DE4020885A1 - Setting pulse voltage level for heating resistance of ink jet printer - comparing measured resistance with stored value in electronic unit - Google Patents

Setting pulse voltage level for heating resistance of ink jet printer - comparing measured resistance with stored value in electronic unit

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Publication number
DE4020885A1
DE4020885A1 DE19904020885 DE4020885A DE4020885A1 DE 4020885 A1 DE4020885 A1 DE 4020885A1 DE 19904020885 DE19904020885 DE 19904020885 DE 4020885 A DE4020885 A DE 4020885A DE 4020885 A1 DE4020885 A1 DE 4020885A1
Authority
DE
Germany
Prior art keywords
resistance
pulse voltage
measured
additional
ink jet
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.)
Ceased
Application number
DE19904020885
Other languages
German (de)
Inventor
Wolfgang Dipl Ing Schullerus
Harald Dipl Ing Schulz
Wolfgang Dr Ing Wehl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE19904020885 priority Critical patent/DE4020885A1/en
Publication of DE4020885A1 publication Critical patent/DE4020885A1/en
Ceased legal-status Critical Current

Links

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
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04506—Control methods or devices therefor, e.g. driver circuits, control circuits aiming at correcting manufacturing tolerances
    • 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
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04541—Specific driving circuit
    • 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
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/0458—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads based on heating elements forming bubbles

Abstract

An ink jet print head has a series of heating resistors (H1-H4) coupled to contacts (K1-K4) and operated in a pulsed mode to generate ink droplets from the nozzles. Coupled to the elements, a reference resistor (RZ) has a switch in parallel (LS). The value of the resistor is measured in a test cycle and compared with a stored value. The difference is used to control the pulse voltage and provide an optimum value.

Description

Die Erfindung betrifft ein Verfahren zur Einstellung der opti­ malen Impulsspannung zur Stromversorgung der auf einem Spritz­ modul für Tintendruckköpfe angeordneten Heizwiderstände sowie eine Schaltungsanordnung zur Durchführung des Verfahrens.The invention relates to a method for adjusting the opti paint pulse voltage to power the on a spray module for heating resistors arranged as well as a circuit arrangement for performing the method.

Zum Aufheizen der in Kanälen eines Spritzmoduls befindlichen Tinte werden Heizwiderstände benutzt, die sich unmittelbar vor den Düsenaustrittsöffnungen des Druckkopfes befinden. Die Heiz­ widerstände werden in einem Dünnschicht-Sputterprozeß herge­ stellt. Dabei wird in Bereichen, die von einer fotographisch erstellten Maske bestimmt werden, als Widerstandsmaterial HfB2 aufgesputtert. Die Dicke der aufgesputterten Widerstandsschicht bestimmt neben dem Material und der Fläche den sich ergebenden Dünnfilmwiderstand.Heating resistors are used to heat the ink in the channels of a spray module, which are located directly in front of the nozzle outlet openings of the print head. The heating resistors are manufactured in a thin-film sputtering process. In this case, the resistance material HfB 2 is sputtered on in areas that are determined by a photographically created mask. In addition to the material and the area, the thickness of the sputtered resistance layer determines the resulting thin film resistance.

Die Dicke der Sputterschicht unterliegt maschinenbedingt loka­ len Schwankungen. Diese Schwankungen sind zwar örtlich genau vorhersehbar, lassen sich aber normalerweise nicht vermeiden oder kompensieren.The thickness of the sputter layer is subject to loka due to the machine len fluctuations. These fluctuations are locally accurate predictable, but usually cannot be avoided or compensate.

So schwanken die Werte der Heizwiderstände verschiedene Spritz­ module um ± 10%. Innerhalb eines Spritzmoduls bleiben aller­ dings die Widerstandsschwankungen sehr gering.So the values of the heating resistors fluctuate different spray modules by ± 10%. Everyone stays within one injection module However, the fluctuations in resistance are very small.

Die Heizwiderstände werden durch einen Spannungsimpuls kurz­ zeitig angesteuert. Diese Spannung ist daher zusammen mit dem Wert der Heizwiderstände für die exakte Funktion des Tinten­ druckkopfes von entscheidender Bedeutung. Bedingung für einen gleichbleibenden Tintenausstoß z. B. bei Auswechseln des Druck­ kopfes ist also eine Optimierung der Impulsspannung. The heating resistors are made short by a voltage pulse timed. This tension is therefore together with the Value of the heating resistors for the exact function of the ink print head of vital importance. Condition for one constant ink output z. B. when changing the pressure So head is an optimization of the pulse voltage.  

Es ist Aufgabe der Erfindung, ein Verfahren zur optimalen Ein­ stellung der Impulsspannung anzugeben.It is an object of the invention to provide a method for optimal one position of the pulse voltage.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß der/die Widerstandswerte eines oder mehrerer auf dem Spritzmo­ dul befindlicher Widerstände durch eine Druckerelektronik ge­ messen werden, daß die Meßwerte mit einem in der Druckerelek­ tronik gespeicherten Wert verglichen werden und daß die opti­ male Impulsspannung entsprechend dem gemessenen Widerstands­ wert im Drucker eingestellt wird.This object is achieved according to the invention in that the resistance value (s) of one or more on the Spritzmo dul located resistors ge by printer electronics will measure that the measured values with one in the printer elec tronics stored value are compared and that the opti Male pulse voltage according to the measured resistance value is set in the printer.

Durch dieses Verfahren können werksseitige Abgleichmaßnahmen entfallen. Insbesondere bei austauschbaren Einwegdruckköpfen ist eine gleichbleibende Druckqualität gewährleistet.This procedure allows factory adjustment measures omitted. Especially with replaceable disposable printheads consistent print quality is guaranteed.

Eine vorteilhafte Ausführungsform der Erfindung besteht darin, daß zumindest ein auf jedem Spritzmodul befindlicher zusätzli­ cher Widerstand gemessen wird.An advantageous embodiment of the invention consists in that at least one additional on each injection module resistance is measured.

Somit ist während des Druckbetriebes unabhängig von Temperatur­ einflüssen eine optimale Impulsspannung einstellbar. Der zu­ sätzliche Widerstand stellt einen Referenzwiderstand dar.It is therefore independent of temperature during printing influence an optimal pulse voltage adjustable. The too additional resistance represents a reference resistance.

Eine andere vorteilhafte Ausbildungsform besteht darin, daß ein oder mehrere Heizwiderstände durch Umschalten der Kontakte ge­ messen werden.Another advantageous form of training is that a or several heating resistors by switching the contacts will measure.

Damit entfällt der separate Referenzwiderstand. Stattdessen muß der Widerstandswert durch Umschalten der Kontakte gemessen wer­ den.This eliminates the separate reference resistor. Instead, must the resistance value is measured by switching the contacts the.

Eine Schaltungsanordnung zur Durchführung des Verfahrens kann darin bestehen, daß auf jedem Spritzmodul zumindest ein zusätz­ licher, zu den Heizwiderständen identischer Widerstand angeord­ net ist. A circuit arrangement for performing the method can consist in that at least one additional on each injection module Licher, identical to the heating resistors arranged is not.  

Zweckmäßigerweise ist dann der Widerstandswert des zusätzlichen Widerstandes über getrennte Kontakte durch die Druckerelektro­ nik meßbar.The resistance value of the additional is then expedient Resistance via separate contacts through the printer electrical not measurable.

Um einen zusätzlichen Kontakt einzusparen, ist es vorteilhaft, daß der zusätzliche Widerstand parallel zu einem auf dem Spritzmodul befindlichen Läppschalter angeordnet ist.To save an additional contact, it is advantageous to that the additional resistance is parallel to one on the Spray module located lapping switch is arranged.

Um andere zusätzliche Aufgaben zu übernehmen, ist es zweck­ mäßig, daß je ein zusätzlicher Widerstand an verschiedenen Gruppenleitungen des Spritzmoduls geschaltet ist.It is useful to take on other additional tasks moderate that an additional resistance at different Group lines of the injection module is switched.

Im folgenden sei das Verfahren sowie die Schaltungsanordnung zur Durchführung des Verfahrens anhand von vier Figuren näher erläutert.The following is the method and the circuit arrangement to carry out the method with reference to four figures explained.

Es zeigenShow it

Fig. 1 eine Prinzipdarstellung des Verfahrens nach der Erfin­ dung, Fig. Dung 1 a schematic diagram of the method according to the OF INVENTION,

Fig. 2 und 3 eine Darstellung der Heizwiderstände mit einem zusätzlichen Referenzwiderstand und Figs. 2 and 3 is an illustration of the heating resistors with an additional reference resistor and

Fig. 4 eine Darstellung der Heizwiderstände, wobei jeweils ein Referenzwiderstand an verschiedene Gruppenleitungen des Spritz­ moduls angeschaltet ist. Fig. 4 is a representation of the heating resistors, wherein a reference resistor is connected to different group lines of the spray module.

Nach Fig. 1 ist mit U1 die ungeregelte Versorgungsspannung be­ zeichnet, die normalerweise bei angesteuerten Heizelementen im­ pulsartig angelegt wird. Zur Erzielung einer optimalen Impuls­ spannung kann auf dem Spritzmodul ein Meßwiderstand R angeord­ net sein, der an einen Spannungsregler E angeschlossen ist. Dieser regelt die Impulsspannung auf einen optimalen Wert ein, so daß an die anzusteuernden Heizelemente eine geregelte Ver­ sorgungsspannung U2 angelegt wird. Als Meßwiderstand R können auch ein oder mehrere Heizwiderstände herangezogen werden. FIG. 1 is characterized with U 1 be the unregulated supply voltage is applied in a pulsed manner normally driven heating elements in. In order to achieve an optimal pulse voltage, a measuring resistor R can be arranged on the injection module, which is connected to a voltage regulator E. This regulates the pulse voltage to an optimal value so that a regulated supply voltage U 2 is applied to the heating elements to be controlled. One or more heating resistors can also be used as measuring resistor R.

In der Darstellung nach Fig. 2 sind die Heizwiderstände H1, H2, H3, H4 angedeutet, die über elektrische Verbindungen mit den Kontakten K1, K2, K3, K4 in Verbindung stehen. Ein zusätz­ licher Widerstand R1 bildet einen Referenzwiderstand, der mit einem Kontakt K5 verbunden ist.In the illustration of FIG. 2, the heating elements H 1, H 2, indicated H 3, H 4, which are connected via electrical connections with the contacts K 1, K 2, K 3, K 4. An additional resistance L 1 forms a reference resistance, which is connected to a contact K 5 .

Eine andere Anordnung des Referenzwiderstandes ist in Fig. 3 dargestellt. Es sind wiederum die Heizwiderstände H1, H2, H3, H4 erkennbar, die mit den Kontakten K1 bis K4 verbunden sind. Der zusätzliche Widerstand R2 ist parallel zu einem Läppschal­ ter LS geschaltet. Sowohl Läppschalter LS als auch der Refe­ renzwiderstand sind mit den Kontakten K5 und K6 verbunden.Another arrangement of the reference resistor is shown in FIG. 3. Again, the heating resistors H 1 , H 2 , H 3 , H 4 can be seen , which are connected to the contacts K 1 to K 4 . The additional resistor R 2 is connected in parallel to a Läppschal ter LS. Both the lapping switch LS and the reference resistor are connected to the contacts K 5 and K 6 .

Die Heizwiderstände auf den Spritzmodulen können in verschiede­ ne Gruppen aufgeteilt sein. Die Fig. 4 zeigt drei verschiedene Gruppen G1, G2, G3. Die Gruppen G1 und G2 sind zusätzlich zu den Heizwiderständen H5, H6 mit Widerständen R3, R4 beschaltet. Dabei kann nun beispielsweise der Widerstand R3 den Referenz­ widerstand bilden, der Widerstand R4 einen Temperatursensor.The heating resistors on the spray modules can be divided into different groups. Fig. 4 shows three different groups G 1, G 2, G 3. The groups G 1 and G 2 are connected in addition to the heating resistors H 5 , H 6 with resistors R 3 , R 4 . The resistance R 3 can now form the reference resistance, the resistance R 4 a temperature sensor.

Claims (7)

1. Verfahren zur Einstellung der optimalen Impulsspannung zur Stromversorgung der auf einem Spritzmodul für Tintendruckköpfe angeordneten Heizwiderstände, dadurch gekennzeichnet, daß der/die Wi­ derstandswerte eines oder mehrerer auf dem Spritzmodul befind­ licher Widerstände (R, R1, R2, R3) durch eine Druckerelektro­ nik (E) gemessen werden, daß die Meßwerte mit einem in der Druckerelektronik gespeicherten Wert verglichen werden und daß die optimale Impulsspannung (U2) entsprechend dem gemessenen Widerstandswert im Drucker eingestellt wird.1. A method for setting the optimum pulse voltage for the power supply of the heating resistors arranged on a spray module for ink print heads, characterized in that the resistance value (s) of one or more resistors (R, R 1 , R 2 , R 3 ) located on the spray module a printer electronics (E) are measured, that the measured values are compared with a value stored in the printer electronics and that the optimal pulse voltage (U 2 ) is set in accordance with the measured resistance value in the printer. 2. Verfahren nach Anspruch 1, dadurch gekenn­ zeichnet, daß zumindest ein auf jedem Spritzmodul be­ findlicher zusätzlicher Widerstand (R1, R2, R3) gemessen wird.2. The method according to claim 1, characterized in that at least one on each injection module be sensitive additional resistance (R 1 , R 2 , R 3 ) is measured. 3. Verfahren nach Anspruch 1, dadurch gekenn­ zeichnet, daß ein oder mehrere Heizwiderstände (H1-H6) durch Umschalten der Kontakte gemessen werden.3. The method according to claim 1, characterized in that one or more heating resistors (H 1- H 6 ) are measured by switching the contacts. 4. Schaltungsanordnung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß auf jedem Spritzmodul zumindest ein zusätzlicher zu den Heizwi­ derständen identischer Widerstand (R1, R2, R3) angeordnet ist.4. A circuit arrangement for carrying out the method according to claim 1, characterized in that at least one additional resistor (R 1 , R 2 , R 3 ) which is identical to the Heizwi is arranged on each injection module. 5. Schaltungsanordnung nach Anspruch 4, dadurch ge­ kennzeichnet, daß der Widerstandswert des zusätz­ lichen Widerstandes (R1) über getrennte Kontakte durch die Druckerelektronik meßbar ist.5. Circuit arrangement according to claim 4, characterized in that the resistance value of the additional union resistance (R 1 ) can be measured via separate contacts by the printer electronics. 6. Schaltungsanordnung nach Anspruch 4, dadurch ge­ kennzeichnet, daß der zusätzliche Widerstand (R2, R3) parallel zu einem auf dem Spritzmodul befindlichen Läpp­ schalter (LS) angeordnet ist. 6. Circuit arrangement according to claim 4, characterized in that the additional resistor (R 2 , R 3 ) is arranged in parallel with a lapping switch (LS) located on the injection module. 7. Schaltungsanordnung nach Anspruch 4, dadurch ge­ kennzeichnet, daß je ein zusätzlicher Widerstand (R3, R4) an verschiedenen Gruppenleitungen des Spritzmoduls ge­ schaltet ist.7. Circuit arrangement according to claim 4, characterized in that an additional resistor (R 3 , R 4 ) is switched to different group lines of the injection module GE.
DE19904020885 1990-06-29 1990-06-29 Setting pulse voltage level for heating resistance of ink jet printer - comparing measured resistance with stored value in electronic unit Ceased DE4020885A1 (en)

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DE19904020885 DE4020885A1 (en) 1990-06-29 1990-06-29 Setting pulse voltage level for heating resistance of ink jet printer - comparing measured resistance with stored value in electronic unit

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DE19904020885 DE4020885A1 (en) 1990-06-29 1990-06-29 Setting pulse voltage level for heating resistance of ink jet printer - comparing measured resistance with stored value in electronic unit

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DE4020885A1 true DE4020885A1 (en) 1992-01-09

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0650837A2 (en) * 1993-10-29 1995-05-03 Hewlett-Packard Company Energy management scheme for an ink-jet printer
EP0650838A2 (en) * 1993-10-29 1995-05-03 Hewlett-Packard Company Thermal turn on energy test for an ink-jet printer
US5943069A (en) * 1992-10-15 1999-08-24 Canon Kabushiki Kaisha Ink jet recording head and apparatus in which recording is controlled in accordance with calculations involving a measured resistance
EP1142715A1 (en) * 2000-04-03 2001-10-10 Canon Kabushiki Kaisha Printhead as well as printing apparatus comprising such printhead
AU747257B2 (en) * 1992-10-15 2002-05-09 Canon Kabushiki Kaisha Ink jet recording apparatus
WO2002055310A1 (en) * 2001-01-09 2002-07-18 Encad, Inc. Ink jet printhead quality management system and method
US7513588B2 (en) 2005-05-13 2009-04-07 Qisda Corporation Apparatus and method for supplying voltage to nozzle in inkjet printer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988002310A1 (en) * 1986-10-01 1988-04-07 Siemens Aktiengesellschaft System enabling the electrical balancing of transducers arranged in inking heads
DE3730110A1 (en) * 1987-09-08 1989-03-16 Siemens Ag PRINTING DEVICE WITH AN ELECTROTHERMALLY OPERATED PRINT HEAD

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988002310A1 (en) * 1986-10-01 1988-04-07 Siemens Aktiengesellschaft System enabling the electrical balancing of transducers arranged in inking heads
DE3730110A1 (en) * 1987-09-08 1989-03-16 Siemens Ag PRINTING DEVICE WITH AN ELECTROTHERMALLY OPERATED PRINT HEAD

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Patents Abstracts of Japan M-633 der JP-OS 62-1 03 160 *
Patents Abstracts of Japan M-862 der JP-OS 1-1 28 851 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5943069A (en) * 1992-10-15 1999-08-24 Canon Kabushiki Kaisha Ink jet recording head and apparatus in which recording is controlled in accordance with calculations involving a measured resistance
AU747257B2 (en) * 1992-10-15 2002-05-09 Canon Kabushiki Kaisha Ink jet recording apparatus
EP0650837A2 (en) * 1993-10-29 1995-05-03 Hewlett-Packard Company Energy management scheme for an ink-jet printer
EP0650838A2 (en) * 1993-10-29 1995-05-03 Hewlett-Packard Company Thermal turn on energy test for an ink-jet printer
EP0650837A3 (en) * 1993-10-29 1996-01-10 Hewlett Packard Co Energy management scheme for an ink-jet printer.
EP0650838A3 (en) * 1993-10-29 1996-01-10 Hewlett Packard Co Thermal turn on energy test for an ink-jet printer.
US5682185A (en) * 1993-10-29 1997-10-28 Hewlett-Packard Company Energy measurement scheme for an ink jet printer
EP1142715A1 (en) * 2000-04-03 2001-10-10 Canon Kabushiki Kaisha Printhead as well as printing apparatus comprising such printhead
US6523922B2 (en) 2000-04-03 2003-02-25 Canon Kabushiki Kaisha Printhead as well as printing apparatus comprising such printhead
WO2002055310A1 (en) * 2001-01-09 2002-07-18 Encad, Inc. Ink jet printhead quality management system and method
US7513588B2 (en) 2005-05-13 2009-04-07 Qisda Corporation Apparatus and method for supplying voltage to nozzle in inkjet printer

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