JPH06126050A - Electronic cycle sewing machine - Google Patents

Abstract

PURPOSE:To achieve a retainer correction without trouble even when an interfering object exists in the course of a retainer correction path. CONSTITUTION:In an electronic cycle sewing machine in which the position of a needle 5 is moved relatively with respect to an X-Y coordinate set on a cloth keeper 2 with the movement of a cloth keeper 2 in X and Y axes orthogonal to each other to perform an outline sewing by a moving operation, a movement limit sensor is provided to send signals when the needle 5 reaches each movement limit in X and Y axes and a means to set a data train having data indicating the direction of moving the cloth keeper arranged sequentially. A control processing means is provided and one data is taken out from the data trains to move the cloth keeper in the direction specified by the data taken out. Then, a processing operation is repeated in the order of the data of the data trains to stop the movement of the cloth keeper in response to a signal of the movement limit sensor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention moves a cloth retainer for holding a cloth to be sewn in the X-axis and Y-axis directions on the basis of stitch data of a sewing pattern, whereby an arbitrary shape is sewn on the cloth. Related to electronic cycle sewing machines that form patterns, especially power source O
The present invention relates to an electronic cycle sewing machine having a function of performing initial correction of each bearing of the X-axis and the Y-axis by moving the cloth presser to the upper, lower, left and right movement limits when the first origin of N is searched.

[0002]

2. Description of the Related Art In an electronic cycle sewing machine, an XY support table to which a cloth retainer is fixed is moved in the X-axis and Y-axis directions so that the needle position is relative to the XY coordinates set on the cloth retainer. The sewing machine is moved to perform pattern sewing of an arbitrary shape based on the registered sewing pattern.

Generally, a linear rolling bearing is used as a means for slidably supporting the support base in the X-axis and Y-axis directions.

FIG. 11 shows an example of a structure in which a moving race for the X axis and a moving race for the Y axis are slidably supported by using a linear rolling bearing. 51 is a Y-axis fixed race, 52 is a Y-axis moving race, 53 is a Y-axis ball retainer, 5
4 is a stopper for both ends of the Y-axis, 55 is a fixed race for the X-axis, 56
Is an X-axis moving race, 57 is an X-axis ball cage (retainer), and 58 is a stopper on both ends of the X-axis.

In such a linear roller bearing, as shown in FIG.
As shown in FIG. 2, when the moving races 52, 56 move in the order of (a), (b), (c) with respect to the fixed races 51, 55, the ball cages 53, 57 also move.

By the way, when it is used for a long time, a phenomenon occurs in which the position of the ball cage is displaced. For this reason, the ball retainer cannot be held in the proper state by the fixed race and the moving race, and the ball at the position indicated by the arrow P in FIG. 13 may fall off from the ball retainers 53 and 57.

In order to prevent this, at the time of the first origin search when the power is turned on, the ball holder is moved to the movement limit of the X axis and the Y axis so as to hit the stopper as shown in FIGS. The displacement of the cage is corrected. This is called retainer correction.

As shown in FIGS. 14 and 15, the retainer correction is actually performed by moving the X-axis and the Y-axis to the movement limits of "+" and "-". The retainer was corrected through a uniquely determined route.

[0009]

By the way, an accessory device may be added to the cloth retainer depending on the type of the sewing pattern and the like. Since this auxiliary device exists in the relative movement area of the needle, when the needle is relatively moved along the retainer correction path, it may interfere with the needle.

If there is interference, the retainer cannot be corrected, so
In that case, it was troublesome that the power was once turned off, the cloth presser was moved to a position where it did not interfere, and then the power was turned on again to perform retainer correction.

A method of changing the retainer correction path so as not to interfere may be considered, but since the data of the retainer correction path has been incorporated into the sewing machine drive control software in the past, the path change is made 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 in the relative movement area of the needle, the retainer correction can be performed while avoiding the interference with the interfering object by setting the route avoiding the interfering object. The purpose is to provide.

[0013]

According to the present invention, as shown in FIG. 1, the X-axis set on the cloth presser 2 is moved by moving the cloth presser 2 in the X-axis and Y-axis directions orthogonal to each other. -In an electronic cycle sewing machine that relatively moves the position of the needle 5 with respect to the Y coordinate and performs shape sewing on the material to be sewn held by the cloth presser 2, the needle 5 moves in the + direction of the X axis. X that emits a signal when the limit is reached
An axis + direction movement limit sensor, an X-axis-direction movement limit sensor that outputs a signal when the needle 5 reaches the − direction movement limit of the X axis, and the needle 5 reaches the + direction movement limit of the Y axis. A Y-axis + direction movement limit sensor that issues a signal, a Y-axis-direction movement limit sensor that issues a signal when the needle 5 reaches the Y-axis movement limit, and the movement direction of the cloth presser 2 is designated. Means for setting a data string in which the data to be arranged are arranged in order, and one data is taken out from the data string, the cloth presser 2 is moved in the direction specified by the taken out data, and the cloth is pressed in response to the signal from the movement limit sensor. The above problem is solved by providing control processing means for repeatedly performing the processing operation for stopping the movement of the presser 2 in accordance with the order of the data in the data string.

[0014]

In the electronic cycle sewing machine of the present invention, when the needle may interfere with the interfering object during the retainer correction, the retainer correction path for avoiding the interfering object is set, and the order of the moving direction corresponding to the path is set as the data string. Specify by.

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-
Move on the Y plane, and move the cloth retainer at the point where the X axis + direction movement limit sensor, the X axis − direction movement limit sensor, the Y axis + direction movement limit sensor, and the Y axis − direction movement limit sensor give a signal. Stop and move to processing operation in the next direction. Retainer correction is performed by repeating this for each piece of data taken out.

Therefore, if the moving direction data is set in order, the retainer correction is automatically performed based on the signal from the moving limit sensor. In this case, the control software is
It is sufficient to realize the function to retrieve the data in order, the function to move the table according to the data indicating the movement direction, and the function to stop the movement when a signal is output from the movement limit sensor during movement. Can be defined entirely differently from. Further, since the data for instructing the retainer correction path need only specify at least the moving direction, it is possible to easily set or change the retainer correction path corresponding to the interfering object.

[0017]

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 (support table including cloth retainer) 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, 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 from 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 calculation unit 20 performs calculation 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 the memory 21 is preliminarily registered with the memory 21 as a data string relating to the retainer correction and origin search paths according to the shape of the auxiliary device (interfering object). The retainer correction is performed in conjunction with the origin search when the power is turned on. In this embodiment, the data string registration for routing is performed so that the retainer correction and the origin search are performed together.

When there are a plurality of types of auxiliary devices, a data string is registered for each type, and the data string corresponding to the corresponding auxiliary device can be selected by an input operation with a keyboard or a switch. Good. Alternatively, the data string may be set at any time, for example, 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.

A table driving data string for retainer correction 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 "retrieval of Y-axis origin". 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 the X-axis direction", and "Ynnn" is "n-n in the 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" and "Y
"-50" means "move by -50 in Y direction", and "X"
"-9999" means "move to the X-axis movement limit in the-direction" by specifying a value that is greater than the X-direction movement range, and "Y9999" indicates that the Y-axis movement range is +. By specifying a large value, it means "move to the + direction movement limit of the Y axis". Further, "X0Y0" means "perform origin search simultaneously on the X and Y axes". Furthermore, the data string “X9999, Y0, X0” is “moved to the + direction movement limit of the X-axis”, “Y-axis origin search”,
It means to operate in the order of "origin search on X axis".

Next, the contents of the data when the auxiliary device (interfering object) 3 is added as shown in FIG. 4 or 5 will be described.

When the interfering object 3 as shown in FIG. 4 is attached, the retainer correction and the origin search are performed on the path avoiding the interfering object 3 as shown by the arrow.

In this case, the data strings designating the route for each quadrant are all the same, that is, "X-9999, Y9999,
Y-9999, X9999, X0, Y0 ". The meaning of this is, "First, move to the minus direction movement limit of the X axis,
Next, move to the + direction movement limit of the Y axis, then move to the − direction movement limit of the Y axis, then move to the + direction movement limit of the X axis, then perform origin search in the X axis direction, Then, the origin search in the Y-axis direction is performed. "

Further, when the interfering object 3 as shown in FIG. 5 is attached, the retainer correction and the origin search are performed on the route avoiding the interfering object 3 as shown by the arrow. The data string designating the route for each quadrant is as follows.

(1) When the needle is in the first quadrant or the fourth quadrant, the data string is "X9999, Y9999, Y-999.
9, X-9999, X0Y0 ". this means,
“First move to the + direction movement limit of the X axis, then move to the + direction movement limit of the Y axis, then move to the − direction movement limit of the Y axis, and then to the − direction movement limit of the X axis. Then, the origin is searched for in the X-axis direction and the Y-axis direction at the same time. "

(2) The data string when the needle is in the second quadrant or the third quadrant is "X-9999, Y9999, Y-99.
99, X9999, X0Y0 ". this means,
“First, move to the X axis − direction movement limit, then move to the Y axis + direction movement limit, then move to the Y axis − direction movement limit, and then to the X axis + direction movement limit. Then, the origin is searched for in the X-axis direction and the Y-axis direction at the same time. "

The data sequence of the retainer correction and origin search routing for avoiding the interference when the interference is present is almost the same as 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 retainer correction and origin search. When this routine starts, in steps 101 to 103, the quadrant in which the current needle position is located is checked by the state of the signal from the origin sensor. When the quadrant of the needle position is known, the setting data string of the corresponding quadrant is loaded in steps 104 to 107. Then
In step 108, one data up to the first ", (comma)" is read from the loaded data string. For example, if the data string is "X9999, Y9999, Y-999.
9, X-9999, X0Y0 ", the first is" X9
Only "999" 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 the content of the data is an instruction for "origin search 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 or not 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 "retrieval of origin in 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 the movement 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 goes beyond the origin, the signal of the X-axis origin sensor is switched from OFF to ON, the determination in step 305 becomes YES and the process proceeds to step 306 to notify the end of the X-axis activation, 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 out from the data sequence that specifies at least the moving direction of the retainer correction and the origin search, and each time the table is moved and moved according to the contents instructed by the data. The movement of the table is stopped in response to signals from the limit sensor and the origin sensor, and this is repeated for each data.

Therefore, if the data of the moving direction (including the moving amount in some cases) is determined in order to create the data string, the retainer correction and the origin search are automatically performed based on the signals of the movement limit sensor and the origin sensor. It can be performed.
In this case, as the control software, it is only necessary to prepare the routines shown in the flowcharts of FIGS. 6 to 10. Therefore, setting or changing of the retainer correction path and the origin search path corresponding to the interfering object can be performed without recreating the control software. You can do it.

It should be noted that in the first origin search after the power is turned on, the origin search path in which the retainer correction as described above is added is set as data, and only the origin search path can be set as data after the second time. It is possible to make an efficient sewing machine.

[0063]

As described above, according to the electronic cycle sewing machine of the present invention, even if there is an obstacle in the retainer correction 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. 4 is a plan view showing retainer correction and origin search paths when an auxiliary device (interfering object) is set on the cloth retainer in the same embodiment.

FIG. 5 is a plan view showing retainer correction and origin search paths when another accessory (interfering object) is set on the cloth retainer in the same embodiment.

FIG. 6 is a flowchart showing a main routine of retainer correction and 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 perspective view showing details of a linear rolling bearing used in a support structure of a support base of a general sewing machine.

FIG. 12 is a diagram showing an outline of operation of a linear rolling bearing.

FIG. 13 is an explanatory diagram of a problem when a linear rolling bearing is used.

FIG. 14 is a plan view showing an example of a conventional retainer correction path.

FIG. 15 is a plan view showing another example of a conventional retainer correction path.

[Explanation of symbols]

 1 ... Cloth retainer 3 ... Attached device (interfering object) 5 ... Needle 13 ... X axis + direction movement limit sensor 14 ... X axis-direction movement limit sensor 15 ... Y axis + direction movement limit sensor 16 ... Y axis-direction movement limit sensor Sensor 41 ... X-axis motor 42 ... Y-axis motor

Claims (1)

[Claims] 1. An X-axis set on the cloth retainer by moving the cloth retainer in the X-axis and Y-axis directions orthogonal to each other.
In an electronic cycle sewing machine that relatively moves the position of the needle with respect to the Y coordinate and performs shape sewing on the cloth to be sewn held by the cloth presser, the needle has reached the movement limit in the + direction of the X axis. An X-axis + direction movement limit sensor that issues a signal, an X-axis-direction movement limit sensor that issues a signal when the needle reaches a movement limit in the − direction of the X axis, and the needle moves in the + direction of the Y axis. When the limit is reached, a Y-axis + direction movement limit sensor, a Y-axis-direction movement limit sensor that issues a signal when the needle reaches the Y-axis movement limit, and the movement direction of the cloth presser A means for setting a data string in which designated data are arranged in order, one data is taken out from the data string, the cloth retainer is moved in a direction designated by the taken data, and the cloth is responsive to a signal from the movement limit sensor. Stop moving the presser The processing operation, the electronic cycle sewing machine, characterized in that and a control processing means for performing repeated in order of data of the data string.