JPH06126049A - Electronic cycle sewing machine - Google Patents

Abstract

PURPOSE:To enable the retrieval of an origin without trouble even when any interfering object exists in the course of an origin retrieving path. CONSTITUTION:In an electronic cycle sewing machine which the position of a needle 5 is moved relatively with respect to an X-Y coordinate set on a table 1 by moving the table in X and Y axes orthogonal to each other to perform an outline sewing by a moving operation, an X-axis origin sensor is provided to send a signal when the needle 5 reaches an origin in the X axis. A Y axis origin sensor is provided to send a signal when the needle 5 reaches the origin in the Y axis. an input means of data trains indicating the direction of moving the table corresponding to an origin retrieving path for positioning the needle 5 at the origin of the X-Y coordinate sequentially and an origin retrieving control means by which data are taken out sequentially from the data train so that the table is moved in the direction as indicated by the data at each thereof taken out separately to stop the movement of the table in response to signals of the X axis origin sensor and the Y axis origin sensor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention moves a table on which cloth is placed in the X-axis and Y-axis directions based on stitch data of a sewing pattern, thereby forming a pattern of arbitrary shape on the cloth. The present invention relates to an electronic cycle sewing machine, and more particularly to an electronic cycle sewing machine having a function of aligning the origin of a needle and a table as needed.

[0002]

2. Description of the Related Art In this type of electronic cycle sewing machine, the position of a needle is moved relative to XY coordinates set on a table by moving the table in the directions of X-axis and Y-axis which are orthogonal to each other. Pattern sewing of an arbitrary shape is performed based on the registered sewing pattern.

In this case, at the beginning of the sewing operation, the XY coordinates set on the table and the origin of the needle (hereinafter referred to as "origin search") are indispensable. The origin search is to position the needle at the origin (0, 0) of the coordinates by moving the table along the search path. Conventionally, the origin search is performed on the path uniquely determined by the sewing machine. Was there.

FIG. 11 shows each conventional origin search path when there is a needle position in each quadrant of XY coordinates (first quadrant to fourth quadrant). These search routes were set to the shortest route from the needle position.

[0005]

By the way, depending on the type of sewing pattern and the like, as shown in FIG.
The accessory device 3 may be added to the upper fabric retainer (not shown). Since this accessory device 3 exists in the relative movement region of the needle 5, when the needle 5 is attempted to move relatively along the origin search path, it may interfere with the needle 5.

[0006] If interference occurs, the origin search cannot be performed. In that case, it is troublesome to turn off the power once, move the cloth presser 2 to a position where it does not interfere, and then turn on the power again to perform the origin search. It was

Although a method of changing the origin search path so as not to interfere with it can be considered, conventionally, since the origin search path data is also incorporated in the drive control software of the sewing machine, the path is changed by changing the control software. Meaning that there was a problem that it was forced to change considerably.

According to the present invention, when there is an interfering object within the relative movement area of the needle, an origin can be searched while avoiding interference with the interfering object by setting a route avoiding the interfering object. The purpose is to provide.

[0009]

SUMMARY OF THE INVENTION The present invention, as shown in FIG. 1, shows the XY set on the table 1 by moving the table 1 in the directions of X-axis and Y-axis which are orthogonal to each other. In an electronic cycle sewing machine that moves the position of the needle 5 relative to the coordinates and performs shape sewing by the movement operation, the X-axis origin sensor that issues a signal when the needle 5 reaches the origin in the X-axis direction, and the needle 5 A Y-axis origin sensor that emits a signal when it reaches the origin in the Y-axis direction;
Data sequence input means for sequentially instructing the movement direction of the table corresponding to the origin search path for positioning the needle 5 at the origin (0, 0) of the coordinates, and data is sequentially retrieved from the data sequence and retrieved respectively. Origin search control means for moving the table in the direction indicated by the data for each data and stopping the movement of the table in response to the signals from the X-axis origin sensor and the Y-axis origin sensor. It is a solution to the problem.

[0010]

In the electronic cycle sewing machine of the present invention, when the needle may interfere with an interfering object when searching for the origin,
A search route that avoids interfering objects is set, and the order of the moving direction corresponding to the route is specified by a data string.

The moving direction is designated as, for example, the "+" direction of the X axis, the "-" direction, the "+" direction of the Y axis direction, the "-" direction, or the like. Then, the data is taken out in order from the data sequence that indicates the moving direction in order, and the table is X-
It moves in the Y plane and stops moving the table at the point where the X axis origin sensor or the Y axis origin sensor gives a signal. By repeating this for each fetched data, the needle is positioned at the origin.

Therefore, if the movement direction data is set in order, the origin search is automatically performed based on the signal from the origin sensor. In this case, the control software has the function of moving the table according to the data indicating the moving direction,
It suffices to realize a function of stopping the movement when a signal is output from the origin sensor during movement, and it can be defined completely separately from the data of the movement route. Further, since the data for designating the search route need only specify at least the moving direction, it is possible to easily set or change the search route corresponding to the interfering object.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a schematic block diagram of a table drive control system of the electronic cycle sewing machine of the embodiment.

In the electronic cycle sewing machine of this embodiment, the X-axis origin sensor 11, the Y-axis origin sensor 12, the X-axis + direction movement limit sensor 13, and the X-axis-direction movement limit are used as sensors in the drive control system of the table. A sensor 14, a Y-axis + direction movement limit sensor 15, and a Y-axis-direction movement limit sensor 16 are provided.

In the X-axis origin sensor 11, the needle is "+ X area".
An ON signal is emitted when the signal is in. The Y-axis origin sensor 12 emits an ON signal when the needle is in the "+ Y region". X axis + direction movement limit sensor 13, X axis − direction movement limit sensor 14, Y axis + direction movement limit sensor 1
5. The Y-axis-direction movement limit sensor 16 emits an ON signal when the movement limit is detected.

The signals of these sensors 11 to 16 are input to the arithmetic unit 20 via the input / output interface 22. The arithmetic unit 20 is connected to the memory 21 and
It reads the programs and data inside and writes it to memory as needed.

The arithmetic unit 20 performs arithmetic operations according to the program and executes the routines shown in FIGS. Then, if necessary, a drive signal is sent to the X-axis motor driver 31 and the Y-axis motor driver 32 via the input / output interface 22 to drive the X-axis motor 41 and the Y-axis motor 42,
The table is moved in the X-axis direction and the Y-axis direction.

Here, it is assumed that a data string for origin search according to the shape of the auxiliary device (interfering object) is registered in the memory 21 in advance.

When there are a plurality of types of accessory devices, a data string for origin search is registered for each type, and data for origin search corresponding to the corresponding accessory device is input by operating the keyboard or switch. You may make it select a column. Alternatively, the origin search data may be set at any time, and may be stored in an external storage device and transferred to an internal memory as necessary.

The XY coordinates as shown in FIG. 3 are virtually set on the table, and the first quadrant to the fourth quadrant are divided by the X axis and the Y axis.

The table driving data for origin search is set separately for each of the first to fourth quadrants recognized by the X-axis origin sensor 11 and the Y-axis origin sensor 12.

Here, the meaning of each data will be described.

"X0" is data for instructing "retrieval of origin of X axis". That is, this data corresponds to a command to move the table so that the needle moves in the direction of the origin of the X axis. Therefore, when the drive control of the table is performed according to the instruction of this data, when the needle is in the first quadrant or the fourth quadrant, the table is moved in the "-" direction of the X axis, and the needle is in the second quadrant or the third quadrant. The table is moved in the “+” direction of the X axis when the table is in.

"Y0" is data for instructing "Y axis origin search". That is, this data is data corresponding to a command to move the table so that the needle moves toward the origin of the Y axis. Therefore, when the drive control of the table is performed according to the instruction of this data, when the needle is in the first quadrant or the second quadrant, the table is moved in the "-" direction of the Y axis, and the needle is in the third quadrant or the fourth quadrant. The table is moved in the "+" direction of the Y-axis when the table is in.

"Xnnn" is data for instructing "move by nnn in X axis direction", and "Ynnn" is "n in Y axis direction".
This is data for instructing "move by nn". However, "nn
“N” is an integer value other than 0.

The data in the X-axis direction and the data in the Y-axis direction may be set individually or in combination. Note that each data is separated by ", (comma)".

As an example of specific data, "X
"100" means "move by 100 in the X direction".
Further, "Y-50" means "move by -50 in Y direction". “X0Y0” means “origin search is performed simultaneously for X-axis and Y-axis”. Furthermore, the data string “X100, Y0, X
"0" means to operate in the order of "move +100 in X direction", "Y axis origin search", and "X axis origin search".

Next, the contents of data when the auxiliary device (interfering object) 3 is added will be described.

As shown in FIG. 4A, the first quadrant and the fourth quadrant
When an interfering object 3 straddling the quadrant is attached, the origin search is performed on a route avoiding the interfering object 3 as indicated by the arrow in FIG. The data indicating the route for each quadrant is as follows.

(1) The data string when the needle is in the first quadrant or the fourth quadrant is "X0, Y0". This means that "origin search in the X-axis direction is performed first, and then origin search in the Y-axis direction is performed".

(2) The data string (single data in this case) when the needle is in the second quadrant or the third quadrant is "X0Y".
It is 0 ". This means that “origin search in X-axis direction and Y-axis direction is performed simultaneously”.

Further, in the case where an interfering object 3 extending over the first quadrant and the second quadrant as shown in FIG. 5A is attached, FIG.
The origin search is performed on a route avoiding the interfering object 3 as indicated by an arrow. The data indicating the route for each quadrant is as follows.

(1) The data string when the needle is in the first quadrant is "X100, Y0, X0". this means,
"First move +100 in the X-axis direction, then search the origin in the Y-axis direction, and then search the origin in the X-axis direction."

(2) The data string when the needle is in the second quadrant is "X-100, Y0, X0". this means,
"First move -100 in the X-axis direction, then perform origin search in the Y-axis direction, and then perform origin search in the X-axis direction."

(3) The data string when the needle is in the third quadrant or the fourth quadrant is "X0Y0". this means,
It is "simultaneously perform origin search in the X-axis direction and the Y-axis direction."

The route search data sequence for avoiding the interference when the interference is present is almost the same as the above, and such a data sequence is stored in the memory. Alternatively, the data string is set while watching the interfering object.

Next, the control operation of this embodiment will be described with reference to the flow charts of FIGS.

FIG. 6 is a main routine for origin search.
When this routine starts, steps 101-10
In 3, the state of the signal of the origin sensor is used to check in which quadrant the current needle position is. When the quadrant of the needle position is known, the setting data string of the corresponding quadrant is loaded in steps 104 to 107. Next, at step 108, the first data from the loaded data string up to the first ", (comma)" is read. For example, if the data string is "X100, Y0, X0", the first is "X10.
Only "0" is read.

Thereafter, step 109 to step 118
Then, control based on the read "1 data" is performed.

First, in step 109, it is determined whether or not the content of the data indicates "move in the X-axis direction". If YES, the X-axis movement processing routine of FIG. 7 is started in step 110, and then the process proceeds to step 111. N
If it is O, the process directly proceeds to step 111.

In step 111, it is determined whether or not the content of the data indicates "search for the origin in the X-axis direction". If YES, in step 112, the X-axis origin search processing routine of FIG. 8 is started, and then the process proceeds to step 113.
If NO, the process proceeds directly to step 113.

In step 113, it is determined whether the content of the data indicates "move in the Y-axis direction".
If YES, in step 114, the Y-axis movement processing routine of FIG. 9 is started, and then the process proceeds to step 115. If NO, the process proceeds directly to step 115.

In step 115, it is determined whether or not the content of the data indicates "search for the origin in the Y-axis direction". If YES, in step 116, the Y-axis origin search processing routine of FIG. 10 is started, and then the routine proceeds to step 117. If NO, the process proceeds directly to step 117.

At step 117, the completion of each process is waited. Next, in step 118, it is checked whether or not the origin search in the X-axis direction and the Y-axis direction is completed. If the origin search has not been completed, the process returns to step 108 and the same process as above is performed for the next "1 data".

Next, the X-axis movement processing routine (FIG. 7), X
The contents of the axis origin search processing routine (FIG. 8), the Y axis movement processing routine (FIG. 9), and the Y axis origin search routine (FIG. 10) will be individually described.

When the X-axis movement processing routine of FIG. 7 is started, in step 201, a movement instruction in the "+" direction or "-" is issued.
Check if it is a direction move instruction. In the case of the movement instruction in the "+" direction, the determination is YES, and the routine proceeds to step 202, where it is checked whether or not the + X movement limit sensor is ON. ON
If so, it means that “there is a movement limit”, so step 205
If it is OFF, proceed to step 203 and "+1"
Only move the table in the X-axis direction.

After the movement, it is checked in step 204 whether or not the movement amount is the set movement amount. If the movement is not completed, the process returns to step 202. If the movement is completed, the routine proceeds to step 205, where the end of the X-axis movement processing is notified. This notification is checked at step 117 in FIG.

On the other hand, if there is an instruction to move in the "-" direction, the determination in step 201 becomes NO and step 20
Proceed to step 6 and check whether the -X movement limit sensor is ON. If it is ON, it means that "it is in the movement limit", so the routine proceeds to step 205, and if it is OFF, the routine proceeds to step 207 and the table is moved by "-1" in the X-axis direction.

After the movement, it is checked in step 208 whether or not the movement amount is the set movement amount. If the movement is not completed, the process returns to step 206. If the movement is completed, the process proceeds to step 205 to notify the end of the X-axis activation.

When the X-axis origin search processing routine of FIG. 8 is started, it is checked in step 301 whether the X-axis origin sensor is ON. If it is OFF, the process proceeds to step 304. If it is ON, it means that the needle is in the "+ X area", so proceed to step 302 and only "-1" X
Move the table in the axial direction. Then step 303
The time when the X-axis origin sensor is turned off is monitored with, and the table is moved by “−1” toward the origin in the X-axis direction until it is turned off by the circulation of steps 302 and 303.

When the needle reaches the origin, the signal of the X-axis origin sensor switches from ON to OFF, the determination at step 303 becomes YES and the routine proceeds to step 304.

In step 304, on the contrary, the table is moved by "+1" in the X-axis direction. And step 3
At 05, the time when the X-axis origin sensor is turned on is monitored, and the table is moved toward the origin in the X-axis direction by "+1" until it is turned on by the circulation of steps 304 and 305.

When the needle crosses the origin, the signal of the X-axis origin sensor switches from OFF to ON, the determination in step 305 becomes YES, the process proceeds to step 306, the end of X-axis activation is notified, and in step 307. Notify the end of the X-axis origin search. These notifications are given in steps 117 and 1 in FIG.
Checked at 18.

The Y-axis movement processing routine of FIG. 9 and FIG.
The Y-axis origin search processing routine of 1 is the same as the above description except that "X" is replaced with "Y", and therefore the description thereof is omitted.

In the main routine of FIG. 6, when the activation of the X-axis and the Y-axis for one data is completed, the determination in step 117 becomes YES and step 118
Then, it is determined whether or not the X-axis and Y-axis origin search is completed. If not, then return to step 108 to retrieve and process the next data. When the origin search is completed, the determination in step 118 is YES and the entire origin search processing is completed.

The routine processing of FIG. 6 and the processing of FIG. 7 or 8
The routine process of 5 and the routine process of FIG. 9 or 10 are performed in parallel.

As described above, in the present control, at least one data is read from the data string designating the movement direction of the origin search, the table is moved each time the data is instructed, and the origin is reached. By the way, stop moving the table.

Therefore, if the data of the moving direction (including the moving amount in some cases) is sequentially determined and the data string is created, the origin search can be automatically performed based on the signal of the origin sensor. In this case, the control software is
Since it is only necessary to prepare the routines shown in the flowcharts of FIGS. 6 to 10, the origin search path corresponding to the interfering object can be set or changed without recreating the control software.

[0060]

As described above, according to the electronic cycle sewing machine of the present invention, even when there is an interfering object in the origin search path, the path can be easily reset or changed. Therefore, troublesome operation and change of control software are unnecessary.

[Brief description of drawings]

FIG. 1 is a block diagram showing the gist of the present invention.

FIG. 2 is a block diagram showing a main configuration of an embodiment of the present invention.

FIG. 3 is an explanatory diagram of quadrants and movement limits of XY coordinates in the same embodiment.

FIG. 4A is a plan view showing a state in which an auxiliary device (interfering object) is set on the cloth retainer in the same embodiment, and FIG. 4B is a plan view showing an origin search path when the auxiliary device is present.

FIG. 5A is a plan view showing a state in which another accessory (interfering object) is set on the cloth retainer in the same embodiment, and FIG.
Is a plan view showing the origin search path when the accessory device is present.

FIG. 6 is a flowchart showing a main routine for origin search in the embodiment.

FIG. 7 is a flowchart showing an X-axis movement processing routine started in the main routine.

FIG. 8 is a flowchart showing an X-axis origin search processing routine started in the same main routine.

FIG. 9 is a flowchart showing a Y-axis movement processing routine started in the main routine.

FIG. 10 is a flowchart showing a Y-axis origin search processing routine started in the main routine.

FIG. 11 is a plan view showing a conventional origin search path.

FIG. 12 is a plan view showing a state of interference with an interferer in a conventional origin search.

[Explanation of symbols]

 1 ... Table 3 ... Attached device (interfering object) 5 ... Needle 11 ... X-axis origin sensor 12 ... Y-axis origin sensor 41 ... X-axis motor 42 ... Y-axis motor

Claims (1)

[Claims] 1. An X-axis set on a table by moving the table in directions of an X axis and a Y axis which are orthogonal to each other.
In an electronic cycle sewing machine in which the needle position is moved relative to the Y coordinate and the shape sewing is performed by the movement operation, an X-axis origin sensor that issues a signal when the needle reaches the origin in the X-axis direction, and the needle is the Y-axis. Y-axis origin sensor that outputs a signal when the origin of the direction is reached, and data string input means for sequentially instructing the moving direction of the table corresponding to the origin search path for positioning the needle at the origin of the XY coordinates And sequentially fetching data from the data string, moving the table for each fetched data in the direction indicated by the data, and moving the table in response to the signals of the X-axis origin sensor and the Y-axis origin sensor. An electronic cycle sewing machine, comprising: an origin search control means for stopping.