breakage occurs in the embroidery thread in a multi-head embroidery machine, sews all threads from a preset number of meters before the thread breakage detection position, thereby removing the head where the thread breakage occurred. When stitching back when repairing the stitches,
This has the effect of sewing the pulled bobbin thread onto the fabric of each head that has not broken.

[Brief explanation of the drawing]

FIG. 1 is an arithmetic and control system diagram of an embroidery machine according to an embodiment of the present invention, and 1 to 7 in FIG. 2 are arithmetic and control flowcharts of an embodiment of the present invention. 1...Operation panel 2...Operation panel interface 3...Embroidery hoop 4...X-axis pulse motor 5...Y-axis pulse motor 6...Pulse motor driver 7...Pulse motor interface 8 ... Tape reader 9 ... Tape reader interface 10 ... Sewing machine main shaft motor 11 ... Sewing machine main shaft motor interface 12 ...
・Rotary encoder 13...Angle sensor interface 14...Jump solenoid 15...DiV pump amplifier circuit 16...Stitch back single head switch 17...Jump interface 18...One needle thread breakage sensor ...Needle thread breakage detection interface CPU...
Microcomputer RAM, ROM...Storage element 8 HE...Auxiliary memory 7 in Figure 9

Claims (1)

[Claims] In the process of the multi-head automatic embroidery machine reading embroidery data and embroidering according to the embroidery data,
If even one thread breaks, the thread breakage is detected or confirmed by the thread breakage detection means or visually, and the main shaft of the sewing machine is stopped, and then the necessary steps are taken to repair the stitching position and continue stitching. When the embroidery frame is stitched back by the number of stitches, only the head where the thread broke is sewn up to the thread breakage detection position, and each bobbin thread pulled out onto the fabric of each head where the thread does not break is sewn to the thread breakage detection position. In order to perform embroidery for stitching, an arbitrarily settable number M of embroidery stitches is set in advance, and the entire head is sewn from the number M of stitches counted from the thread breakage detection position. Stitchback control method when thread breaks in a multi-head automatic embroidery machine.