JPH0426446A - Faulty part detecting device in automatic control sewing machine - Google Patents

Abstract

PURPOSE:To quickly execute the detection of a faulty part by reading out operation classification date from a data storge means by a fault data reading- out means, when a fault is detected by a fault detecting means, and displaying this read-out operation classification data by a fault display means. CONSTITUTION:A, B and C denote main programs, and D and E denote interruption programs. In such a state, in the case of executing a sewing operation such as the programs A-B-C-D-E, flag data FL rewritten in such a way as 1-2-3-4-5 at every A-E, at every operation classfication, that is, in each program by a RAM 3. Subsequently, in the case a fault occurs, for instance, in the interruption program E, it is detected by CPU 1 (fault detecting means), and from a CPU 1, an emergency stop signal is outputted to an operating circuit of a motor for driving a main shaft of the sewing machine, and also, an alarm is generated, and the contents of the flag data FL stored in the RAM 3, that is, FL = 5 is read out by the CPU 1 and displayed by a display part 6. As a result, it is detected and displayed that a fault occurs in the course of execution of the program E.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fault detection device in an automatically controlled sewing machine.

[Conventional technology]

Conventionally, in automatic control sewing machines equipped with operation control means for sequentially performing various operations based on a sewing program stored in a program storage means of a control device having a microcomputer, for example, a sensor or a switch is activated during the sewing operation. In the event of a malfunction or poor connection of a lead wire connector, a large and expensive device called a dehacker was used to determine where in the sewing program the failure occurred.

[Problem to be solved by the invention]

However, the conventional failure location detection device is rarely actually used because the device is large and expensive. The sewing machine was used, and the sewing machine was forced to interrupt the sewing operation and diagnose the troublesome parts each time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fault detection device for an automatically controlled sewing machine that can automatically detect and display a fault location in a control program.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an automatic control sewing machine equipped with an operation control means for sequentially performing various operations based on a sewing program stored in a program storage means. a data storage means for storing, a failure detection means for detecting a failure that occurs during the various operations, and reading out the operation type data from the data storage means in response to a failure being detected by the failure detection means. It is constituted by a failure data reading means and a failure display means for displaying the operation type data read by the failure data reading means.

[Operation] In the present invention, different operation type data is stored for each operation by the data storage means, and when a failure occurs during each operation, it is detected by the failure detection means. When a failure is detected by the failure detection means, the failure data reading means reads operation type data from the data storage means, and the read operation type data is displayed by the failure display means. Therefore, the present invention can detect and display failure locations during various operations.

〔Example〕

An embodiment embodying the present invention will be described below with reference to the drawings.

FIG. 3 is a block circuit diagram showing the control device of the automatic control sewing machine. In the figure, numeral 1 indicates a central processing unit (CPU) as an operation control means, and a read-only memory (ROM) 2 as a program storage means for storing sewing programs is connected to the CPU. Same < CP
A random access memory (RAM) 3 is connected to U1 as a data storage means for rewriting and storing different operation type data for each operation of the sewing program. Further, an operation panel 5 equipped with various operation switches (not shown) is connected to the CPUI via an interface (Ilo) 4.

The interface 4 reads various input data such as a bobbin thread counter from the operation panel 5 side,
A display section 6 that displays this data is connected. In this embodiment, the display section 6 is provided with a function as a failure display means.

A valve 8 for controlling, for example, a cylinder for operating a cloth presser member is connected to the CPUI via an interface (I 10) 7, and the opening/closing operation of this valve reciprocates the piston of the cylinder to operate the cloth presser member, etc. I am trying to make it work. Further, a sensor 9 for detecting, for example, a cloth pattern is connected to the interface 7, and the CPU 1 reads whether the sensor 9 is on or off and uses this as an interrupt signal.

FIG. 1 shows a flowchart for sequentially performing various operations based on a sewing program. A and B in the figure.

C indicates a main program, and D and E indicate interrupt programs. Further, the CPUI is configured to run each program A-
If a failure occurs in a sensor or the like in E, it functions as a failure detection means to detect the failure.

To explain the functions of each program here, A is the CPU
and a main program that initializes peripheral ICs, B is a main program that reads the start switch, and C is a main program that waits until interrupt program E finishes execution.

Further, D is an interrupt program that is executed according to the timing when the start switch is turned on, and E is an interrupt program that is executed according to the timing when the sensor 9 is turned on when the interrupt program D is executed.

Now, if you try to execute a sewing operation such as program A-B-C-D-E, RAM 3 will store flak data FL or 1-2-3 for each operation type, that is, for each program storage means. It can be rewritten as 4-5. For example, if a failure occurs in interrupt program E, it is detected by the CPUI (failure detection means), and an emergency stop signal is output from the CPUI to the operating circuit (not shown) of the motor that drives the main shaft of the sewing machine. , an alarm is issued, and the contents of the flag data FL stored in the RAM 3, FL=5, are read out by the CPUI and displayed on the display section 6. As a result, the occurrence of a failure during the execution of program E is quickly detected and displayed.

FIG. 2 is a flowchart showing processing operations when a failure occurs. When a failure occurs in step S1 in any program, an emergency stop and warning are performed in step S2, and an operation stored in the RAM 3 is performed in step S3. Flag data for each type is displayed, and then step S
In step 4, the cause of the failure is analyzed.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be embodied by changing the configuration as desired within the scope of the claims.

〔Effect of the invention〕

As detailed above, the present invention can reliably determine whether a failure has occurred during the processing of any program without using a large and expensive debugger, and can quickly detect the failure location. There is an effect that can be done.

[Brief explanation of the drawing]

FIG. 1 is a flowchart for detecting a failure using the failure location detection device of the present invention, FIG. 2 is an explanatory diagram showing a main program and an interrupt program, and FIG. 3 is a block circuit diagram of the control device. ■... Central processing unit (CPU) as operation control means and failure detection means, 2... ROM as program storage means, 3... RAM as data storage means for storing data on operation types, 6 ...Display unit as a means of failure indication, A-C...Main program, D, E-
...Interrupt program. Patent applicant Brother Industries Co., Ltd. Agent
Patent attorney On 1) Hironobu (and 1 other person)

Claims (1)

[Scope of Claims] 1. In an automatic control sewing machine equipped with an operation control means for sequentially performing various operations based on a sewing program stored in a program storage means, different operation type data is stored for each of the various operations. a data storage means for detecting a failure that occurs during the various operations, and a failure detection means for reading out the operation type data from the data storage means in response to a failure being detected by the failure detection means. 1. A fault location detection device for an automatically controlled sewing machine, comprising: a reading means; and a fault display means for displaying operation type data read by the fault data reading means.