Typewriting machines – Including justification or quadding of print-line – By programmed-control-system
Patent
1984-06-11
1987-06-30
Shaw, Gareth D.
Typewriting machines
Including justification or quadding of print-line
By programmed-control-system
400 80, 400 70, 364900, B41J 552
Patent
active
046766740
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO A RELATED APPLICATION
This application is related to U.S. application Ser. No. 619,555 by the same inventors and assigned to the assignee of the present invention.
BACKGROUND OF THE INVENTION
This invention relates to a transportable data input/output unit capable of being detached from the body of a numerical control device.
In numerical control, there are cases where a host computer is used to perform a variety of data processing operations to create command data for the machining of a workpiece. The data created by the host computer is recorded on a paper tape by a tape puncher and, with the paper tape serving as the recording medium, is used as input information for another system. In creating the paper tape, the contents of the tape are printed out by a printer in order to provide a record thereof beforehand. Where an output from the host computer is recorded on the paper tape or printed on recording paper, the paper tape puncher and printer ordinarily are provided separately from the host computer body. These pieces of equipment are connected to the host computer and operate solely in response to commands therefrom. Unlike a system in which such peripheral equipment is of a disjointed nature, a system is conceivable in which the equipment operates on the basis of commands from a host computer when connected to the computer, but in which the contents of a paper tape may be read independently and printed for copying purposes when the equipment is disconnected from the host computer. However, a system of such type can be applied to only very limited systems and is inapplicable to others in certain aspects. Moreover, even where applicable, a disadvantage is that results cannot be obtained unless the host computer software is modified. Furthermore, when printing is performed by a printer, it is customary to print out the first character starting from the left margin of the printing paper. In cases where the printing paper is bound on the left side after printing, some inconvenience is experienced as there is not enough room left on the left side of the paper.
SUMMARY OF THE INVENTION
Accordingly, the object of the present invention is to provide a data input/output unit of a numerical control device in a numerical control system, which input/output unit is detachable from a host computer and includes a tape puncher, tape reader and printer combined into one. The input/output unit has a printer which is capable of leaving a predetermined number of spaces at the left margin of printing paper when command data is to be printed out on the paper.
The present invention provides a processing function which not only enables a data input/output unit to operate in accordance with a command from a host computer in order to create a paper tape, print out transferred data and entered data, but which also enables the unit itself to be programmed independently to create a paper tape and print the data borne by the paper tape. A printer is provided with a tab set counter for setting a number of spaces. The arrangement is such that a number equivalent to a predetermined number of spaces is added to a print number set in a bit counter of the printer, and such that print data indicative of a prescribed number of spaces is set successively at the beginning of print data in a print character register. According to the present invention, there is provided a transportable data input/output unit capable of servicing several numerical control devices, and spaces equivalent to a predetermined number of characters can be left at the left side of a paper to, e.g., facilitate binding of the recording paper.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram of a data input/output unit according to the present invention;
FIG. 2 is a block diagram showing the elements of a printer 6; and
FIG. 3 is a block diagram showing a principal portion of a printer control circuit 6c.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
An embodiment of the present invention will now be described in detail with
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Kishi Hajimu
Mizuno Yutaka
Seki Masaki
Eakman Christina
Fanuc Ltd.
Shaw Gareth D.
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