JPH0523455A - Controller of data selecting means of sewing machine - Google Patents

Abstract

PURPOSE:To prevent the deterioration or the worn efficiency by constituting the controller so that in the case plural switches are turned on when a power source is turned on, it is stored as a fault, that of the top priority is read out and set as sewing data, and in the case the switch which is turned on after the power source is turned on is not stored, it is set instead of the most priority switch. CONSTITUTION:For instance, when switches SW2, SW5 are turned on when a power source is turned on, both the switches SW2, SW5 are stored as fault switches. Also, pattern data corresponding to the switch SW2 is stored by priority, and a sewing machine is driven by this pattern data by an actuating signal. Moreover, even if a selection button 10 of the SW5 is pushed after this sewing is completed, since it is the fault switch, a pattern is not written. Subsequently, when the switch SW5 is reset to turn-off in the course of driving the sewing machine, write as the fault switch is eliminated. Accordingly, when the selection button 10 corresponding to the switch SW5 is pushed, the corresponding pattern data is written, and the sewing machine is driven by its pattern data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine which stores a plurality of different sewing data in a storage unit in advance and controls a sewing machine mechanism based on the data selected and read from the storage unit by operating an operation switch, The present invention relates to a control device of data selecting means of a sewing machine, which performs processing when the operation switch is turned on due to a failure when the power is turned on.

[0002]

2. Description of the Related Art Conventionally, for example, data corresponding to a plurality of different stitch patterns are stored in advance, and in order to select a desired data from the plurality of data, an operation switch corresponding to each data is individually operated. Is provided, and the corresponding data is read from the storage section in relation to the signal generated by the ON operation of this switch.

[0003]

When a plurality of switches among these switches are turned on when the power is turned on due to a failure such as a short circuit, a plurality of data are selected at the same time and processing becomes impossible, and the sewing machine becomes unusable. As a result, the work efficiency is lowered, and malfunctions occur in the circuit and the like, which causes the failure of the circuit and the machine and shortens the life of the device. The present invention aims to eliminate the above-mentioned conventional drawbacks.

[0004]

[Means for Solving the Problems] First determination means for determining the on or off state of each switch when power is turned on, and second storage for performing a switch determined to be in the on state by the first determination means. Means, a second judging means for judging the priority of the switches when there are a plurality of switches judged to be in the ON state by the first judging means, and a switch of high priority by the second judging means. The first operating means for operating the reading means so as to read the sewing data corresponding to the second sewing means and the second operating means related to the switch stored in the second storing means after the power is turned on are switched from the on state to the off state. Delete means for deleting the memory of the switch from the storage means, and the second storage means related to the switch switching from the off state to the on state after the power is turned on. If a switch other than the switch and the switch stored in the second storage means by the above-mentioned determination, the sewing data corresponding to the switch is read in place of the sewing data corresponding to the priority switch. This is achieved by the second action means acting on the reading means.

[0005]

When a plurality of switches are turned on when the power is turned on, those switches are stored as faulty switches, and the sewing data corresponding to the highest priority of those switches is read out and set, and the power is turned on. When the switch is switched from the off state to the on state later, it is determined whether or not the switch is stored, and if it is not stored, it is read out and set instead of the sewing data of the highest priority, and the failure switch is turned on after the power is turned on. When is turned off, the memory is deleted.

[0006]

Embodiments will be described with reference to the drawings. Table 1
The sewing machine 2 mounted on the top of the sewing machine 2 connects a pulley 3 fixed to a main shaft (not shown) and a drive pulley 5 of a motor 4 below the table 1 with a belt 6, and the motor 4 is a known electromagnetic clutch motor. It is driven or stopped at a variable speed by electrical control. The needle position detection means 7 arranged between the main shaft and the machine frame of the sewing machine detects the rotation angle of the main shaft corresponding to the vertical position of the needle separately and generates an upper position signal and a lower position signal. On the front end surface of the control body 8 fixed to the upper part of the sewing machine 1, a display portion 9 displayed by a pattern corresponding to each sewing pattern, for example, five kinds of patterns, and a corresponding press pattern corresponding to each pattern are arranged. The selection button 10 and the light emitting portion 11 arranged corresponding to each pattern so as to light up when the selection button 10 is selected are provided.

Next, the electric circuit will be described. SW1
Each of SW5 to SW5 is a switch corresponding to each selection switch 10 and is closed by a pressing operation of a corresponding button 10 to generate a selection signal.
The priorities are set in order from. 12 is pedal 1
6 is a switch means for generating a signal in connection with the operation of each manual operation member such as 6 (FIG. 1), and 13 is an initial reset circuit for setting the microcomputer MC to the initial state when the power is turned on.

The microcomputer MC has a ROM (first storage means), a RAM (second storage means) and a CPU (constituting a reading means) inside, and the ROM has a speed command corresponding to the sewing pattern and the number of stitches. , Data of patterns A to E such as automatic stop are stored for each address, and SW1 to SW
The data of the corresponding pattern is read by matrix control of the selection signal from No. 5, and the program relating to the failure control of the pattern selection shown in the flowchart of FIG. 3 is stored. Reference numeral 14 is an operating means having a plurality of solenoids respectively connected to the sewing machine operating portion such as reverse stitching and thread trimming, and 15 is a speed setting circuit for controlling each electromagnet of the clutch and brake of the motor 4 to control the motor speed. The operating means 14 and the speed setting circuit 15 are controlled based on the data of each pattern of the microcomputer MC.

In the flowchart of FIG. 3, the microcomputer MC is initially reset (step-1) by a signal from the initial reset circuit 13 when the power is turned on,
At this time, it is determined whether any of the switches SW1 to SW5 of the selection buttons 10 is turned on (step-
2, the first determining means), when all the switches SW are off, the data of the pattern A corresponding to the switch SW1 is read from the ROM and written in the RAM (step).
-16).

When any of the switches SW is turned on, the switch SW in the on state is written as a failed switch in the RAM (second storage means) (step-
3), it is judged whether the faulty switch SW is plural or singular (step-4), and when it is singular, the data of the pattern corresponding to the switch SW is read from the ROM and RA
Write to M (step-17). When there are a plurality of switches, the priorities of the switches SW are determined (step-5, second determination means), the pattern data of the highest priority switch SW is read from the ROM and written in the RAM (s
ter-6, second action means).

Then, it is judged whether a start signal is generated (s
When it occurs, the "pattern sewing routine" is operated to perform the sewing control based on the pattern data written in the RAM (step-8). Then R
It is judged whether or not the faulty switch SW is written in AM (second storage means) (step-9). When the faulty switch SW is written, it is determined that the fault has been fixed, that is, the switch SW written in the RAM as the faulty switch SW. It is determined whether or not any switch has been turned off (step-10), and if there is, the switch SW is deleted from the RAM (step).
-11). This step-9 to step-11 constitutes a deleting means.

Next, it is judged whether any one of SW1 to SW5 is turned on and a selection signal is generated (step-12, step-12).
Whether it is a readable time, that is, when it is prohibited to change the pattern between the time when the start signal is generated and the thread trimming operation after the completion of the pattern sewing is prohibited. If it is readable, it is judged whether the switch SW that has generated the selection signal is written in the RAM (second storage means) as a failure switch (step-14). If not, write the pattern data corresponding to the switch SW from the ROM to the RAM (step-1).
5). This step-14,15 is used as the second action means.

The present invention is configured as described above, and the operation will be described below. Switches SW2 and SW when power is turned on
Assuming that 5 and 5 are turned on, this SW2, S
W5 and W5 are written in the RAM as a failure switch, and since there are a plurality of switches, the data of the pattern B corresponding to SW2 is written and stored in the RAM according to the priority order. When a start signal is generated by operating the pedal 16, the sewing machine is driven so as to form a stitch based on the data of the pattern B.
Even if the selection button 10 corresponding to SW2 is pressed while the sewing machine is being driven, it is not the time to read, so the sewing control of pattern B is continued, and when the selection button 10 corresponding to SW5 is pressed again after thread trimming is completed, SW5 The pattern E is not written in the RAM because it is written in the RAM as a failure switch.

When SW5 returns to the OFF state while the sewing machine is being driven or stopped, the writing to the RAM as the failure switch is deleted. Then SW5 again
When the selection button 10 corresponding to is pressed, the data of the pattern E is written in the RAM, and the sewing machine is driven so as to form the sewing based on the data of the pattern E when the start signal is generated. Next, select button 1 corresponding to SW2 again
If you press 0, SW2 still remains as a failure switch, so you can select "Judge" (step-1) in the flowchart.
According to 4), the pattern data is invalid because it is not written to the RAM, and subsequently the pattern E corresponding to SW5 is generated.
The sewing machine is driven based on the data of.

When the power is turned on while the selection button 10 corresponding to SW3 is pressed, SW3 is in the ON state, so that SW3 is written in the RAM as a failure switch, and the data of the pattern C is written in the RAM and activated. When a signal is generated, the sewing machine is driven based on the pattern C data. If the operation of the select button 10 is temporary, SW3 is immediately turned off, and then SW3 is deleted from the RAM as the failure switch and the next selection becomes effective.

In this embodiment, the pattern A corresponding to SW1 is stored in the RAM when the switches SW1 to SW5 corresponding to the selection button 10 are all off when the power is turned on.
, But the other switches SW2 to SW
The pattern corresponding to No. 5 may be written, or the pattern corresponding to any of the switches SW1 to SW5 may not be written.

In this embodiment, the data read from the ROM or the failure switch of the switches SW1 to SW5 corresponding to the selection button 10 is stored in the RAM, but other storage such as a register is used instead of the RAM. Means may be used. In this embodiment, the sewing data stored in the ROM is used to control the speed command, the number of stitches, etc., but the needle swing position, the cloth feed, etc. are controlled by the displacement of the operating mechanism such as the stepping motor and the servo motor. The sewing machine may store the data for controlling the displacement amount of the operating mechanism.

[0018]

As described above, according to the present invention, even if a plurality of switches for selecting data fail and are turned on at the time of power-on, data having a high priority is selected and based on the selected data. Can drive the sewing machine,
Also, when the switch is turned on after the power is turned on, if it is a normal switch or a faulty switch that has returned to normal after the power is turned on, it can be selected and set in place of the above priority data. It is possible to obtain the effect that the work efficiency is remarkably improved because the selection is not disabled.

[Brief description of drawings]

FIG. 1 is a front view of a sewing machine according to this embodiment.

FIG. 2 is an electric circuit of this embodiment.

FIG. 3 is a flowchart of pattern selection failure control.

FIG. 4 is a block diagram showing the configuration of the present invention.

[Explanation of symbols]

 10 is a selection switch, and SW1 to SW5 are operation switches.

Claims (1)

Claim: What is claimed is: 1. First storage means for storing a plurality of different sewing data, and each storage data is arranged corresponding to each sewing data and can be turned on or off in association with a manual operation. And a plurality of switches having a predetermined priority set, a reading means capable of reading the corresponding sewing data from the first storage means in relation to the ON state of each switch, and a reading in relation to the start signal. A sewing machine that forms a stitch based on the selected sewing data, a first judging means for judging the ON or OFF state of each switch when the power is turned on, and the ON judgment by the first judging means. When there are a plurality of switches that are determined to be in the ON state by the second storage unit that performs the switched switch and the first determination unit, the priority order of those switches is determined. Second determining means, first operating means for operating the reading means so as to read the sewing data corresponding to the switch having a high priority by the second determining means, and the second storing means after the power is turned on. A deletion means for deleting the memory of the switch from the second storage means in relation to the stored switch being switched from the on state to the off state, and being related to the switch being switched from the off state to the on state after the power is turned on. Then, the discriminating means for discriminating whether or not the switch is stored in the second storing means and the switch stored in the second storing means by the above discrimination is replaced with the sewing data corresponding to the priority switch. And a second operating means which acts on the reading means so as to read the sewing data corresponding to the switch, and a controller for the data selecting means of the sewing machine.