JPS6223671B2 - - Google Patents
Info
- Publication number
- JPS6223671B2 JPS6223671B2 JP54111555A JP11155579A JPS6223671B2 JP S6223671 B2 JPS6223671 B2 JP S6223671B2 JP 54111555 A JP54111555 A JP 54111555A JP 11155579 A JP11155579 A JP 11155579A JP S6223671 B2 JPS6223671 B2 JP S6223671B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- head
- printing
- print head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 230000004886 head movement Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
- B41J2/505—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Dot-Matrix Printers And Others (AREA)
- Impact Printers (AREA)
- Character Spaces And Line Spaces In Printers (AREA)
Description
【発明の詳細な説明】
本発明は、ドツトマトリツクスプリンタの印字
ヘツド駆動回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a print head drive circuit for a dot matrix printer.
一般に、印字ヘツドが印字用紙の横方向に振動
しながら印字を行なうドツトマトリツクスプリン
タにおいては、印字ヘツドが左から右に移動する
時に印刷されたドツトと、右から左に移動する時
に印刷されたドツトとの左右方向の位置合わせ
が、印字品質を向上させる上での大きなポイント
となつている。特に第1図に示す様に、印字ヘツ
ドが1の方向に振動しながらドツトを印刷すると
ともに印字用紙3が2の向きに移動することによ
つて文字等を形成するタイプのプリンタにおいて
は、左右方向のズレがあると印字結果を文字等と
して判別できなくなる恐れさえ生じてしまい、ド
ツト間隔の半分ほどのズレでさえも大きな問題と
なる。このズレの様子を第2図に示す。 In general, in dot matrix printers where the print head vibrates in the horizontal direction of the printing paper to print, some dots are printed when the print head moves from left to right, and some dots are printed when it moves from right to left. Horizontal alignment with the dots is a key point in improving print quality. In particular, as shown in Figure 1, in a type of printer in which the printing head prints dots while vibrating in direction 1, and the printing paper 3 moves in direction 2 to form characters, etc. If there is a misalignment in the direction, there is a risk that the printed result may not be recognized as a character or the like, and even a misalignment of about half the dot spacing poses a major problem. FIG. 2 shows the state of this deviation.
この左右方向のズレを補正するためには種々の
方法が考えられるが、ワイヤインパクトタイプの
印字ヘツドにおいて従来から用いられていた方法
を第3図に示す。以下、第3図に基づいて従来の
方法について説明する。図中、印字ヘツド位置検
出信号4の各パルス、P1,P2……は、印字ヘツド
の移動方向によらず、印字ヘツドの位置に対応し
て出力されるものである。説明のため、P2とP3の
ちようど中間の位置にドツトを印刷しようとした
場合について考える。一般的にワイヤインパクト
印字ヘツドは、駆動電圧印加開始より、実際にワ
イヤが印字用紙に衝突しドツトを印刷するまで
に、ある応答時間が必要である。この応答時間内
に、印字ヘツドは左右方向に移動するので、ヘツ
ドをトリガするタイミングは印刷するタイミング
より応答時間分だけ前になければならない。第3
図では、トリガタイミングの基準となるべき印字
ヘツド位置検出信号として、ヘツドが左から右へ
移動する時にはP1、右から左への移動の時はP4を
定めている。しかし、P1,P4のタイミングで印字
ヘツドをトリガしても左右方向のズレが生じてし
まうので、遅延時間5および5′を設け、印字ヘ
ツドをトリガするタイミングをP1,P4より遅延時
間5および5′だけ遅らせている。第3図中では
7,10が印字ヘツドに駆動電圧を印加するタイ
ミングを表わし、この様子を示している。8,1
1に示す様にプリントワイヤは、駆動電圧印加に
より動き出し、応答時間6および6′後に9,1
2で印字用紙に衝突し、ヘツドを印刷する。この
時、ワイヤが印字用紙に衝突する点9及び12が
左右方向にズレない様に、遅延時間5および5′
を設定すればよいのである。なお、図中7,8,
9はそれぞれ印字ヘツドが左から右へ移動する時
の動作を表わし、10,11,12は逆の時の動
作を表わしている。 Various methods can be considered to correct this horizontal deviation, and FIG. 3 shows a method conventionally used in wire impact type printing heads. The conventional method will be explained below based on FIG. In the figure, each pulse P 1 , P 2 . . . of the print head position detection signal 4 is output corresponding to the position of the print head, regardless of the direction of movement of the print head. For the purpose of explanation, consider the case where a dot is to be printed at an intermediate position after P 2 and P 3 . Generally, a wire impact print head requires a certain response time from the start of application of a driving voltage until the wire actually collides with the printing paper and prints a dot. Since the print head moves left and right during this response time, the timing for triggering the head must be the response time before the timing for printing. Third
In the figure, the print head position detection signal to be used as a reference for the trigger timing is set as P 1 when the head moves from left to right, and P 4 when the head moves from right to left. However, even if the print head is triggered at timings P 1 and P 4 , a shift in the horizontal direction will occur, so delay times 5 and 5' are provided to delay the timing of triggering the print head from P 1 and P 4 . It is delayed by times 5 and 5'. In FIG. 3, numerals 7 and 10 represent the timings at which the driving voltage is applied to the print head, and this situation is illustrated. 8,1
As shown in Figure 1, the printed wire starts moving by applying a driving voltage, and after response times 6 and 6', the print wire moves at 9 and 1.
2, it collides with the printing paper and prints the head. At this time, the delay times 5 and 5' are set so that the points 9 and 12 where the wire collides with the printing paper are not shifted in the horizontal direction.
All you have to do is set . In addition, 7, 8,
9 represents the operation when the print head moves from left to right, and 10, 11 and 12 represent the operation when it is reversed.
以上が従来より用いられていた方法の説明であ
る。一般にワイヤインパクト印字ヘツドは、応答
時間が、ワイヤの飛行距離、ヘツド個有の性能、
及びヘツドに所定のエネルギーを注入するのに要
する時間によつて変化する。同一のプリンターの
場合、飛行距離及びヘツドの性能は同一と考えら
れるので、ヘツドに所定のエネルギーを注入する
のに要する時間、すなわち、ヘツド駆動電圧の変
化によつて、応答時間が変化することになる。従
つて、上記従来の方法によれば、駆動電圧が負荷
の大小、温度の変化、外乱等で変動した場合、応
答時間が変化するにもかかわらず、遅延時間は一
定であるので、次に述べる様な問題点が生じてい
た。 The above is an explanation of the conventionally used method. In general, the response time of a wire impact print head depends on the wire flight distance, the head's unique performance, and
and the time required to inject a given amount of energy into the head. For the same printer, the flight distance and head performance are considered to be the same, so the response time will change depending on the time required to inject a certain amount of energy into the head, that is, the head drive voltage. Become. Therefore, according to the conventional method described above, when the drive voltage fluctuates due to load size, temperature change, disturbance, etc., the delay time remains constant even though the response time changes. Various problems arose.
即ち、駆動電圧が高めに出た場合、必然的に応
答時間6及び6′は短かくなるので、左から右へ
印字ヘツドが移動しながら印字する時は目的とす
る点より左側に、右から左へ印字ヘツドが移動し
ながら印字する時には目的とする点より右側にド
ツトが印刷され、第4図Aに示す印字状態となつ
てしまう。また逆に電圧が低くなつた場合、応答
時間は長くなるので、第4図Bに示す印字状態に
なつてしまう。 In other words, if the drive voltage is high, the response times 6 and 6' will inevitably be shortened, so when printing while the print head moves from left to right, it will move to the left of the target point and from the right. When printing while the printing head moves to the left, dots are printed to the right of the intended point, resulting in the printing state shown in FIG. 4A. On the other hand, if the voltage becomes low, the response time becomes longer, resulting in the printing state shown in FIG. 4B.
本発明の目的は上記従来からの方法の欠点をな
くし、駆動電圧が変動しても左右方向のズレのな
いドツトマトリツクスプリンタの制御方法を提供
することにある。 SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the conventional methods described above and to provide a control method for a dot matrix printer that does not cause horizontal deviation even when the drive voltage varies.
本発明の概要は、上記目的達成のため、駆動電
圧の高い時には遅延時間を長く、駆動電圧の低い
時には遅延時間を短かくして、ヘツド位置検出信
号よりドツト印刷までの時間を一定に保とうとす
る事である。 The outline of the present invention is to achieve the above object by increasing the delay time when the drive voltage is high and shortening the delay time when the drive voltage is low to keep the time from the head position detection signal to dot printing constant. It is.
第5図は本発明の一実施例を示す。14は遅延
回路であつて、印字ヘツド位置検出信号に同期し
て、駆動電圧が高い時には長い、低い時には短か
い幅のパルスを出力する。15は遅延回路の出力
パルス、16は駆動電圧を印加する時間を決定す
る通電パルス決定回路、17はマグネツトドライ
バー、18はワイヤ駆動用マグネツト、19は駆
動電圧、20は位置検出信号に同期した印字信号
である。また遅延回路14内で、21は駆動電圧
19に比例した基準電圧を決める抵抗、22は電
圧比較器、23はフリツプフロツプ、24はトラ
ンジスタ、25,26はRC充電回路の抵抗とコ
ンデンサである。 FIG. 5 shows an embodiment of the invention. Reference numeral 14 is a delay circuit which outputs a pulse having a long width when the driving voltage is high, and a pulse having a short width when the driving voltage is low, in synchronization with the print head position detection signal. 15 is the output pulse of the delay circuit, 16 is the energization pulse determining circuit that determines the time to apply the drive voltage, 17 is the magnet driver, 18 is the wire drive magnet, 19 is the drive voltage, and 20 is synchronized with the position detection signal. This is a print signal. In the delay circuit 14, 21 is a resistor that determines a reference voltage proportional to the drive voltage 19, 22 is a voltage comparator, 23 is a flip-flop, 24 is a transistor, and 25 and 26 are resistors and capacitors of the RC charging circuit.
次に第6図を用いて第5図の回路の動きを説明
する。第6図中、27はコンデンサ26の電圧、
28は抵抗21で決まる基準電圧、29は遅延回
路の出力パルス15の波形、30はワイヤの動き
を示す。まず、初期状態ではフリツプフロツプ2
3はトランジスタ24をONさせる状態で安定し
ている。 Next, the operation of the circuit shown in FIG. 5 will be explained using FIG. 6. In FIG. 6, 27 is the voltage of the capacitor 26,
28 is a reference voltage determined by the resistor 21, 29 is the waveform of the output pulse 15 of the delay circuit, and 30 is the movement of the wire. First, in the initial state, flip-flop 2
3 is stable with the transistor 24 turned on.
印字信号20を受けると、フリツプフロツプ2
3は反転し、トランジスタ24がオフするととも
に出力パルス15はロー状態からハイ状態にな
る。トランジスタ24がオフすることによりコン
デンサ26は抵抗25を通してVccより充電され
る。コンデンサ26の充電電圧が抵抗21で決め
られる基準電圧に達すると、電圧比較器22は反
転しフリツプフロツプ23の状態も反転して、出
力パルス15はロー状態にもどる。通電パルス決
定回路16はこの出力パルス15の立下がりに同
期してマグネツト18に通電を開始する。 When the print signal 20 is received, the flip-flop 2
3 is inverted, the transistor 24 is turned off, and the output pulse 15 changes from a low state to a high state. When the transistor 24 is turned off, the capacitor 26 is charged from Vcc through the resistor 25. When the charging voltage of the capacitor 26 reaches the reference voltage determined by the resistor 21, the voltage comparator 22 is inverted, the state of the flip-flop 23 is also inverted, and the output pulse 15 returns to the low state. The energizing pulse determining circuit 16 starts energizing the magnet 18 in synchronization with the fall of the output pulse 15.
ここで駆動電圧が高い場合には、抵抗21で決
まる基準電圧も高くなるのでコンデンサ26が基
準電圧に達するまでの時間は長くなり、逆に駆動
電圧が低い場合には短かくなる。またマグネツト
18に通電を開始してからプリントワイヤが印字
用紙に達するまでの時間は即ち応答時間は、電圧
が高いほど短かく、低いほど長い。従つて、ヘツ
ド位置検出信号からプリントソレノイドが印字紙
に衝突するまでの時間は、本回路によつて一定に
保つ事ができる。 Here, when the drive voltage is high, the reference voltage determined by the resistor 21 also becomes high, so the time it takes for the capacitor 26 to reach the reference voltage becomes long, and conversely, when the drive voltage is low, it becomes short. Further, the time from the start of energization to the magnet 18 until the print wire reaches the printing paper, that is, the response time, is shorter as the voltage is higher, and longer as the voltage is lower. Therefore, the time from the head position detection signal until the print solenoid collides with the printing paper can be kept constant by this circuit.
本実施例では遅延回路としてCR充電回路を用
いているが、ヘツドの性能、その他によつて決ま
る応答時間の電圧依存性を補正するに適した回路
を用いる事が望ましいことは言うまでもない。ま
たワイヤインパクトドツトヘツドにとゞまらず、
インクジエツト、感熱ヘツド等ヘツド駆動電圧の
変化によつて、トリガされてから実際にドツトが
印刷されるまでの時間が変化するヘツドに対して
は、本発明を応用することができる。 In this embodiment, a CR charging circuit is used as the delay circuit, but it goes without saying that it is desirable to use a circuit suitable for correcting the voltage dependence of the response time, which is determined by head performance and other factors. In addition to wire impact dot heads,
The present invention can be applied to heads such as ink jets and thermal heads where the time from when a trigger is triggered to when a dot is actually printed changes depending on changes in head drive voltage.
また、以上の説明は、印字ヘツドが左右両方向
に移動しながら印字する場合についてのみ行なつ
ているが、上下縦方向への移動にて印字する場
合、また片方向への移動の時のみ印字を行なわせ
る場合にも本発明は適用できる。 Also, the above explanation is only for cases in which printing is performed while the print head moves in both left and right directions, but printing is performed only when it is moved in the vertical and vertical directions, or only when it is moved in one direction. The present invention can also be applied to cases in which this is carried out.
以上述べたきた様に本発明によれば、駆動電圧
の変動があつてもヘツド移動方向のドツト印刷位
置のズレがなくなり次の様なメリツトが生じ、実
用上効果大である。 As described above, according to the present invention, even if there is a fluctuation in the driving voltage, the dot printing position does not shift in the direction of head movement, and the following advantages are produced, which is very effective in practice.
ヘツド駆動電圧のバラツキによらず高い印字
品質を得ることができた。 High printing quality could be obtained regardless of variations in head drive voltage.
ヘツド駆動用電源として高価な安定化電源を
用いる必要がなく、安価な非安定電源を用いる
ことができる。 There is no need to use an expensive stabilized power source as a power source for driving the head, and an inexpensive non-stable power source can be used.
バツテリー駆動の場合、バツテリー電圧調整
の必要がない。 In the case of battery drive, there is no need to adjust the battery voltage.
第1図、第2図は本発明の対象プリンタの印字
方式説明のための図、第3図は従来の方法説明の
ためのタイミングチヤート。第4図は従来の方法
の欠点を説明するための図。第5図は本発明の一
実施例を示す回路構成図。第6図は第5図の回路
を説明するためのタイミングチヤート。
13……本来ドツトが印刷されるべき中心位
置、21……電圧比較器の基準電圧を作るための
抵抗、22……電圧比較器、23……フリツプフ
ロツプ、Vcc……回路の制御用電圧。
1 and 2 are diagrams for explaining the printing method of the target printer of the present invention, and FIG. 3 is a timing chart for explaining the conventional method. FIG. 4 is a diagram for explaining the drawbacks of the conventional method. FIG. 5 is a circuit configuration diagram showing an embodiment of the present invention. FIG. 6 is a timing chart for explaining the circuit of FIG. 5. 13...Center position where the dot should originally be printed, 21...Resistor for creating a reference voltage for the voltage comparator, 22...Voltage comparator, 23...Flip-flop, Vcc...Circuit control voltage.
Claims (1)
より充電される充電電圧とを比較する電圧比較器
よりの出力信号、及び印字を指示する印字信号を
入力とし、該印字信号の発生により付勢され前記
電圧比較器よりの出力信号の発生により該付勢状
態を解除される出力信号を発生させる遅延回路
と、該遅延回路よりの出力信号の付勢状態の解除
の際のエツジに同期して印字ヘツドのドライブを
開始するドライバーとから構成されることを特徴
とするドツトマトリツクス印字ヘツド駆動回路。1 The output signal from the voltage comparator that compares the reference voltage proportional to the head drive voltage with the charging voltage charged from the main power supply and the print signal that instructs printing are input, and the head is activated by the generation of the print signal. a delay circuit that generates an output signal that is released from the energized state by the generation of the output signal from the voltage comparator, and printing in synchronization with the edge of the output signal from the delay circuit when the energized state is released. What is claimed is: 1. A dot matrix print head drive circuit comprising: a driver for starting drive of the print head;
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11155579A JPS5634464A (en) | 1979-08-31 | 1979-08-31 | Drive circuit for dot matrix printing head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11155579A JPS5634464A (en) | 1979-08-31 | 1979-08-31 | Drive circuit for dot matrix printing head |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5634464A JPS5634464A (en) | 1981-04-06 |
JPS6223671B2 true JPS6223671B2 (en) | 1987-05-25 |
Family
ID=14564349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11155579A Granted JPS5634464A (en) | 1979-08-31 | 1979-08-31 | Drive circuit for dot matrix printing head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5634464A (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4362407A (en) * | 1981-09-08 | 1982-12-07 | Piezo Electric Products, Inc. | Piezoelectric printer and piezoelectric multilam actuator used therein |
JPS5864927A (en) * | 1981-09-25 | 1983-04-18 | 株式会社富士機械製作所 | Manufacture of foil material with rib |
JPS5869072A (en) * | 1981-10-22 | 1983-04-25 | Seiko Epson Corp | Method of correcting timing at two-way printing time |
JPS5882764A (en) * | 1981-11-11 | 1983-05-18 | Usac Electronics Ind Co Ltd | Printer with print-deviation regulating mechanism |
JPS60257271A (en) * | 1984-06-04 | 1985-12-19 | Brother Ind Ltd | Serial printer |
JPS62187062A (en) * | 1986-02-13 | 1987-08-15 | Tamura Electric Works Ltd | Apparatus for correcting printing position error of printer |
US4674797A (en) * | 1986-03-25 | 1987-06-23 | Ikeda Bussan Co., Ltd. | Angular position adjustable headrest |
JPH0628928B2 (en) * | 1988-06-25 | 1994-04-20 | 雅雄 大島 | Continuous manufacturing method and continuous manufacturing apparatus for heat-bonded gusset packaging bag without spine sticking part |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5354424A (en) * | 1976-10-28 | 1978-05-17 | Tokyo Electric Co Ltd | Character position adjusting device of dot printer |
-
1979
- 1979-08-31 JP JP11155579A patent/JPS5634464A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5354424A (en) * | 1976-10-28 | 1978-05-17 | Tokyo Electric Co Ltd | Character position adjusting device of dot printer |
Also Published As
Publication number | Publication date |
---|---|
JPS5634464A (en) | 1981-04-06 |
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