DE1549726A1 - Arrangement for controlling a line printer - Google Patents

Description

6/38

LIMIIED
No. 1015 Xamikodanaka Kawasaki, Japan

Arrangement for controlling a line printer

The present invention relates to an arrangement for controlling a line printer, and more particularly to an arrangement for driving and controlling the hammer magnet of the line printer in practice. However, these known line printers have become more and more expensive as the speed and performance have increased. On the other hand, electronic calculators have been developed with small dimensions and line printer with small dimensions and small _four operating speeds have become necessary as input and output devices to connect to these computers. To the question of the cost of an electronic calculator with low

iÖtÖ53 / 1387

To improve the dimensions, the line printer must also be made inexpensive. The invention fulfills this demand by making a line printer small in size, at low speed, at low cost, and at high speed Creates reliability.

According to the invention, the known device parts or the printing device can be in the line printer line part can be used without change and also the known parts in the line printer control part can be used without change and the low cost can be obtained by high-speed and high-reliability parts.

Embodiments of the invention will be described with reference to Drawing described in which are Pig. 1 a Sarstellung of the Arbaltsprinzips the arrangement for

Controlling the line printer according to the invention, Pig. 2 a circuit diagram of an embodiment of the magnetic drive

circle, Pig. 3 and 5 basic circuit diagrams of embodiments of the

Control arrangement according to the invention,

Pig. 4 the time diagram of the embodiment according to Flg. 3 and Pig »6 the time diagram of the execution» form according to Pig. 5.

Zn Pig 1 is denoted by 1 a type drum with 120 columns, while 2 a print hammer and hammer magnets with 120 columns, 3 denotes a magnetic drive device with 40 columns and 4 denotes a shift register with 40 bits · As in Pig. 1 see below can

1Ö08B3 / 1387

according to the control arrangement according to the invention the number of Columns used in the magnetic drive device and the shift register included are »1/3 of the number of printing columns made will"

In the arrangement according to the invention, K groups of magnets

driven simultaneously by a magnetic drive circuit, the gap min contains a number of 1 / H. (TS - 2, 3, 4, ...) the number of printing columns, and thus all columns are printed. 40 columns of area 1 are printed by one rotation of type drum 1, 40 columns of area 2 are printed by the next rotation and area 3 is printed by the next but one rotation. During this printing process, the printing paper remains in the same position. In other words, the print cycle for one line contains 3 rotations of the drum. In the pressure area 1, only the switch S1 is closed and the group 1 (GP-1) of the hammer magnet 2 is driven by the magnet drive device 3. At the same time, only the switch S2 is closed in the pressure surface 2 and the group 2 (GP-2) of the hammer magnet 2 is driven by the magnet drive device 3. The area 3. is also printed in the same way.

Referring to FIG. 2, the group 1 magnet of FIG. 1 is represented by H ^, H _1n , while the group 2 magnet is represented by Η «,, H» and the group 3 magnet is represented by H ₅₁ , H _5n . The solenoid drive assembly kit 40 columns is represented by Q ₁ , Q. Switches S ₁ , S ₂ and S ₅ are through thyristors SCR1,

BATH ORIGINAL

1G98S3 / 1387

SCR2, SCR3 are formed which are suitable for controlling a large current. B is the voltage source, Q _n , \, D ₁ , D ₂ and D ₃ are circles to allow the bias current to flow to the thyristors S0R1, SCR2 and SCR3. D ₀ is a blocking diode and Dj ₃ is a mode for preventing a current in the reverse direction. The area 1 is printed at the same time as the start of the print cycle, with the transistor Q _{n being switched} to "On" ¹¹ , and an irrigating pulse is given to the control input terminal St 1 of the thyristor SCRI to switch it "on". Next the transistor Q * of the column to be printed is switched "on" at the same time as the printing clock and then the magnet H _{11 is} driven and the i-th column of the area 1 on the type drum is printed ·.., ...

$ e.nn. the printing of the area .1 is finished, the transistor Q _n is switched "off" once and the hold circuit of SCR1 is short-circuited and SCR1 is switched to "off ¹ * *.

Next, the translator Q _n is switched "on" again and a trigger pulse is given to St2 to switch SCR2 "on". Thus areas 2 and 3 are printed in the same way as in the case of area 1.

In the one practical embodiment of the invention Fig. 3 is the cell printer directly connected to an electronic one

Computer CPU connected without switching on a buffer memory, FIG. 4 showing the timing diagram of the embodiment of FIG. 3

The line printer includes a type drum 1, a printing paper 2 a print hammer and bam magnet 3, a diode circuit 4 »

109853 / 13β_7

BATH ORIGINAL

Magnet drive device 5, a shift register 6, an SCR circuit 7, a control free 8 "a type code and time sub-device 9, an amplifier 10" and a time detection circuit 11, a type code register 12 and an allocation circuit 13 The belt and the paper feed device are not shown in the drawing.

The urunddruoksyklua is referring to the timing diagram of the Pig. 4 described. Pig. 4 (a) shows the print cycle for printing a line with 120 columns. The basic commands are 4 commands % print commands Xj, I ₂ and I «, each corresponding to the areas 1» 2, 3 _f and the paper feed command 7 «

First, _{the print command I 1} for printing a paste 1 γόη CPU is given to the line printer and then wei SCR1 (Pig. 2) of the SCR controller 7 is switched to "Bin" by the control truck 8. At the same time Druclczyklus JR1 starts and (XS ¹ U is zurtLckgeführt transferred below the Druckinformatioa. On the other hand, the type code corresponding to the type on the type drum by the! Dypenkode ^ Generatoreinrichtiing 9 is read and amplified by aen amplifier 10 and shaped and is in the Type code register 12. Here, the pressure information sent out τοη OPIT is compared with the type code, which is brought into the type code register 12, at the allocation circuit 13 and the result of the comparison is brought into the shift register 6. When the comparison τοη 40 columns is ended the magnetic drive device 5 by the next timing setting pulse

1Ö8ÖS3 / 1387 '

BATH ORIQINAi-

triggered and the result of the comparison is printed out. By the above process let a letter have been printed out and that Printing of the 40 columns of! Area 1 is carried out when the ! Printing of all 64 letters on the type drum by the printing process described above ends let, the old of the transfer the information begins and ends before the printing.

When the printing of the area 1 is finished as described above, the command I ₂ for bridging the area 2 is given by the CPU and SCR1 in the line printer is turned "Off" and SCR2 is turned "On" and thus the area 2 becomes printed by the same procedure as above. The area 3 is also printed in the same way and when this is finished printing of one cell is finished. When the printing is carried out, the paplerrorehubefehl f is given by GfU and the paper is advanced. When these ί commands have been carried out, the printing process for one line is finished.

Another feature of the invention is that the Commands can be divided into tier commands as described in osen *

The time diagram of lig. 4 (b) shows && n case, in which the commands from CPU in the order of the bridge command X ^ _{9 of} the paper feed command I ₁ , the paper feed _{command I 9 of} the print command I ₂ * ···. can be given »By using this form of execution, unnecessary pressure in the event of pressure slippage can result in :? Wise termiods become »that

1Ö98S3 / 13.87

BATH ORIGINAL

Area 1 printed, the paper advanced by two lines, Area 1 printed, the paper advanced by one line, Area 2 printed and others. will. In the case of the known line printers, in which the printing and the paper feed are carried out by a single command, the printing times for areas 2 and 3 must be spent in vain, as is the case in which only area 1 is actually printed out. Thus, the structure of the cell printer is complicated, while in the arrangement according to the invention. - _; Command is divided into tier single commands and the arrangement works with tier-independent commands that are given without observing any particular command, therefore, the order for the areas that are not printed is not given and the effective order is given, and: no Z ₀ It is consumed in vain and therefore a high-speed process can be obtained

The embodiment of FIG. 5 shows an example of pressure control by a buffer control in which. the line printer contains a buffer memory »T

Fig. 6 shows the timing diagram of the buffer control of Fig. 5, Fig. 6 (a) shows a control arrangement in which a printing cycle PR ends with three rotations of the type drum, and Fig. 6 (b) shows an arrangement _v which the end of the Finds print cycle PR by monitoring the print information and the printing process regardless of the rotation of the type drum.

109853/1367 BATH ORIGINAL

In the Pall the Pig. 6 (a), the printing information, which is _{transmitted from the electronic computer CPU by the Bruckbefehi I 1} , goes through the Snicks expensive and time setting circuit 8 of the Pig. 5 and is stored in the core memory 15. When the print information for one column has been completely transferred to the core memory 15, a line printer is short-circuited in its puncture by the OPU. Wen, "this Infonaationsübertragung I ^ completed is-s _s the line printer goes asu the print cycle PR, and first of DraeksmtersykXus PRS1 begins with the purpose of the surface 1 sa öruckea and .fläche '" 1 (* 1 to 40 columns) of Eerngedäclitnisises read *; t & d the area 1 (1 to 40 columns) of the type drum on the print. The content of the core memory, the

the letter on the Ϊ; pentromsel corresponds to »is read off one after the other and marked with the. I jpenkodsn compared and printed out. When all! Üype types are written »the PESI rope printer closes . PHS2 and a corresponding process is repeated. The printing of all three areas on the type drum is therefore stopped when the type drum has been rotated three times, and here the printing cycle PR is ended. Next, the line printer enters the paper feed cycle PP and the printing paper is fed and, in parallel, the next print information is transmitted (In). In a bit control arrangement described above, the arrangement of the commands by the electronic computer CPU and the type of transmission of the information between atm electronic computer and the kaian

10Ö8S3 / 1367
BATH ORIGINAL

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BATH

compared and printed, but at the point in time of the comparison the column is printed, the coincidence with the type code being obtained and therefore the flag bit of this column being rewritten at the same time as ^w 0 ⁿ , whereby the bridging of the column Y is completed. Darüberfainaus each time "when the core memory is read, this Plagbit BXLf. Found _t vma WSAA alls Elagbits ends in the Pl-s ⁵¹ O "become B ± nd _f the Bruekraterayklus xmd the next: .BruckunterayJclias begizmto In übereinstiEiiauBg with this EiigMtsteueraag Sat & et © la Iteiiefeaatersjklttß inside bucket BreMiäg the lyp-aatEOiasEel · ¥ @ in al ® 2touekinforss.tion®a darfläslie alle leex * are ₉ t / ird © la © 2eitdaw, e2? _S You XFor the one-time reading of the K®rasp © ißliera ₃ d * h _e 40 cleavers ^ is required _? ConsumeMj ie HBgGf ^ s ¹ 10OiU s are so _o b _e f © rfcraneht _β Ssisit can the - Druefcgesehwiaäigkeit dor lsordnmig sash pig. 6 fb) double sc # 'larger than the saeii Fig. β (a) sewn wsrd-sa »

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at the time of the transmission of the teaching su pillars and the number of columns su säfelanj dia jedssoal were printed when the print gate atxage is arlcd, and the satsa height is charged,

1 0985 3 /
BAD On

15A9726

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© _s because when the counted number falls ert with the predicted ¥ printing all columns of Pläche Is beeaöet.

1O9853 / l3.8f BATH ORIGINAL

Claims (2)

j ^ May pidif changed ^ ΦΠ (4 7 7 ß U 6/38 claims 1. Arrangement for controlling a line printer with a Printing device is provided with η columns, the η printing columns which are contained in one line and which prints one line at a time, where η is an integer over 2 1st, characterized in that a drive circuit is provided, which the columns of a part of the printing device with η Columns, and that one line is printed and used as a unit by switching this drive circuit. 2. Arrangement according to claim 1, characterized in that the Drive circuit is switched in sequence by a single pressure command « 3 * arrangement according to claim 1, characterized in that the Drive circuit is switched by several pressure commands. 4 · Arrangement according to claim 1, characterized in that the Another circle to monitor the content of the print information and the print process and to find the endee of pressing is provided and that the drive circuit in sequence without loss of time at the same time as the end of the pressing is switched. 109853/138? Blank page