JP2009000815A - Method for adjusting tilt of liquid jetting head, apparatus for adjusting tilt of liquid jetting head and liquid jetting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for adjusting a tilt of a liquid jetting head in which the tilt of the liquid jetting head can be correctly adjusted, to provide an apparatus for adjusting the tilt of the liquid jetting head, and to provide a liquid jetting apparatus. <P>SOLUTION: In the case of adjusting the tilt of a unit recording head 17, first, voltages are applied respectively to between the unit recording head 17, and right and left both striking surfaces where ink droplets delivered from nozzles 19 located at both right and left ends of a nozzle formation surface 17a of the unit recording head 17 strike. In this state, changes of the voltage values at the time when the ink droplets are delivered from the nozzles 19 are each detected. On the basis of a change of a waveform of the voltage value, a distance between each striking surface and the nozzle formation surface 17a is calculated. Heights of the both right and left ends of the unit recording head 17 are adjusted on the basis of the calculation result so that respective distances between the striking surfaces and the nozzle formation surface 17a agree with each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a liquid ejecting apparatus such as an ink jet printer, a liquid ejecting head tilt adjusting method provided in the liquid ejecting apparatus, and a liquid ejecting head tilt adjusting apparatus.

An ink jet printer (hereinafter referred to as “printer”), which is a type of liquid ejecting apparatus.
Is provided with a recording head (liquid ejecting head) that ejects ink (liquid) supplied from an ink cartridge, and ink is supplied from a nozzle formed on the nozzle forming surface of the recording head to a target fed onto the platen. The printing is performed by jetting.

In recent years, such printers are required to have high-definition printing. For this reason, it is necessary to attach the recording head and the platen in an accurate positional relationship so that the nozzle formation surface of the recording head is parallel to the target feed surface of the platen, and the nozzle formation surface of the recording head and the platen It is necessary to adjust accurately so that the interval (hereinafter referred to as “platen gap”) becomes an appropriate value.

Therefore, conventionally, in such a printer, as shown in Patent Document 1, in a production line or the like, an inspector inserts a gap gauge having an appropriate value width between the nozzle formation surface of the recording head and the platen, Whether or not the platen gap has an appropriate value may be inspected depending on whether or not the gap gauge is inserted.

In this case, if an inspector inserts gap gauges at a plurality of positions between the nozzle formation surface of the recording head and the platen, and checks whether the platen gap has an appropriate value for each position, the recording can be performed. It is also possible to determine whether the nozzle forming surface of the head is inclined with respect to the platen. Then, the inclination of the recording head with respect to the platen may be adjusted based on the determination result.
JP 2004-306373 A (paragraph number [0006])

By the way, as shown in Patent Document 1, when determining whether or not the platen gap of the printer has an appropriate value, usually, the inspector holds the gap gauge in his / her hand while holding the gap gauge in the recording head. Between the nozzle forming surface and the platen. For this reason,
Due to the difference in the insertion of the gap gauge between the inspectors, the nozzle forming surface may be damaged by the gap gauge, and the variation of the judgment criteria may be increased. For this reason, it is difficult to accurately adjust the inclination of the recording head with respect to the platen.

The present invention has been made paying attention to such problems existing in the prior art. It is an object of the present invention to provide a liquid ejecting head tilt adjusting method, a liquid ejecting head tilt adjusting apparatus, and a liquid ejecting apparatus capable of accurately adjusting the tilt of the liquid ejecting head.

In order to achieve the above object, the liquid jet head tilt adjusting method of the present invention is a liquid jet head capable of jetting a liquid charged from a nozzle formed on a nozzle forming surface toward a platen side supporting a target. Between each of the platen and the both ends of the nozzle forming surface of the platen, and a conductive landing surface on which the liquid ejected from the nozzle of the liquid ejecting head is landed. Applying the liquid from the one end side nozzle disposed on one end side of the both ends of the nozzle forming surface to the landing surface facing the one end side nozzle among the respective landing surfaces. The first liquid ejecting step of ejecting and the other end side nozzle disposed on the other end side of both end portions of the nozzle forming surface are opposed to the other end side nozzle of each landing surface. A voltage for detecting a change in voltage value between the landing surface and the nozzle forming surface in the second liquid ejecting stage for ejecting the liquid onto the bullet surface, and in the first liquid ejecting stage and the second liquid ejecting stage, respectively. A detection step, a distance calculation step for calculating a distance between each landing surface and the nozzle formation surface based on a change in each of the voltage values detected in the voltage detection step, and a calculation by the distance calculation step And a height adjusting step of adjusting the heights of both ends of the liquid jet head so that the respective distances between the landing surface and the nozzle forming surface coincide with each other based on the result.

According to the present invention, the distance between each landing surface and the nozzle formation surface is calculated without using a gap gauge, and the distance between each landing surface and the nozzle formation surface is calculated based on the calculation result. The heights of both ends of the liquid jet head are adjusted so as to match. For this reason, it is possible to accurately adjust the inclination of the liquid ejecting head.

The tilt adjustment device for a liquid ejecting head according to the present invention includes a liquid ejecting head capable of ejecting a liquid charged from a nozzle formed on a nozzle forming surface toward a platen that supports a target, and the nozzle formation on the platen. Provided at positions opposite to both ends of the surface,
A voltage applying means for applying a voltage between each of the landing surfaces having conductivity on which the liquid ejected from the nozzle of the liquid ejecting head lands, and a voltage between each of the landing surfaces and the nozzle forming surface. Voltage detection means for detecting a change in value respectively, and distance calculation means for calculating the distance between each landing surface and the nozzle forming surface based on the change in the voltage value detected by the voltage detection means. And a height adjusting means for adjusting the heights of both ends of the liquid jet head so that the respective distances between the respective landing surfaces and the nozzle forming surface coincide with each other based on a calculation result by the calculating means. Equipped with.

According to the present invention, the distance between each landing surface and the nozzle formation surface is calculated without using a gap gauge, and the distance between each landing surface and the nozzle formation surface is calculated based on the calculation result. The heights of both ends of the liquid jet head are adjusted so as to match. For this reason, it is possible to accurately adjust the inclination of the liquid ejecting head.

In the liquid jet head tilt adjusting device of the present invention, the platen is provided with a liquid receiving recess for receiving the liquid at a position facing both ends of the nozzle forming surface, and the landing surface is It is comprised by the upper surface of the liquid absorber which has the electroconductivity accommodated in the liquid receiving recessed part.

According to the present invention, it is possible to quickly absorb the liquid ejected from the nozzle of the liquid ejecting head and landed on the landing surface.
In the tilt adjustment apparatus for a liquid jet head according to the present invention, the upper surface of the liquid absorbent material is flush with the upper surface of the platen.

According to the present invention, the distance between the landing surface and the nozzle formation surface of the liquid ejecting head can be matched with the platen gap that is the distance between the upper surface of the platen and the nozzle formation surface of the liquid ejecting head. Become.

The liquid ejecting apparatus according to the aspect of the invention includes the liquid ejecting head that ejects the liquid, and the tilt adjusting device of the liquid ejecting head configured as described above.
According to the present invention, the same operation and effect as those of the liquid jet head tilt adjusting device described above can be obtained.

Hereinafter, an embodiment in which a liquid ejecting apparatus according to the invention is embodied in an ink jet printer will be described with reference to the drawings.
As shown in FIG. 1, an ink jet printer 11 (so-called as a liquid ejecting apparatus)
The line head printer) includes a main body case 12 having a substantially bottomed square box shape. A platen 13 having a rectangular parallelepiped shape extending in the left-right direction is provided at the lower part in the main body case 12.
In the upper surface 13a of the platen 13, ink receiving recesses 13b as a plurality of liquid receiving recesses are provided at equal intervals along the left-right direction. The platen 13 is a support base that supports the paper P as a target, and feeds the paper P along the front-rear direction based on the driving of a paper feed mechanism (not shown).

On the right and left sides of the platen 13 in the main body case 12 (that is, the width direction of the paper P, which is a direction orthogonal to the feeding direction of the paper P), a right lifting device 14 serving as a square columnar height adjusting means is provided. The left elevating device 15 as a height adjusting means is erected so as to separate the platen 13. Between the lifting devices 14 and 15 above the platen 13 in the main body case 12, a rectangular plate-like support member 16 that is long in the left-right direction is installed. That is, the right end portion of the support member 16 is supported by the right elevating device 14 so as to be movable up and down, and the left end portion of the support member 16 is supported by the left elevating device 15 so as to be movable up and down.

As shown in FIG. 2, a plurality of unit recording heads 17 are arranged on the lower surface of the support member 16 so as to be sequentially adjacent in a staggered manner along the left-right direction. Is configured. The lower surface of each unit recording head 17 is a nozzle forming surface 17a made of a conductive material such as stainless steel. A plurality of nozzles 19 are provided on the nozzle forming surface 17a.
A plurality of nozzle rows 18 are arranged in parallel (see FIG. 3). In the nozzle forming surface 17a of each unit recording head 17, the nozzle rows 18 are arranged in parallel so as to be parallel to each other.

The nozzle forming surface 17 of the unit recording head 17 located at the rightmost end among the unit recording heads 17.
Of the nozzles 19 in a (see FIG. 3), the nozzle 19 positioned at the right end is a right end side nozzle. On the other hand, among the unit recording heads 17, the unit recording head 17 located at the leftmost end.
Nozzle 1 located at the left end of each nozzle 19 (see FIG. 3) on the nozzle forming surface 17a
Reference numeral 9 denotes a left end side nozzle.

Further, an ink cartridge (not shown) is mounted on the main body case 12. An ink cartridge (not shown) is filled with ink as a liquid, and the ink is supplied to each unit recording head 17 via an ink supply tube (not shown).

Then, by driving the piezoelectric element 20 (see FIG. 3) provided in each unit recording head 17, the ink of the ink cartridge (not shown) is supplied to each unit recording head 17, and each nozzle formation surface Printing is performed by ejecting (jetting) ink droplets onto the paper P fed onto the platen 13 from the nozzles 19 of 17a.

As shown in FIGS. 1 and 3, the ink receiving recess 1 provided on the upper surface 13 a of the platen 13.
The ink receiving recesses 13b located at the left and right ends of 3b correspond to the left end side nozzle and the right end side nozzle, respectively. Then, the ink receiving recesses 13b located at the left and right ends.
The upper ink absorbing material 21 and the lower ink absorbing material 22 as the liquid absorbing material are respectively stored in a state of being stacked in the vertical direction, and a mesh shape is formed between these ink absorbing materials 21 and 22. An electrode member 23 is provided.

The upper ink absorbing material 21 is a conductive material (for example, ester urethane resin).
When the voltage is applied to the electrode member 23, the electrode member 23 is configured to have the same potential. The upper surface 21 a of the upper ink absorber 21 is flat and flush with the upper surface 13 a of the platen 13.

Then, the upper ink absorbing material 2 facing the left end side nozzle and the right end side nozzle respectively.
The upper surface 21a of 1 is a left landing surface and a right landing surface, respectively. The lower ink absorbing material 22 is formed of a material (for example, a nonwoven fabric such as felt) having a higher ink holding power than the upper ink absorbing material 21.

As shown in FIGS. 1 and 3, unit recording heads located at both ends of the unit recording head 17 and the electrode members 23 provided in the ink receiving recesses 13 b located at the left and right ends are provided in the main body case 12. A voltage application circuit 30 (a portion surrounded by a two-dot chain line in FIG. 3) is provided between the seventeen nozzle formation surfaces 17a as voltage application means for applying a voltage.

Further, in the main body case 12, a voltage detection circuit 31 (enclosed by an alternate long and short dash line in FIG. 3) as voltage detection means for detecting changes in voltage values between the electrode members 23 and the nozzle forming surfaces 17a. Are provided). The voltage detection circuit 31 integrates and outputs a detection signal from the electrode member 23, an inverting amplification circuit 33 that inverts and amplifies the signal output from the integration circuit 32, and the inverting amplification circuit. The signal output from 33 is A /
And an A / D conversion circuit 34 that performs D conversion and outputs the result to a control device 35 described later.

As shown in FIGS. 4A, 4B, and 4C, the voltage application circuit 30 has a DC power source (for example, so that the electrode member 23 becomes a positive electrode and the nozzle formation surface 17a of the unit recording head 17 becomes a negative electrode. 400V) and a resistance element (for example, 1 MΩ). Therefore, positive charges are respectively charged on the upper surface 21a (the right landing surface and the left landing surface) of the upper ink absorbing material 21, while the nozzles of the unit recording heads 17 positioned at the rightmost end and the leftmost end are formed. On the surface 17a,
Each negative charge is charged.

Next, the electrical configuration of the ink jet printer 11 will be described with reference to FIG.
As shown in FIG. 3, the ink jet printer 11 includes a control device 35 serving as a distance calculating unit and a height adjusting unit. In the input side interface of this control device 35,
Each voltage detection circuit 31 and the like are electrically connected. On the other hand, to the output side interface of the control device 35, the right elevating device 14, the left elevating device 15, each piezoelectric element 20 corresponding to each nozzle 19 and the like are electrically connected.

In the control device 35, a CPU, a ROM, a RAM, and the like are provided. In the ROM, control programs for controlling the ink jet printer 11 (e.g., height adjustment processing of the right end portion of the support member and height adjustment processing of the left end portion of the support member, which will be described later), ink droplets from each nozzle 19 are stored. And a platen gap (hereinafter referred to as “specification PG”) that is a regular distance between the nozzle forming surface 17a of the unit recording head 17 and the upper surface 13a of the platen 13 are stored in advance. The RAM stores various information that can be appropriately rewritten while the ink jet printer 11 is being driven.

In the present embodiment, the right lifting device 14, the left lifting device 15, the voltage application circuit 30, the voltage detection circuit 31, and the control device 35 constitute a liquid jet head tilt adjustment device.

Next, in the control processing routine executed by the control device 35 of the present embodiment, the height of the right end portion of the support member executed when the height of the right end portion of the support member 16 is adjusted before shipment of the ink jet printer 11. The height adjustment processing routine will be described with reference to FIG.

Now, the control device 35 has the right landing surface and the nozzle forming surface 17a of the rightmost unit recording head 17.
(Step S1; voltage application stage). Subsequently, the control device 35 drives the piezoelectric element 20 to eject ink droplets from the right end side nozzle at the ejection speed V (step S2).
First liquid injection stage). At this time, the ink droplets ejected from the right end side nozzle are shown in FIG.
As shown in b), a negative charge is charged. Then, as the ink droplet charged with a negative charge approaches the upper ink absorber 21, the positive charge gradually increases on the right landing surface (the upper surface 21a of the upper ink absorber 21) due to electrostatic induction.

When the ink droplet ejected from the right end side nozzle landed on the right landing surface (the upper surface 21a of the upper ink absorber 21), a part of the positive charge on the right landing surface was charged to the ink droplet. Neutralized by negative charge. As a result, the right landing surface and the nozzle formation surface 1 of the unit recording head 17.
The voltage value between 7a is smaller than the initial voltage value. Thereafter, the voltage value between the right landing surface and the nozzle forming surface 17a of the unit recording head 17 returns to the initial magnitude.

Subsequently, the control device 35 detects a voltage value between the right landing surface and the nozzle forming surface 17a of the unit recording head 17 in step S2 (voltage detection stage), and the right end portion based on the waveform of the voltage value change. A time T from when the ink droplet is ejected from the side nozzle until the ink droplet reaches the right landing surface is calculated (step S3). That is, as shown in FIG. 4, this time T is the first time from the time when the voltage value starts to change in the waveform indicating the change in the voltage value between the right landing surface and the nozzle forming surface 17a of the unit recording head 17. It can be easily obtained by measuring the time to the peak.

Subsequently, the control device 35 determines a platen gap (hereinafter referred to as “right end portion”) that is a distance between the right landing surface flush with the upper surface 13a of the platen 13 and the nozzle forming surface 17a of the rightmost unit recording head 17. Side PG ") is calculated by multiplying the discharge speed V by the time T (step S4; distance calculation stage). Subsequently, the control device 35 reads the specification PG from the ROM, and calculates a value N that is a difference between the specification PG and the right end PG by subtracting the right end PG calculated in step S4 from the specification PG. (Step S5).

Subsequently, the control device 35 determines whether or not the value N calculated in step S5 is 0 (step S6). If the determination result in step S6 is affirmative, the right end side PG is the specification PG
Therefore, the control device 35 ends the height adjustment processing routine of the right end portion of the support member. On the other hand, if the determination result of step S6 is negative, the control device 35
It is determined whether or not the value N calculated in 5 is larger than 0 (step S7).

If the determination result in step S7 is affirmative, the right end side PG is smaller than the specification PG by N, so the control device 35 drives the right lifting device 14 to move the right end side of the support member 16 to the right end side. N is raised (step S8; height adjustment stage), and then the height adjustment processing routine at the right end of the support member is terminated.

On the other hand, when the determination result in step S7 is negative, the right end side PG is larger than the specification PG by N, and thus the control device 35 drives the right lifting device 14 to support member 1.
6 is lowered by N (step S9; height adjustment stage), and then the height adjustment routine of the right end of the support member is terminated.

Next, in the control processing routine executed by the control device 35 of the present embodiment, the height of the left end portion of the support member executed when the height of the left end portion of the support member 16 is adjusted before shipment of the ink jet printer 11. The height adjustment processing routine will be described with reference to FIG.

Now, the control device 35 sets the left landing surface and the nozzle forming surface 17a of the leftmost unit recording head 17.
(Step S11; voltage application stage). Subsequently, the control device 35 drives the piezoelectric element 20 to eject ink droplets from the left end side nozzle at the ejection speed V (step S).
12; second liquid injection stage). At this time, negative charges are charged in the ink droplets ejected from the left end side nozzle as shown in FIG. 4B. Then, as the ink droplet charged with a negative charge approaches the upper ink absorber 21, the left landing surface (the upper surface 21a of the upper ink absorber 21).
), The positive charge gradually increases due to electrostatic induction.

When the ink droplet ejected from the left end side nozzle landed on the left landing surface (the upper surface 21a of the upper ink absorbing material 21), a part of the positive charge on the left landing surface was charged to the ink droplet. Neutralized by negative charge. As a result, the left landing surface and the nozzle formation surface 1 of the unit recording head 17
The voltage value between 7a is smaller than the initial voltage value. Thereafter, the voltage value between the left landing surface and the nozzle forming surface 17a of the unit recording head 17 returns to the initial magnitude.

Subsequently, the control device 35 detects a voltage value between the left landing surface and the nozzle forming surface 17a of the unit recording head 17 in step S12 (voltage detection stage), and the left end portion based on the waveform of the change in the voltage value. A time T from when the ink droplet is ejected from the side nozzle until the ink droplet reaches the left landing surface is calculated (step S13). That is, this time T is as shown in FIG.
In a waveform indicating a change in voltage value between the left landing surface and the nozzle forming surface 17a of the unit recording head 17, it is easily obtained by measuring the time from the time when the voltage value starts to change until the first peak. .

Subsequently, the control device 35 determines a platen gap (hereinafter referred to as “left end portion”) that is a distance between the left landing surface that is flush with the upper surface 13a of the platen 13 and the nozzle forming surface 17a of the leftmost unit recording head 17. Side PG ") is calculated by multiplying the discharge speed V by the time T (step S14; distance calculation stage). Subsequently, the control device 35 reads the specification PG from the ROM and subtracts the left end side PG calculated in step S14 from the specification PG, thereby calculating a value M that is a difference between the specification PG and the left end side PG. (Step S15).

Subsequently, the control device 35 determines whether or not the value M calculated in step S15 is 0 (
Step S16). If the determination result in step S16 is affirmative, the control device 35 ends the height adjustment processing routine for the left end portion of the support member because the left end portion PG is the specification PG. On the other hand, when the determination result of step S16 is negative, the control device 35 determines whether or not the value N calculated in step S15 is greater than 0 (step S17).

If the determination result in step S17 is affirmative, the left end side PG is smaller than the specification PG by M, so the control device 35 drives the left lifting device 15 to move the left end side of the support member 16 to the left end side. The height is increased by M (step S18; height adjustment stage), and then the height adjustment processing routine at the left end of the support member is terminated.

On the other hand, if the determination result in step S17 is negative, the left end side PG is larger than the specification PG by M, so the control device 35 drives the left lifting device 15 to the left end portion of the support member 16. The side is lowered by M (step S19; height adjustment stage), and then the height adjustment processing routine of the left end portion of the support member is ended.

Therefore, when the control device 35 executes the height adjustment processing routine for the right end portion of the support member, the height of the right end portion of the support member 16 is adjusted so that the right end portion side PG matches the specification PG. On the other hand, the height of the left end portion of the support member 16 is adjusted so that the left end portion side PG matches the specification PG by the control device 35 executing the height adjustment processing routine of the left end portion of the support member.

As a result, the right end PG and the left end PG coincide with each other, so that the inclination of each unit recording head 17 with respect to the platen 13 is adjusted. That is, the nozzle forming surface 17a of each unit recording head 17 and the upper surface 13a of the platen 13 are parallel.

As described above, according to the embodiment described in detail, the following effects can be obtained.
(1) The left end side PG and the right end side PG are respectively calculated based on the voltage value change waveform between the left and right landing surfaces and the nozzle forming surface 17a without using a gap gauge, and the calculation results Based on the above, the heights of the left and right ends of the support member 16 that supports each unit recording head 17 are adjusted so that the left end PG and the right end PG coincide with each other. Therefore, the inclination of each unit recording head 17 can be adjusted accurately without damaging the nozzle forming surface 17a of each unit recording head 17.

(2) Since the left and right landing surfaces are constituted by the upper surface 21a of the conductive upper ink absorbent 21 accommodated in the ink receiving recess 13b of the platen 13, the unit recording head 1
Ink discharged from the left end side nozzle 7 and the right end side nozzle 7 and landed on both the left and right landing surfaces can be quickly absorbed.

(3) The upper surface 21a of each upper ink absorber 21 constituting both the left and right landing surfaces is formed on the platen 13.
Therefore, the distance between the left and right landing surfaces and the nozzle forming surface 17a of the unit recording head 17 is set to be equal to the upper surface 13a of the platen 13 and the nozzle forming surface 17a of the unit recording head 17. And the platen gap, which is the distance between the two.

(Example of change)
In addition, you may change the said embodiment as follows.
Ink droplets are ejected from the nozzles 19 located at both ends in the front-rear direction of the nozzle forming surface 17a of the unit recording head 17 to the landing surfaces corresponding to the nozzles 19, respectively.
The height of the front and rear portions of the unit recording head 17 may be adjusted by the same method as in the above embodiment. In this case, the support member 16 is attached to the right lifting device 14 and the left lifting device 15.
A platen gap at the front portion and the rear portion of the nozzle forming surface 17a of the unit recording head 17 is matched by providing a rotation mechanism that rotates about the axis extending in the left-right direction and adjusting the rotation amount of the support member 16. Thus, the height of the front and rear portions of the unit recording head 17 may be adjusted.

The upper surface 21 a of each upper ink absorbing material 21 constituting both the left and right landing surfaces does not necessarily need to be flush with the upper surface 13 a of the platen 13.
The electrode member 23 may be disposed on the upper surface 21 a of the upper ink absorbing material 21, and the left and right landing surfaces may be configured by the upper surface of the electrode member 23. In this case, the ink ejected from the left end side nozzle and the right end side nozzle needs to be configured to land on the upper surface of the electrode member 23 with certainty. Further, in this case, the upper ink absorber 21 does not need to be formed of a conductive material.

In the above embodiment, the liquid ejecting apparatus supplies the ink of the ink cartridge mounted on the carriage to the recording head supported on the lower end of the carriage supported so as to be reciprocally movable along the guide shaft extending in the left-right direction. A so-called on-carriage type printer may be used. In this case, the heights of the left and right ends of the guide shaft are adjusted so that the platen gap, which is the distance to the platen at the left and right ends of the nozzle formation surface of the recording head, coincides.

In the above-described embodiment, the liquid ejecting apparatus can be moved back and forth along the guide shaft extending in the left-right direction by installing the ink cartridge at a place other than on the carriage in the ink jet printer and using the ink supply tube. The printer may be a so-called off-carriage type printer that supplies the recording head supported by the lower end of the carriage supported by the printer. In this case, the heights of the left and right ends of the guide shaft are adjusted so that the platen gap, which is the distance to the platen at the left and right ends of the nozzle formation surface of the recording head, coincides.

In the above-described embodiment, the ink jet printer (printing apparatus including a fax machine, a copier, etc.) 11 that ejects ink has been described as the liquid ejecting apparatus. However, a liquid ejecting apparatus that ejects another liquid may be used. For example, as a liquid ejecting apparatus for ejecting liquids such as electrode materials and color materials used in the manufacture of liquid crystal displays, EL displays and surface-emitting displays, as a liquid ejecting apparatus for ejecting bioorganic materials used in biochip manufacturing, and as precision pipette The sample injection device may be used.

1 is a cross-sectional view illustrating a schematic configuration of an ink jet printer according to an embodiment. FIG. 3 is a plan view showing an arrangement state of unit recording heads of the printer. FIG. 2 is a schematic configuration diagram illustrating an electrical configuration of the printer. (A), (b), (c) is sectional drawing which shows a mode that ink is discharged toward the right landing surface (left landing surface) from the right end side nozzle (left end side nozzle) of a unit recording head. The flowchart which shows the height adjustment process routine of the right end part of a supporting member. The flowchart which shows the height adjustment process routine of the left end part of a supporting member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Inkjet printer as a liquid ejecting apparatus, 13 ... Platen, 13a ... Upper surface of platen, 13b ... Ink receiving recessed part as liquid storing recessed part, 14 ... Right lifting device as height adjusting means, 15 ... Height adjusting means Left side lifting device, 17 ... Unit recording head as liquid jet head, 17a ... Nozzle forming surface, 19 ... Nozzle, 21 ... Upper ink absorbing material as liquid absorbing material, 21a ... Left landing surface and right landing surface The upper surface of the upper ink absorber,
22 ... Lower ink absorbing material as liquid absorbing material, 30 ... Voltage applying circuit as voltage applying means, 31 ... Voltage detecting circuit as voltage detecting means, 35 ... Control device as distance calculating means and height adjusting means, P: Paper as a target.

Claims (5)

A liquid ejecting head capable of ejecting the liquid charged from the nozzle formed on the nozzle forming surface toward the platen side that supports the target, and a position facing both ends of the nozzle forming surface of the platen. A voltage application step of applying a voltage to each of the conductive landing surfaces on which the liquid ejected from the nozzles of the liquid ejecting heads land,
A first liquid ejecting step of ejecting the liquid from one end side nozzle disposed on one end side of both end portions of the nozzle forming surface to a landing surface facing the one end side nozzle among the respective landing surfaces. When,
Second liquid is ejected from the other end side nozzle disposed on the other end side of both end portions of the nozzle forming surface to a landing surface facing the other end side nozzle among the respective landing surfaces. A liquid injection stage;
A voltage detection step of detecting a change in voltage value between the landing surface and the nozzle formation surface in the first liquid ejection step and the second liquid ejection step, respectively.
A distance calculating step of calculating a distance between each landing surface and the nozzle forming surface based on a change in each voltage value detected in the voltage detecting step;
A height adjustment step of adjusting the heights of both ends of the liquid ejecting head so that the respective distances between the landing surface and the nozzle formation surface coincide with each other based on the calculation result of the distance calculation step; A tilt adjustment method for a liquid jet head, comprising: A liquid ejecting head capable of ejecting the liquid charged from the nozzle formed on the nozzle forming surface toward the platen side that supports the target, and a position facing both ends of the nozzle forming surface of the platen. Voltage applying means for applying a voltage between each of the liquid landing surfaces having conductivity on which the liquid ejected from the nozzle of the liquid ejecting head lands, and
Voltage detecting means for detecting a change in voltage value between each landing surface and the nozzle forming surface;
Distance calculating means for calculating the distance between each landing surface and the nozzle forming surface based on the change in each voltage value detected by the voltage detecting means;
Height adjusting means for adjusting the heights of both ends of the liquid jet head so that the respective distances between the respective landing surfaces and the nozzle forming surface coincide with each other based on the calculation result by the calculating means. An apparatus for adjusting the inclination of a liquid jet head, comprising: Liquid receiving recesses for receiving the liquid are provided at positions facing both ends of the nozzle forming surface of the platen,
The liquid ejecting head inclination adjusting device according to claim 2, wherein the landing surface is constituted by an upper surface of a conductive liquid absorbing material accommodated in the liquid receiving recess. The liquid jet head tilt adjustment device according to claim 3, wherein an upper surface of the liquid absorbent material is flush with an upper surface of the platen. A liquid ejecting apparatus comprising: a liquid ejecting head that ejects liquid; and a tilt adjusting device for the liquid ejecting head according to any one of claims 2 to 4.

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