TIB085_RHII-FII_Head Adjustments.pdf

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TIB085 RHII&FII Head Adjustments.doc Pag. 1

TECHNICAL INFORMATION BULLETINRelease date : May 11 th , 2004

Bul letin N 2004/085

FOR: MUTOH AUTHORIZED RESELLERS ONLYFROM: MUTOH service & support department.

Rockhopper II and Falcon II:Head Adjustment

Dear Customer,

This technical information bulletin explains how to perform a head adjustment correctly.

In previous Technical Information Bulletin number TIB 078, we have explained that since firmware version1.14 of the Falcon II and 2.06 of the Rockhopper II, the reference of the front/back adjustment of an 8 headprinter has been changed. This to improve the head alignment procedure.

In this Technical Information Bulletin, to avoid every misunderstanding, we not only make a distinctionbetween a 4 head and 8 head machine, but also between the different colour combinations (1x6 and 2x4).

The head adjustment consists out of 3 checks.

* HeadSlant *F1 Slant F&B F2F3 Check End F4

Perform these adjustments in the following order:

1) Head slant adjustment2) Front and back adjustment3) Check

1. HEAD PRECISION ADJUSTMENT (SLANT)

This section explains the procedure for adjusting the head angle.When replacing the head assembly, use the following procedure to adjust the head angle and headforward/rear position.


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1.1. Head slant adjustment

1.1.1 For a 4 head printer

Step 1 : Start the self-diagnostic function.

Notes :

Refer to Self-Diagnosis Function

Step 2 : Select "Adj: HeadSlant".

Step 3 : Print "Slant" pattern.If the dotted lines on pattern CW and CCW are not a straight line, which you can check with amagnifying glass (enlargement factor of at least 10), please go to step 4.

Notes :

When the printing pattern is printed, you will only see lines, and no notifications of inkchannels. The head sequence shown below.

4 head model: 1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B

Step 4 : Loosen the screw (with one turn) fixing the head stationary plate.

1 = Screw (M2.5x5) fixing the head stationary plate 2 = Angle adjustment screw3 = Front and back adjustment screw

Step 5 : Make adjustments until the values of CW and CCW offset are identical.

Notes :

In theory, the alignment of CW and CCW should be identical. But in practice, it isalmost impossible to obtain a perfect alignment. When there is a slight differencebetween CW and CCW, be sure the heads are well seated.

In case you only print uni directional, adjust the CW till it is aligned perfectly.

In case you print bi-directional and CW and CCW cannot be aligned more perfectly,divide the slant error equally.


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Notes :

When printing the pattern, the head identifications 1A, 1B etc, are not printed. Analyse the pattern as shown below. Be sure to have five lines for each color.

Before adjustment Adjusted head slant

No. Part1 Angle adjustment screw

Step 6 : Tighten the screw fixing the head stationary plate.

Repeat step 1 to 6 until the adjustment is correct for all heads.


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1.1.2 For an 8 head printer


Notes :

Refer to Self-Diagnosis Function

Step 2 : Select "Adj: HeadSlant".

Step 3 : Print "Slant" pattern.

If the dotted lines on pattern CW and CCW are not a straight line, which you can check with amagnifying glass (enlargement factor of at least 10), please go to step 4.

Notes :

When the printing pattern is printed, you will only see lines, and no notifications of inkchannels. The head sequence is as shown below.

8 head model: 3A, 3B, 1A, 1B, 2A, 2B, 4A, 4B, 5A, 5B, 6A, 6B, 7A, 7B, 8A, 8B

Step 4 : Loosen the screw (with one turn) fixing the head stationary plate.

1 = Screw (M2.5x5) fixing the head stationary plate 2 = Angle adjustment screw3 = Front and back adjustment screw

Step 5 : Make adjustments until amount of CW and CCW offset are identical.

Notes :

In theory, the alignment of CW and CCW should be identical. But in practice, it isalmost impossible to obtain a perfect alignment. When there is a slight differencebetween CW and CCW, be sure the heads are well seated.

In case you only print uni directional, adjust the CW till it is perfect aligned. In case you print bi-directional and CW and CCW cannot be aligned more perfectly,

divide the slant error equally.


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Notes :

When printing the pattern, the head identifications 1A, 1B etc, are not printed. Analyse the pattern as shown below. Be sure to have five lines for each color.

8B 8A 7B 7A 6B 6A 5B 5A 4B 4A 2B 2A 1B 1A 3B 3A

Before adjustment Adjust ed head slant

No. Part1 Angle adjustment screw

Step 6 : Tighten the screw fixing the head stationary plate.Repeat step 1 to 6 until the adjustment is correct for all heads.


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1.2. Front and back of head adjustment

1.2.1 For a 4 head printer

1.2.1.1 With a 2x4 configuration.

To perform a Head Front/Back Adjustment, please follow the steps mentioned below.

Step 1 : In diagnostic mode, go to [Adjust : Head Slant].

Step 2 : Press the [F2] key for F&B (front and back) adjustment.


Step 3 : Print out [Front/Back] pattern. First, pattern A with 1A as reference is printed, then pattern B with4B as reference and finally A+B.

A+B

B

4B is thereference head

A

1A is thereference head


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Notes :

To help you identify the print heads on the test pattern please refer to the diagrambelow.

Now you will see, 1A is Black, 1B is Yellow, etc

Step 4 : Check if all nozzles are in 1 row by using a magnifying glass with an enlargement factor of atleast 10.If this is not the case, please proceed to step 5.

Step 5 : Loosen the screw which secures the Head Fixing Plate with 1 turn

1 = Head Fixing plate securing screw 2 Front/Back Adjustment Screw


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Step 6 : When the nozzles are not in one row, adjust the head front/back position by moving the HeadFront/Back Adjustment Screw as shown below. First adjust nozzle row A (1A, 2A, 3A, 4A). When

adjusted perfectly, nozzle row B should automatically be adjusted. But in practice this isntalways a fact. When your determine a small misalignment after adjusting A well, readjust againuntil all nozzles of row A and B are perfectly aligned.

Step 7 : Tighten the screw which secures the Head Fixing Plate.

Step 8 : Repeat step 1 to 7 until the adjustment is correct.

1.2.1.2 With a 1x6 configuration

To perform a Head Front/Back Adjustment, please follow the steps mentioned below.

Step 1 : In diagnostic mode, go to [Adjust : Head Slant].

Step 2 : Press the [F2] key for F&B (front and back) adjustment.



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Step 3 : Print out [Front/Back] pattern. First, pattern A with 1A as reference is printed, then pattern B with

4B as reference and finally A+B.

Notes :

To help you identify the print heads on the test pattern please refer to the diagrambelow.

A+B

B

4B is thereference head

A

1A is the

reference head


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Now you will see, 1A is Black, 1B is Cyan, etc

Step 4 : Check if all nozzles are in 1 row by using a magnifying glass with an enlargement factor of atleast 10.If this is not the case, please proceed to step 5.

Step 5 : Loosen the screw which secures the Head Fixing Plate with 1 turn


Step 6 : When the nozzles are not in one row, adjust the head front/back position by moving the HeadFront/Back Adjustment Screw as shown below. First adjust nozzle row A (1A, 2A, 3A, 4A). Whenadjusted perfectly, nozzle row B should automatically be adjusted. But in practice this isntalways a fact. When your determine a small misalignment after adjusting A well, readjust againuntil all nozzles of row A and B are perfectly aligned.


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Now you can see, 1A is black. 1B is Y (follow the line till you reach the junction. Thengo up to Yellow

Step 4 : Check if all nozzles are in 1 row by using a magnifying glass with an enlargement factor of atleast 10.If not, please proceed to step 5.

Step 5 : Loosen the screw which secures the Head Fixing Plate with 1 turn.


Step 6 : When the nozzles are not in one row, adjust the head front/back position by moving the HeadFront/Back Adjustment Screw as shown below. First adjust nozzle row A (1A, 2A, 3A, 4A). Whenadjusted perfectly, nozzle row B should automatically be adjusted. But in practice this isntalways a fact. When your determine a small misalignment after adjusting A well, readjust again

until all nozzles of row A and B are perfectly aligned.


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Now you can see, 1A is black. 1B is LM (follow the line till you reach the junction. Thengo up to Light Magenta

Notes :

Note that since firmware version 1.14 of the Falcon II and firmware version 2.06 of theRockhopper II, the references has been changed and became 3B and 6A (line in red in

the box above). This to optimise the head alignment procedure.

Step 4 : Check if all nozzles are in 1 row by using a magnifying glass with an enlargement factor of atleast 10.If not, please proceed to step 5.

Step 5 : Loosen the screw which secures the Head Fixing Plate with 1 turn.

1 = Head Fixing plate securing screw 2 = Front/Back Adjustment Screw

Step 6 : When the nozzles are not in one row, adjust the head front/back position by moving the HeadFront/Back Adjustment Screw as shown below. First adjust nozzle row A (1A, 2A, 3A, 4A). Whenadjusted perfectly, nozzle row B should automatically be adjusted. But in practice this isntalways a fact. When your determine a small misalignment after adjusting A well, readjust againuntil all nozzles of row A and B are perfectly aligned.


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Notes :

Please note that you also have a third menu in head slant, namely the check menu.With this pattern, it is possible to compare every front and back position of everyhead to each other


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1.4 CW adjustments (Uni-Directional)

To perform CW adjustments, please follow the steps mentioned below.


Notes :

Refer to Self-Diagnosis Function".

Step 2 : Select "Adj:Uni-D".

Step 3 : Print a CW adjustment pattern.

Step 4 : The odd rows (alternately 1A and 1B) are the references. So the even rows (2A, 2B, 3A, 3B, 4 Aand 4B) should be adjusted (use a magnifying with an enlargement factor of at least 10)When you want to move the even rows (with dots) to the right, you have to increase (+) the value.For example: The value is 20, adjust it to 30 for example

The value is -20, adjust it to -10 for exampleWhen you want to move the even rows (with dots) to the left, you have to decrease (-) the value.For example: The value is 20, adjust it to 10 for example

The value is -20, adjust it to -30 for example

Notes :

For 87-inch specifications, the head 5-A, 5-B, 6-A, 6-B, 7-A, 7-B, 8-A, 8-B areadded.

In case not all nozzles are in one row, make adjustments until all nozzles in the areaaround the reference, lines up in a straight line.

Documents

TIB085_RHII-FII_Head Adjustments.pdf