JPS62278606A - Numerical controller - Google Patents

Abstract

PURPOSE:To increase the data processing speed by showing each address word with the head Roman letter and an array of numeric characters 0-9 (designation of a decimal point permitted) and converting the address word into a binary form compression of data. CONSTITUTION:The 26 alphabetic characters A-Z are prepared and A and B, for example, are coded into '1' and '2' respectively. Thus Z has its code '26'. Then an address word consists of an alphabetic character code and the binary numeric value in terms of the style of data set after compression. Here it is permitted for the address word to a decimal point to show the numeric value and therefore the binary numeric value can be divided into an integer part and a decimal part. Then the address word contains an alphabetic character code and the binary numeric value (integer part and decimal part). If an alphabetic character code is shown in 8 bits together with the integer and decimal parts shown in 16 bits respectively, all address words can be shown in (8+16+16) bits, i.e., 40 bits. These 40 bits are equal to the memory capacity equivalent to 5 bytes, i.e., five characters. As a result, an address word usually exceeds five characters in many cases and therefore data can be compressed.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] This invention relates to a storage system for machining programs in a numerical control device.

[Conventional technology]

FIG. 2 is a system configuration diagram of the numerical control II device.

In the figure, (1) indicates the 11 central processing units (hereinafter referred to as CPUs) that are in charge of controlling the entire system, and (2)
+ is a memory device that stores the system control program that is interpreted and executed by this CPU [11], and (3) is a nonvolatile external memo that stores the machining program! J, (41ζ
110 (input/output) interface device, (5) a paper tape input device, and (8) a servo interface for controlling the positioning of the servo motor.

Next, the operation will be explained. The command processing program for the numerical control device (hereinafter abbreviated as NC) is usually bunched onto paper tape, and the paper tape input device (5)
and stored in the external memory (3) via the I10 ink-face (4). The procedure for reading the information on the paper tape (5) and storing it in the non-volatile external memory (3) is stored in advance in the memory device (2) as a system control program. Then, the CPU (1) reads the processing program character by character from the paper tape (5) by interpreting and executing this system control program, and this read information is sent as a processing program via the I10 ink face (4). and non-volatile external memory (3
).

Here, the format of the processing program is a word address method. One machining program consists of multiple blocks, and the last of each block is E.
Feed with OB food.

Each of the above blocks is composed of multiple address words, and the beginning of each address word is one of the alphabetic characters from A to Z, and the numerical information following this alphabetic character is specified as a sequence of multiple digit numbers. . Only one decimal point is allowed in this sequence of numbers, and negative numbers are also allowed. Normally, up to three digits after the decimal point are considered valid.

Next, an example of an address word is shown.

X 123.456 B -24,8 An example of a block is shown below.

Goo x123.456 Z789 EOBMO2E
OB Characters are punched out one by one on the paper tape according to the above format as a processing program.

Here, EOR is used to indicate the end of the entire machining program.
The code is punched out at the end.

An example of a machining program is shown next.

GOOxlOo, 00 Yloo, 00 EOBGOI
Z-200,Floo EOBM02 EQB OR FIG. 3 is a flowchart 1 for storing a machining program into the non-volatile external memory (3). First, in step (31), characters are input one by one into the nonvolatile external memory (3) from the paper tape input device (5) via the I10 interface (4). and steps (32) and (
In step 33), writing is performed to the nonvolatile external memory until EOR is input.

[Problem that the invention seeks to solve]

Conventionally, non-volatile external memory stores the processing program on the paper tape in the same format as it is.
8-bit storage capacity is required for each alphanumeric character, EOB, and EOR. Therefore, to store one machining program, (number of characters used (including EOB) + 1
)x8 bit memory capacity is required.

This invention was proposed in order to store one machining program in a smaller amount of non-volatile external memory, and aims to improve memory usage efficiency compared to conventional storage methods. do.

[Means for solving problems]

This invention makes it possible to store a larger amount of machining programs in a nonvolatile external memory of the same capacity by compressing the information of each block of the machining program.

[Effect]

As mentioned above, each address word consists of the first alphabetic character and 0-9.
This address word r! is expressed as a sequence of numbers (with one decimal point specified). ! Data is compressed by converting it to binary format.

[Embodiments of the invention]

An embodiment of the present invention will now be described with reference to the drawings. 1st
The figure is a flowchart for realizing this invention. First, in step αD, input one character at a time from the paper tape input device. If it is an alphabetic character, an address word is created. In step αD, the address word is compressed and converted, and in step αD, the compressed data is written to non-volatile external memory. I do. Next, when inputting EOB in step 4, in order to clarify the break between blocks, input EOB in step I211.
Output the B code to the nonvolatile external memory (3).

The address word compression method will be specifically explained below.

There are 26 English letters from A to Z. Now, code A as 1, B as 2, and so on.

For example, the code for Z is 26.

The format of the data after compression is determined as follows.

Address word - English character code + binary value Here, in the above address word, the use of a decimal point is allowed when representing a numerical value, so the binary value can be divided into an integer part and a decimal part. Therefore, the address word is: Address word - English character code + binary value (integer part, fractional part) Here, if the English character code is represented by 8 bits, and the integer part and fractional part are each represented by 16 bits, then all address words are: 8+1
It can be expressed with 6+16 bits, or 40 bits. 40
A bit corresponds to 5 bytes, that is, the memory capacity for 5 characters. Here, since the address word usually exceeds five characters in many cases, data compression becomes possible. Note that when the numerical value part is a negative number, the binary values above and below the decimal point may be expressed as two's complement numbers.

Examples of compressed data are shown below in 16-way notation.

Note that there are 3 digits after the decimal point. The data on the right side of the arrow is the data after conversion.

X100.1-123 to 1800640064
．． 010 → OB 007C000 people L
-1,1 groan QCFFFF FF9CY100O
O groan 19 2710 0000 Kokote X100.
Of;t Xl00.100, SoLzrL-1,1
are respectively interpreted as L-1°100. In addition, L-1,
Regarding 1, since it originally has 5 characters, the effect of data compression is not obtained. Also, regarding EOB, it can be distinguished from alphabetic characters by using a code other than 1 to 26.

〔Effect of the invention〕

As described above, according to the present invention, the NC machining program address word can always be expressed in 40 bits.
It is now possible to store a large amount of machining programs in the same capacity non-volatile external memory. Furthermore, since machining program information is converted into binary data and stored, it is possible to speed up data processing within the NC.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the control operation of the present invention, FIG. 2 is a block diagram of the NC, and FIG. 3 is a flowchart 1 showing a conventional method of storing a machining program in a non-volatile external memory. In the figure, (1) is the CPU, (2+ is the memory device, (3) is the non-volatile external memory, (4) is the I10 interface,
(5) is a paper tape input device, and (6) is a servo ink face. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] In a numerical control device with a built-in non-volatile external memory for storing word-addressed machining programs,
A numerical control device characterized by improving the usage efficiency of a nonvolatile external memory by compressing and exchanging a word address consisting of alphanumeric characters and alphanumeric characters into 1-byte information and binary data represented by alphanumeric characters.