JPH01211008A - Numerical controller - Google Patents

Abstract

PURPOSE:To facilitate a working operation by using a working start position storage register and producing an alarm signal when no coincidence is obtained between the working start position stored in said storage register and the working end position. CONSTITUTION:An input processing part 2 which obtains the working data from a working data input medium 1 contains a program coordinate register 2a which always controls the position of a program set by the input working data and a working start position storage register 2b. Furthermore the part 2 has a position comparison means 2c which performs comparison between the working end position stored in the register 2a and the working start position stored in the register 2b and produces an alarm signal when no coincidence is obtained between both positions.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a numerical control device for machining a workpiece according to input machining data, particularly for machining where the machining start position and end position are the same. The present invention relates to a numerical control device suitable for.

[Conventional technology]

For example, when numerically controlling a hole puncher that sequentially drills holes in required locations on a printed circuit board, conventionally the holes were simply drilled according to input machining data.

[Problem to be solved by the invention]

Therefore, if an error occurs in reading input machining data or creating a program for position data, unless the operator notices this, defective machining will continue during continuous machining of the same item, resulting in a large number of defective products. There was a fear that it would come out. One possible solution to this problem is for the operator to monitor the machining status, but this places a heavy burden on the operator and is not practical.

The purpose of the present invention is to avoid burdening the operator.
- It is an object of the present invention to provide a numerical control device that can suppress the occurrence of defective processed products to a minimum ratio.

[Means to solve the problem]

The present invention provides a machining start position storage register that stores the machining start position when performing machining with the same machining start position and end position, and stores the machining start position and end position at the end of machining that are stored in this register. The positions are compared using a position comparing means, and when they do not match, an alarm signal is output.

[Effect]

In the case of machining where the machining start position and end position are the same, if an error occurs in reading input machining data or creating a position data program, the end position of machining will not return to the start position (especially in the case of the incremental method).

Therefore, if the position comparison means compares the end position and the start position at the end of machining and outputs an alarm signal when they do not match, the error can be detected using this alarm signal. If the alarm signal is used, for example, as a processing stop signal or a warning to the operator, the occurrence of defective processed products can be limited to just one without burdening the operator with monitoring the processing status.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an example of a numerically controlled printed circuit board drilling machine to which a numerical control device according to the present invention is applied, and in the figure, 1 is a processing data manual medium such as paper tape, magnetic tape, or computer program storage memory. . Reference numeral 2 denotes an input processing unit that obtains machining data from the input medium 1, which determines the command format of the numerical control program and reads command blocks necessary for actual machining operations. The input processing section 2 includes a program coordinate register 2a that always manages program positions based on input machining data, and a machining start position storage register 2b that stores machining start positions.

It is also equipped with Furthermore, at the end of machining, the input processing section 2 compares the machining end position stored in the program coordinate register 2a and the machining start position stored in the machining start position storage register 2b, and if they do not match, It also includes a position comparison means 2C that sometimes generates an alarm signal. Reference numeral 3 denotes a circuit section that analyzes and calculates the data obtained by the input processing section 2, and the above is a numerical control device section. 4 is driven by the data analysis calculation circuit section 3;
A controlled drive unit controls the processing table 5, a drill (not shown), etc., and performs hole drilling in the printed circuit board 6.

In other words, the apparatus of the present invention has a processing starting point (
position) from P l (X In Y't) to point P2 → P,
・.

Drilling is performed sequentially from ... to point Pn, and the drilling is completed at point Pn.
In the Canadian program that returns to the starting point P1 and finishes machining, when the program should return to point Pt (X+, Y+) due to a machining data reading error or position data programming error,
When processing ends at point PX (X,,Y,), an alarm signal is generated. In such a case, conventionally, if the operator does not notice that processing has ended at point Px, a similar defective processed board will be generated when processing is performed again using the program. The alarm signal is generated when the position comparing means 2c compares the point (Pυ) stored in the machining start position storage register 2b with the point (Pend) stored in the program coordinate register 2a at the end of machining, and when they do not match. , is generated from the position comparison means 2c, and is used for alarm processing such as stopping processing or generating an alarm sound, and prevents the occurrence of defective processed substrates in the future.

FIG. 3 is a flowchart showing the operation of the input processing section 2. As shown in FIG. In FIG. 3, when machining data is input (Stella P S,), it is determined whether or not it is a machining start command (step S8). If it is a machining start command, store the machining start point P in the machining start position storage register 2b (step S,), input the next machining data (step S,), if it is not a machining start command, it is a machining end command. It is determined whether or not it is a machining end command (step S4), and if it is not a machining end command, the machining is executed (step S), and then the next machining data is input (step Sl). If it is a processing end command,
The machining start point P1 stored in the register 2b in step S3 and the contents of the program coordinate register 2a (machining end point, Pend) are compared by the position comparing means 2c (
As a result of the comparison, if they are equal, the end is normal. If they are different, an alarm signal is generated from the position comparing means 2c, and alarm processing is performed (step S,). .

〔Effect of the invention〕

As described above, according to the present invention, it is possible to minimize the occurrence of defective processed products without burdening the operator with monitoring the processing status.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a numerically controlled printed circuit board drilling machine to which the device of the present invention is applied, FIG. 2 is a diagram for explaining the present invention in detail, and FIG. 3 is a flowchart showing the operation of the processing section. 1... Processing data input medium, 2... Input processing section, 2
a...Program coordinate register, 2b...Machining start position storage register, 2C...Position comparison means, 3...
Data analysis calculation circuit section, 4... Drive section, 5... Processing table, 6... Printed circuit board.

Claims (1)

[Claims] 1. In a numerical control device used for machining where the machining start position and end position are the same, there is a machining start position storage register that stores the machining start position, and when machining is completed, the end position and the machining start position storage register are stored. 1. A numerical control device comprising: position comparing means for comparing the starting position of the starting position and outputting an alarm signal when they do not match.