Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1982-06-11
1985-02-26
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
318632, 364141, G05B 1942
Patent
active
045019983
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The present invention relates to improvements in a numerical controller equipped with an optional block skip function.
Conventional apparatuses of this kind are arranged so that if a special character, such as a slash (the symbol "/"), is present in a cutting program block at the head thereof, when an optional block skip switch on an operator panel is ON, information concerning the block is skipped and regarded as invalid. The information concerning the block is regarded as valid and delivered out to a buffer storage circuit for execution only when the switch is OFF. That is, the prior art apparatuses only permit the option of whether to execute a predetermined block in a specified section in a series of programs.
Accordingly, one has the option of cutting a plate as shown in FIG. 1 and boring at positions 10 and 11 in a certain lot and, in the next lot, boring only at the position 10 after cutting. However, one does not have the option of boring at a position 12 instead of 11 after the cutting in the next lot.
SUMMARY OF THE INVENTION
The present invention has for its object to enable the selection of a desired block in a certain specified section in an execution program, thereby to extend the optional block skip function. According to the present invention, a specified block includes skip object indicating information and skip select information, which serves as data for deciding whether to skip over the block and which can assume at least two values. The skip select information, which can take a binary value, can be used to select an optional block from a plurality of blocks.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cutting diagram used for explaining the operation of a prior art example;
FIG. 2 is a block diagram illustrating the principal part of equipment embodying the present invention;
FIG. 3 is a cutting diagram explanatory of the operation of the equipment shown in FIG. 2;
FIGS. 4, 5 and 7 are plan views showing block select switches; and
FIG. 6 is a cutting diagram explanatory of another embodiment of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 2 is a block diagram illustrating the principal part of equipment embodying the present invention. Reference numeral 20 indicates a tape reader, 21 a memory, 22 a changeover circuit or switch, 23 is a block select switch, 24 a block skip circuit, 25 a buffer memory circuit, 26 a data processing unit, and TP a command stage. FIG. 3 is a cutting diagram explanatory of the operation of the equipment shown in FIG. 2, reference numerals 30 to 32 indicating the positions where holes are to be made.
In order to make a hole at one of the positions 30 to 32 (as specified by the operator) in FIG. 3, three blocks, such as those given below, are inserted in a section of boring steps in a cutting program: object indicating information specifying that the block is the object of optional block skip control, and the characters "1", "2" and "3" immediately following the slash are skip select information for deciding whether to skip the block. Incidentally, "N 1 2 3" is a sequence number; "G 8 1 X 3 0 . . . ", G 8 1 X 3 1 . . . ", "G 8 1 X 3 2 . . . " are data words instructing boring operations at the positions 30 to 32; and " " is a character indicating the end of the block.
The program, having inserted therein such three blocks as mentioned above, is stored in the form of a command tape TP by punching a numerical information storage medium, such as a paper tape, or the program is stored as numerical information directly in the memory 21.
On the operator panel is further provided the block select switch 23 for entering information as to which ones of the blocks stored as the objects of the optional block skip control in the numerical information storage medium are to be made valid and invalid during actual cutting. The block select switch 23 is, in concrete terms, comprised of three switches 40, 41 and 42 corrsponding to the skip select information 1, 2 and 3, for instance, as shown in a plan
REFERENCES:
patent: 3934186 (1976-01-01), Hayakawa
patent: 4011437 (1977-03-01), Hohn
patent: 4025838 (1977-05-01), Watanabe
patent: 4140953 (1979-02-01), Dunne
patent: 4314329 (1982-02-01), Crewe et al.
patent: 4348623 (1982-09-01), Kobayashi et al.
Kawamura Hideaki
Miyata Mitsuto
Nagamine Tsuyoshi
Nozawa Ryoichiro
Dobeck B.
Fujitsu Fanuc Limited
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