JPS62116177A - Printing-controlling system - Google Patents

Abstract

PURPOSE:To minimize errors in practical use, by a system wherein when a non-integer-fold movement quantity is designated, errors not more than the minimum movement unit of a printer are summed up, and when the sum exceeds the minimum operational unit, error correction is performed. CONSTITUTION:When a 5mm pitch line feeding is designated through a key input part 12, the information is inputted into an n-register 14. The content of the n-register 14 is outputted to a platen-controlling part 22, and is divided by m0 (=0.42333...) by a divider 221, and the quotient (11.81102...) thus obtained is inputted into an a-register 222. Then, a b-register 223 is cleared, whereby initial setting of the registers 14, 222, 223 is completed. When an output request (c) is given from a printing-controlling part 18 to the platen-controlling part 22, the part 22 causes an adder 224 to add to content of the a-register 222 to the content of the b-register 223, and input the decimal part (0.81102...) (h) of the sum into the b-register 223. The integral part (11) (f) of the sum is multiplied by m1 (11X3=33) by a mutiplier 225, and the product is outputted to a stepping motor 24 to thereby drive a platen 26.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention particularly relates to a printing device in which a print head is moved relative to recording paper by an amount of movement that is an integral multiple of its minimum movement pitch. The present invention relates to a printing control method for controlling the amount of head movement when a movement amount that is a non-integer multiple is specified.

[Prior art and its problems] Conventionally, many printers allow setting of the amount of movement for column feed (carriage movement) and two-line feed (platen feed). inch,
It is usually based on inches, such as 1/4 inch, etc.

Therefore, in such a printer, for example, 5 tu
mm, such as ts, 5.5 era, 6 m, --...
Setting the movement in meters was quite difficult.

For example, if the minimum movement pitch is 1/180 inch (-0,
14111-am), if you want to move in units of 5a, the ideal amount of movement is 5/0.141
11...-35,4333...Pitch (step)
It is. However, since the printer can only move by an integral multiple of the minimum movement pitch, there is no choice but to specify a movement pitch of either 35 pitches or 36 bits.

Therefore, as the number of movements increases, the error becomes larger.

[Object of the Invention] The present invention has been made in view of the above points, and is particularly applicable to a printing device that moves a print head relative to recording paper by a movement amount that is an integral multiple of its minimum movement pitch. In the
It is an object of the present invention to provide a printing control method that can practically minimize errors even when a movement amount that is a non-integral multiple is specified.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention cumulatively adds errors that are less than the minimum movement unit of the printer, and when the cumulatively added error exceeds the above-mentioned minimum movement unit, the error is calculated. The present invention is characterized in that the following corrections are made.

[Embodiments of the invention] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration when used in a word processor, for example, where 10 is a central processing unit (CPU) and 12 is a key manual unit for specifying shift and line pitch. In this case, the pitch can be specified in units of 1, and can be specified in units of 5 to 15 m in units of 0.5a.

14 and 16 are n and N into which the shift and line pitch specified by the key manual section 12 are entered, respectively.
It is a register. 18 is a print control unit including a print buffer 20 that stores data to be printed. 22 is a platen control section, 24 is a step motor, and 26 is a platen. In this case, the platen drive has a resolution of 1/60 inch (3 pitches). Further, 28 is a carriage control section, 30 is a step motor, and 32 is a carriage. In this case, the carriage drive is 171
It has a resolution of 80 inches (minimum movement, 1 pitch). Further, 34 is a print head. Further, 36 is a document memory, and 38 is a display section.

In such a device, first, the line feed pitch and shift pitch are set in the key manual section 12, and then the pitch l is set in the n and N registers 14 and 16. Then, in response to a print command, the print data read out from the document memory 36 is transferred line by line to the print buffer 20.
The data is stored in , and shifting and printing are performed by moving the carriage 32. When printing of one line in the print buffer 20 is completed, the platen 26 is driven to rotate, the line is fed, data for the next line is read from the document memory 36, and printing is repeated.

In this case, the pitch of one-digit line feed is determined by the platen control section 22 and carriage control section 28, respectively.

FIG. 2 shows the configuration of the platen control section 22.
221 is a divider that divides the contents of the n register 14 by mo. This ml is the minimum horizontal movement unit (unit line)
It is. 222 is an a register into which the result of the above-mentioned division is stored, and 223 is a b register into which the decimal part of the addition result by an adder, which will be described later, is stored. 224 is an adder that adds the contents of the a register 222 and the b register 223, and 225 is a multiplier that multiplies the integer part of the addition result by ml. This ml is the minimum movement unit (unit dot). That is, in this case, m O-0,4233
3...-1/60 inch=3 dots ml-3.

The carriage control section 28 has the same configuration as the platen drive section 22, and therefore is not particularly illustrated. However, in this case, ml-0,14111...-1/180 inch=1 dot ml-i.

In such a system, if a line feed of, for example, 5 m pitch is specified by the key operator 12, that information is entered into the n register 14. And this n
The contents of the register 14 are output to the platen control section 22, and the divider 221 divides the contents into m (-0,42333
...). The result (i.e. 11.8110
2...) is placed in the a register 222. Then, the b register 223 is cleared, thereby completing the initial setting of each register 14, 222, 223.

Here, from the print control unit 1st to the platen control unit 2
2, the platen control unit 22 first sends the a and b registers 222 to the adder 224.
And add the contents of 223 11.81102...
・10-11,81102...), the decimal part (
0, 81102...) into the b register 223. Further, the integer part (11) is multiplied by ml (11x 3-33 ) in the multiplier 225, and the result is output to the step motor 24 to drive the platen 26.

By repeating the same operation, the platen control section 22 sequentially outputs the number of printed dots for the 5aII pitch including correction. FIG. 3(a) sequentially shows the addition result, the decimal part stored in the b register 223, and the output.

Similarly, FIG. 3(b) shows the addition result of the carriage control unit 28, the decimal part stored in the b register, and the output in the case of 5-day m-pitch shift.

If there is an output request in the line direction, if the b register of the carriage control unit 28 is cleared to rOJ, the carriage control unit 2
There is no need to initialize 8.

In addition, in the above embodiment, the sum after the decimal point is carried out (the moving amount is rounded down to the decimal part), but by rounding up, the minus quantity of the decimal part is accumulated, and when this minus quantity is larger than the minimum pitch, Negative correction may also be performed.

Furthermore, in the above embodiment, calculations are performed sequentially for each movement, but a memory is provided in which the number of pitches is calculated in advance according to the number of zero rows of movement digits, and the contents are read out at the time of movement. Also good.

[Effects of the Invention] As detailed above, according to the present invention, particularly in a printing device that moves the print head relative to the recording paper by an amount of movement that is an integral multiple of the minimum movement pitch, It is possible to provide a printing control method that can practically minimize errors even when a movement amount that is a non-integral multiple is specified.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a configuration when a print control system according to an embodiment of the present invention is used in a word processor, FIG. 2 is a diagram showing a more detailed configuration of a platen control section, and FIG. )
and (b) are diagrams respectively showing the outputs of the platen control section and the carriage control section sequentially in the form of a table. 10...CPU, 12...Key personnel department, 14...
n register, 16...N register, 18...print control section, 20...print buffer, 22...platen control section, 24.30...step motor, 26...
Platen, 28... Carriage control unit, 32... Carriage, 34... Print head, 36... Document memory, 38... Display unit, 221... Divider, 222...
...a register, 223...b register, 224...
・Adder, 225... Multiplier.

Claims (1)

[Claims] In a printing device that moves the print head relative to the recording paper by an amount of movement that is an integral multiple of its minimum movement pitch, when a movement amount that is a non-integer multiple is specified, the above-mentioned print head is moved by an integral multiple of the minimum movement pitch. When the difference between the total amount of movement and the total amount of movement specified above exceeds the above minimum movement pitch, the above integer times the movement amount plus the correction of the above minimum movement pitch and the above 1. A print control system comprising means for controlling the movement of a print head.