MUTOH RJ-900 Service-Handbuch

Technical Bulletin

tib 1006-001

RJ-900 Print Head Alignment

OVERVIEW

As with all printers produced by Mutoh, the head alignment steps on the RJ-900 and RJ-901 are quite

straightforward. These steps are common across the entire Mutoh product line although different names

may be used for each function from time to time.

This bulletin includes the relevant pages from the Mutoh service manual, along with corrections for

instructions that may be inaccurate or out of date.

MATERIALS NEEDED

• #2Philipsscrewdriver-forremovingcoverscrews

• 5xorgreaterpowerloupe

• Flashlight-asingleLEDunitsuchasaMiniMagliteispreferableduetoitsbrightness.Also,a

blueLEDlightmayhelpilluminatetheyellowalignmentpatterns,whichcanbeverydifcultto

see under normal lighting conditions.

• Atleast10to15feetofavailablepaperforprintingthealignmentpatterns.

PROCEDURE

1. StarttheprinterinSelfDiagnosticModebyholdingdowntheUP,DOWN,andRIGHTarrowkeysduring

initialization. Release the keys when the printer displays Check: Test.

2. PresstheRIGHTarrowkeytodisplayCheck:Adjustment.Makesurethatyouhavepaperloadedand

the lever is down before you press ENTER.

3. Using the menu tree shown on the following page as a guide, go through the steps in this order:

a) Nozzlecheck.Thisstepistoensurethattheheadisringproperly.

b) Slantcheck1.Inthisstep,youwillcomparetherst(black)andlast(yellow)channelsto

determineiftheheadisslanted.Thiscanbeadjustedthroughaleveronthesideofthe

head carriage.

c) Slantcheck2.Thispatterndetermineswhetherthereisaverticaladjustment(slant)to

the print head. This step is generally not necessary unless the head carriage has been

replaced or reinstalled.

d) Uni-directionalalignment.Thisadjuststheelectronictimingofeachofthe8channelson

the print head to each print mode (the print mode is a combination of head height and car-

riage speed).

e) Bi-directionalalignment.Thisisasingleadjustmentthatcompensatesforthealternating

directionsofcarriagetravelwhenprintingbi-directionally.Oneadjustmentmustbemade

for each print mode.

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Technical Bulletin

tib 1006-001

RJ-900 Print Head Alignment

RJ-901C/RJ-900C Maintenance Manual 5 Self-Diagnosis Mode

5-21

5.5 Adjustment Menu

In this menu, the printing position can be aligned and media feed operation can be corrected.

The adjustment menu includes the following diagnosis menus.

Table 5-4 Diagnosis Items in Adjustment Menu

Diagnosis item Contents Reference

Skew check Performs media feed and detects the degree of skew in

media feed by the sensor.

"5.5.1 Skew Check

Menu" p.5-24

Head rank input Enters the characteristic value of the print heads in use.

After the entry, charge ink.

"5.5.2 Head Rank

Input Menu" p.5-25

Head nozzle check Prints out a printing to check the ink discharge

performance of the head nozzles.

"5.5.3 Head Nozzle

Check Menu" p.5-26

Head slant check 1 Prints out a printing to check for print head slant

(horizontal direction). Mechanical adjustment must be

performed as necessary.

"5.5.4 Head Slant

Check Menu 1" p.5-28

Head slant check 2 Prints out a printing to check for print head slant (vertical

direction). Mechanical adjustment must be performed as

necessary.

"5.5.5 Head Slant

Check Menu 2" p.5-29

CW adjustment Prints out a printing to adjust uni-direction (CW

direction) printing between nozzles.

Low 1: PG Low 3-peak waveform

Low 2: PG Low 6-peak waveform

High 1: PG High 3-peak waveform

High 2: PG High 6-peak waveform

"5.5.6 CW

Adjustment" p.5-31

Repeatability

adjustment

Prints out a printing to align the positions of the repeated

printings.

Low 1: PG Low 3-peak waveform

Low 2: PG Low 6-peak waveform

High 1: PG High 3-peak waveform

High 2: PG High 6-peak waveform

"5.5.7 Repeatability

Adjustment Menu" p.5-

CCW adjustment Prints out a printing to adjust uni-direction (CCW

direction) printing between nozzles.

Low 1: PG Low 3-peak waveform

Low 2: PG Low 6-peak waveform

High 1: PG High 3-peak waveform

High 2: PG High 6-peak waveform

"5.5.8 CCW

Adjustment" p.5-38

Band feed correction Prints out a printing to correct the media feed amount for

each pass.

"5.5.9 Band Feed

Correction Menu" p.5-

Top & bottom

adjustment

Sets the top & bottom margins. "5.5.10 Top and

Bottom Adjustment

Menu" p.5-42

P_REAR sensor

position adjustment

Adjusts the P_REAR sensor position using cut media. "5.5.11 P_REAR

Sensor Position

Adjustment Menu" p.5-

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Technical Bulletin

tib 1006-001

RJ-900 Print Head Alignment

5 Self-Diagnosis Mode RJ-901C/RJ-900C Maintenance Manual

5-22

Test printing Prints out a nozzle check pattern and adjustment

variables.

"5.5.12 Test

Printing Menu" p.5-44

Head cleaning Cleans the tubes and heads using cleaning liquid. "5.5.13 Head

Cleaning Menu" p.5-45

Software counter

initialization

Clears various software counters. "5.5.14 Software

Counter Initialization

Menu" p.5-46

Feed amount check Used to check the media feed amount per band. "5.5.15 Feed Pitch

Check Menu" p.5-46

Solid print check Performs solid nozzle print check (color selection, nozzle

selection and print direction selection are available).

"5.5.16 Solid Print

Menu" p.5-48

Table 5-4 Diagnosis Items in Adjustment Menu (Continued)

Diagnosis item Contents Reference

Previous menu

Next menu

Previous menu

Next menu Previous menu

Previous menu

Next menu

Previous menu

Next menu

Previous menu

Next menu

Next menu Previous menu

Previous menu

Next menu

Check Skew Menu

Input Rank Menu

Check Nozzle Menu

Head Slant Menu 1

CW Adjustment Menu Low1

Bi-D Adjustment Menu Low1

Bi-D Adjustment Menu Low2

Bi-D Adjustment Menu High1

Bi-D Adjustment Menu High2

Previous menu

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

Head Slant Menu 2

CW Adjustment Menu Low2

CW Adjustment Menu High1

CW Adjustment Menu High2

Previous menu

Next menu

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Technical Bulletin

tib 1006-001

RJ-900 Print Head Alignment

RJ-901C/RJ-900C Maintenance Manual 5 Self-Diagnosis Mode

5-23

CCW Adjustment Menu Low 1

Feed Adjustment Menu

Top & Bottom Adjustment Menu

P_REAR Sensor Position Adjustment Menu

Test Printing Menu

Head Cleaning Menu

Software Counter Initialization Menu

Send Pitch Menu

Fill Pattern Menu

CCW Adjustment Menu Low 2

CCW Adjustment Menu High 1

CCW Adjustment Menu High 2

Previous menu

Next menu

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

[Enter] key

[Cancel] key

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Technical Bulletin

tib 1006-001

RJ-900 Print Head Alignment

5 Self-Diagnosis Mode RJ-901C/RJ-900C Maintenance Manual

5-26

(4) Initial Charging Menu

If the input head rank is determined, the plotter performs initial charging.

5.5.3 Head Nozzle Check Menu

In this menu, the head nozzle printing to confirm ink is fired from nozzles correctly after the ink charge, are

available.To check the head nozzle condition, follow the steps below. To check the head nozzle, follow the steps

below.

1. Set media as necessary.

2. After media is set, the machine prints out head nozzle check patterns in the following modes.

• 1 pass, unidirectional

• PF: 360 dpi

• CR: 360 dpi

3. Check the printed head nozzle check patterns for the following points.

• Ink nozzle discharge amount (omission, discontinuity, meandering)

• Satellite

• T fence

• Nozzle alignment in vertical direction

• Nozzle alignment in horizontal direction

Nozzle check: Prints the patterns in the order of A to H.

Vertical nozzle alignment check: Prints the patterns in the order of A to H.

[Enter] key

After ink cartridge is installed

[Cancel]

key Initial ink chage will not be executed.

Head ID will be updated.

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Technical Bulletin

tib 1006-001

RJ-900 Print Head Alignment

RJ-901C/RJ-900C Maintenance Manual 5 Self-Diagnosis Mode

5-27

Horizontal nozzle alignment check (CW direction): Prints the patterns in the order of A to H.

Horizontal nozzle alignment check (CCW direction): Prints the patterns in the order of A to H.

4. If any abnormal conditions are found in the ink discharge status of the head nozzles, perform cleaning.

TIP

"5.5.15 Feed Pitch Check Menu" p.5-46

5. After cleaning, make the machine print out head nozzle check patterns again.

Media set

Finish media initialization

Finish printing

If media is not set

Display during adjustment printing

Previous menu

Next menu

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Technical Bulletin

tib 1006-001

RJ-900 Print Head Alignment

7 Adjustment RJ-901C/RJ-900C Maintenance Manual

7-26

7.7 Head Alignment Adjustment(Horizontal Height)

This section describes the procedure to adjust the head slant in horizontal direction.

When you have removed and installed the head assembly, such as for head assembly replacement, always

adjust the head slant and depth following the steps below.

NOTE

Before starting adjustment, remove the following parts.

• CR board cover: "4.6.1 Replacing Print Head" p.4-37

• Cable cover R: "4.6.1 Replacing Print Head" p.4-37

1. Start the system in self-diagnosis function mode and print the adjustment patterns in "Head Slant Check

Menu 1".

"5.5.4 Head Slant Check Menu 1" p.5-28

2. Make adjustment based on the printed adjustment patterns.

A: Check the slant at this point.

B: Media feed direction

C: OK

D: Move the head adjusting cam upward.

E: Move the head adjusting cam downward.

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RJ-901C/RJ-900C Maintenance Manual 7 Adjustment

7-27

3. Move the head adjusting cam lever to adjust head slant.

No. Part name

1Head adjusting cam

2Head mounting plate

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Technical Bulletin

tib 1006-001

RJ-900 Print Head Alignment

7 Adjustment RJ-901C/RJ-900C Maintenance Manual

7-28

7.8 Head Alignment Adjustment(Slant)

This section describes the procedure to adjust the head slant in vertical direction.

After operation such as head assembly replacement, adjust the head slant according to the steps below.

NOTE

Before starting adjustment, remove the following parts.

• CR board cover: "4.6.1 Replacing Print Head" p.4-37

• Cable cover R: "4.6.1 Replacing Print Head" p.4-37

1. Start the system in self-diagnosis function mode and print the adjustment patterns in "Head Slant Check

Menu 2".

"5.5.5 Head Slant Check Menu 2" p.5-29

2. Make adjustment based on the printed adjustment patterns.

A: Check the point to check the vertical slant angle.

B: Media feed direction

C: OK

D: Move the vertical-slant adjusting tab to the right.

E: Move the vertical-slant adjusting tab to the left.

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Technical Bulletin

tib 1006-001

RJ-900 Print Head Alignment

RJ-901C/RJ-900C Maintenance Manual 7 Adjustment

7-29

3. Loosen the vertical-slant adjusting tab screw and move the tab left and right to adjust the head vertical

angle.

7.9 Cutter Holder Height Adjustment

This section describes the procedure to adjust the cutter holder height.

7.9.1 Jigs and Tools

The following jigs and tools are required for cutter holder height adjustment.

• Cutter holder height adjusting jig

TIP

"10.4 Jigs and Tools" p.10-7

7.9.2 Adjustment Procedure

To make adjustment, follow the steps below.

NOTE

Before starting adjustment, remove the following parts.

• CR cover: Step 2 to 4 in "4.6.1 Replacing Print Head" p.4-37

• Cutter blade: Operation manual

No. Part name

1Vertical-slant adjusting tab

2Vertical-slant adjusting tab

screw

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Technical Bulletin

tib 1006-001

RJ-900 Print Head Alignment

RJ-901C/RJ-900C Maintenance Manual 5 Self-Diagnosis Mode

5-31

5.5.6 CW Adjustment

This menu is used to adjust the gap of the print positions caused by CR passes.

To adjust the gap of it, at first print out Uni-D printing and confirm the differences of print position. Then,

enter the difference for the relevant parameters.

Adjustment items are shown in the tables below.

The actual procedure is as follows.

1. Set media as necessary.

2. After media is set, the machine prints out CW adjustment check patterns.

Table 5-6 Uni-D Menu Items

Item Contents

CW adjustment Low 1 CW adjustment for low head height, PG 1 value, using 3-peak waveform

CW adjustment Low 2 CW adjustment for low head height, PG 1 value, using 6-peak waveform

CW adjustment High 1 CW adjustment for high head height, PG 2 value, using 3-peak waveform

CW adjustment High 2 CW adjustment for high head height, PG 2 value, using 6-peak waveform

Table 5-7 Uni-D Adjustment Items

Item Contents

Gap1A-1B Uni-D (CW) adjustment of nozzle row B to nozzle row A

Gap1A-2A Uni-D (CW) adjustment of nozzle row C to nozzle row A

Gap1A-2B Uni-D (CW) adjustment of nozzle row D to nozzle row A

Gap1A-3A Uni-D (CW) adjustment of nozzle row E to nozzle row A

Gap1A-3B Uni-D (CW) adjustment of nozzle row F to nozzle row A

Gap1A-4A Uni-D (CW) adjustment of nozzle row G to nozzle row A

Gap1A-4B Uni-D (CW) adjustment of nozzle row H to nozzle row A

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