JPH072198B2 - Control device for data selection means of sewing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine in which a plurality of different sewing data are stored in advance in a storage unit and the sewing machine mechanism is controlled based on the data selected and read out from the storage unit by operating an operating 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 each of a plurality of different stitch patterns is stored in advance, and in order to select desired data from the plurality of data, operation switches corresponding to each data are 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 at the time of power-on due to a failure such as a short circuit, a plurality of data are selected at the same time and cannot be processed, and the sewing machine cannot be used. In addition, the work efficiency is lowered, and malfunctions occur in the circuit and the like, which causes a failure of the circuit and the machine, which 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 the switch determined to be the on state by the first determination means. Means, a second determination means for determining the priority of the switches when there are a plurality of switches determined to be in the ON state by the first determination means, and a switch of high priority by the second determination 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 storage means being switched from the on state to the off state after the power is turned on. The deletion means for deleting the memory of the switch from the storage means and the second storage means associated with the switch being switched 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]

[Function] 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 placed on the upper side 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 detecting means 7 arranged between the main shaft and the machine frame of the sewing machine separately detects the rotation angle of the main shaft corresponding to the vertical position of the needle 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 be turned on by the selection operation of the selection button 10 are provided.

Next, the electric circuit will be described. SW1
Through SW5 are switches corresponding to the respective selection switches 10, which are closed by pressing the corresponding button 10 to generate a selection signal, and depending on the frequency of use, for example, SW1.
The order of priority is set sequentially from. 12 is pedal 1
6 is a switch means for generating a signal in association 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 read-out means) therein, 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 the electromagnets 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, when the power is turned on, the microcomputer MC is initially reset by a signal from the initial reset circuit 13 (step-1),
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), and 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 number of the failed switch SW is singular (step-4), and when it is singular, the pattern data 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 judged (step-5, which is the second judging means), and the pattern data of the highest priority switch SW is read from the ROM and written in the RAM (s
step-6, which is the second action means).

Then, it is determined 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), and when it is written, it is determined that the fault has been corrected, 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-10).
-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 after the thread trimming operation at the completion of the pattern sewing, 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 a second action means.

The present invention has the above-mentioned structure, 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 its priority. 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 pattern B data.
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 completion of thread trimming, SW5 The pattern E is not written in the RAM because it is written in the RAM as a failure switch.

Then, when the SW5 is returned to the off state while the sewing machine is being driven or stopped, the writing in 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 when the activation signal is generated, the sewing machine is driven so as to form the sewing based on the data of the pattern E. 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 not written to the RAM and is invalid, 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 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 removed from the RAM as a 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.
Although it was written to the other switches, 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. If the sewing machine can be driven and the switch is turned on after the power is turned on, a normal switch and a faulty switch that returns to normal after the power is turned on can be selected and set in place of the above priority data, and multiple data can be selected. It is possible to obtain the effect that the work efficiency is remarkably improved, because all the data are not selected.

[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)

[Claims] 1. A first storage means for storing a plurality of different sewing data, and a storage means arranged corresponding to each sewing data, which can be turned on or off by a manual operation, and a predetermined priority is set. A plurality of switches, a reading means capable of reading the corresponding sewing data from the first storage means when each switch is in an on state, and a sewing means for forming a stitch by the sewing data read by the start signal, A sewing machine having a first determination means for determining the on or off state of each switch when the power is turned on, and a second storage means for storing the switch determined to be in the on state by the first determination means, When a plurality of switches that are determined to be in the ON state by the first determination means 2 are second determination means that determines the priority of those switches, The first operating means for operating the reading means so as to read the sewing data corresponding to the switch with the higher priority by the second determining means, and the switch stored in the second storage means after the power is turned on are turned off from the on state. Deletion means for deleting the memory of the switch from the second storage means when switching to the state, and determining whether the switch is stored in the second storage means when switching from the off state to the on state after power-on And the reading means so as to read the sewing data corresponding to the switch in place of the sewing data corresponding to the priority switch when a switch other than the switch stored in the second storage means by the above determination is used. And a second operating means for controlling the data selecting means of the sewing machine.