MIMAKI TextileJet Tx2-1600 Series Operating instructions

MIMAKI ENGINEERING CO., LTD.
TKB Gotenyama Building, 5-9-41, Kitashinagawa, Shinagawa-ku, Tokyo 141-0001, Japan
Phone: [phone] Fax: [phone]
URL: http: // www.mimaki. co. jp
E-mail: traiding@mimaki. co. jp
MAINTENANCE MANUAL
Ver. 1.00
D500183

– i –
FOREWORD
This maintenance manual covers items required to be remembered to conduct maintenance works
for the Tx2-1600 series of color ink jet plotter in the field.
Maintenance works have to be carried out by servicemen who have learned disassembly, assembly
and adjustment techniques with required tools and measuring apparatues.
This manual covers existing maintenance parts. For any failure other than those described in this
manual, factory-repairs will be necessary.
Before reading this maintenance manual, read the following manual to learn basic operations of this
device.
• Operation Manual for Tx2-1600 Series (D200595).

– ii –
TABLE OF CONTENTS
CHAPTER 1 OVERVIEW OF MAINTENANCE
1-1. Cautions in maintenance .............................................................................1.2
1-2. How to use this maintenance manual.........................................................1.3
1-3. Tools required for maintenance works ...................................................... 1.3
1-4. Names of parts..............................................................................................1.4
1-4-1. Front face...............................................................................................1.4
1-4-2. Rear face ................................................................................................ 1.5
1-5. Specifications ................................................................................................ 1.6
1-6. Cloth Media Handling Notes ......................................................................1.9
CHAPTER 2 EXPLANATION OF OPERATION
2-1. Explanation of electrical components ........................................................2.2
2-1-1. Operations .............................................................................................2.2
2-1-2. Power supply ......................................................................................... 2.4
2-1-3. Main PCB ..............................................................................................2.4
2-1-4. 1394 PCB ..............................................................................................2.8
2-1-5. I/F Connection PCB ..............................................................................2.8
2-1-6. HDC-4Head PCB (x2) ..........................................................................2.8
2-1-7. IO PCB ................................................................................................2.10
2-1-8. Slider PCB ...........................................................................................2.11
2-1-9. Linear encoder PCB ............................................................................2.13
2-1-10.The KeyBoard PCB ............................................................................. 2.13
2-1-11 Ink Sensor PCB 1 ................................................................................2.13
2-1-12.Ink Sensor PCB 2 ................................................................................2.13
2-1-13.Take-up motor PCB ............................................................................ 2.13
2-1-14.Centering PCB.....................................................................................2.13
2-1-15.Centering Sensor PCB ......................................................................... 2.13
2-1-16.ID contact PCB....................................................................................2.13
2-2. Ink system ...................................................................................................2.14
2-2-1. Definitions ...........................................................................................2.14
2-2-2. Brief explanation of the ink system.....................................................2.15
2-2-3. Parameters related to the ink system ...................................................2.18
2-3. Brief explanation of media size detection control ................................... 2.19

– iii –
CHAPTER 3 TROUBLESHOOTING
3-1. Troubles for which error messages are given on the LCD ......................3.2
3-2. Error messages and corrective measures .................................................. 3.3
3-2-1.
Error messages for troubles for which error numbers are given on the LCD 3.3
3-2-2. Ink-related components and other components ..................................... 3.6
3-2-3. Warning Messages Regarding Fabric Transportation ...........................3.7
3-3. Troubles for which error messages are not given on the LCD ................ 3.8
3-3-1. The device will not be energized...........................................................3.8
3-3-2. The device fails to perform plotting ......................................................3.9
3-4. Plotting failure ...........................................................................................3.11
3-4-1. Abnormal nozzle discharge .................................................................3.11
3-4-2. Abnormal ink shot ...............................................................................3.11
3-4-3. Plotted drawing is out of position .......................................................3.12
3-4-4. Print is not sharp..................................................................................3.12
3-4-5. Abnormal print ....................................................................................3.13
3-4-6. Color of print is pale............................................................................3.14
3-4-7. Ink-filling cannot be performed ..........................................................3.14
3-4-8. Plotted dots or lines are dirty...............................................................3.15
3-4-9. Stripes are always drawn at the time of scanning ...............................3.16
3-4-10.Black and White Stripes appear from side to side .............................. 3.17
3-4-11.Dark and Light Images Occur at Each Scan ....................................... 3.17
3-4-12.The media feed amount is not equal on the right and left. .................. 3.18
CHAPTER 4 MAINTENANCE MODE
4-1. Maintenance items ....................................................................................... 4.2
4-2. Entering into the maintenance mode .........................................................4.3
4-2-1. Entering into the maintenance mode when actuating the plotter .......... 4.3
4-2-2. Entering into the maintenance mode by system parameters ................. 4.4
4-3. Menu of #ADJUST ...................................................................................... 4.5
4-3-1. PRINTadjust2 ........................................................................................4.5
4-3-2. HEAD ADJUST ................................................................................. 4.11
4-3-3. HEAD WASH ..................................................................................... 4.13
4-3-4. SELECT CLEANING ........................................................................ 4.15
4-3-5. REPLACE COUNTER ......................................................................4.17
4-3-6. DEFAULT SET...................................................................................4.19
4-3-7. CAPPING ............................................................................................4.20
4-3-8. INK SETUP.........................................................................................4.21
4-3-9. HEAD ID............................................................................................ 4.22
4-3-10.ADJUST EDGE .................................................................................4.23
4-3-11.500mm SQUARE ...............................................................................4.25

– iv –
4-3-12.SET QUALITY ..................................................................................4.27
4-3-13.MEDIA COMP2 ................................................................................4.28
4-4. #TEST items .............................................................................................. 4.30
4-4-1. CHECK PATTERN ........................................................................... 4.30
4-4-2. PARAMETER DRAW ....................................................................... 4.37
4-4-3. ALL PATTERN .................................................................................4.38
4-4-4. X SERVO ........................................................................................... 4.39
4-4-5. Y SERVO ........................................................................................... 4.40
4-4-6. XY SERVO ........................................................................................4.41
4-4-7. ACTION TEST ..................................................................................4.42
4-4-8. SENSOR TEST ..................................................................................4.43
4-4-9. KEYBOARD TEST ...........................................................................4.46
4-4-10.DISPLAY TEST ............................................................................... 4-47
4-4-11.LCD TEST ........................................................................................ 4-48
4-4-12.PUMP MOTOR................................................................................. 4-49
4-4-13.TIMER CHECK ................................................................................ 4-50
4-4-14.MEMORY CHECK .......................................................................... 4-51
4-4-15.SKEW CHECK ................................................................................. 4-55
4-4-16.TEMP CHECK .................................................................................. 4-56
4-4-17.ENCODER CHECK ..........................................................................4.57
4-5. #PARAMATER items ..............................................................................4.60
4-5-1. SYSTEM PARAMETER ................................................................... 4.60
4-5-2. INK PARAMETER 1........................................................................ 4.63
4-5-3. INK PARAMETER 2........................................................................ 4.63
4-5-4. MAINTENANCE PARAMETER ..................................................... 4.63
4-5-5. SERVO PARAMETER...................................................................... 4.63
4-5-6. ADJUSTMENT PARAMETER ........................................................ 4.63
4-5-7. INFORMATION PARAMETER ....................................................... 4.63
4-6. Uploading and Downloading Parameters ................................................ 4.64
4-6-1. UPLOAD (Plotter >>> Computer)..................................................... 4.64
4-6-2. DOWNLOAD (Computer >>> Plotter) .............................................4.65
4-7. Updating the firmware ..............................................................................4.67
4-7-1. The firmware in this unit .....................................................................4.67
4-7-2. Main unit side firmware version updating file ....................................4.67
4-7-3. Interface side firmware version updating file .....................................4.68
4-7-4. Checking the version updating file......................................................4.68
4-7-5. Updating procedure .............................................................................4.69
4-8. Maintenance menu tree .............................................................................4.71

– v –
CHAPTER 5 DISASSEMBLING / ASSEMBLING PROCEDURE
5-1. Disassembly and assembly .......................................................................... 5.2
5-1-1. Front cover assy., Y cover, SR cover, YR cover and Right cover ........5.2
5-1-2. F cover L/R, Platen cover, and Paper sensor R assy. ............................5.4
5-1-3. X-motor assy. ........................................................................................ 5.5
5-1-4. Paper feed roller (Do not disassemble) ................................................. 5.6
5-1-5. Keyboard assy. and IO PCB assy. .........................................................5.6
5-1-6. X slowdown belt (3 type), XM assy, X-pulley, Driving roller pulley,
X joint shaft pulley ................................................................................5.8
5-1-7. Friction roller.......................................................................................5.10
5-1-8. Y-motor assy., S3M belt 160, Clean toothed belt ...............................5.11
5-1-9. Head cover, Slider PCB and Linear encoder PCB assy. / scale ..........5.12
5-1-10.Print head............................................................................................. 5.14
5-1-11.Main FPC cable assy. .......................................................................... 5.16
5-1-12.Cloth width sensor PCB assy. ............................................................. 5.18
5-1-13.Cap assy............................................................................................... 5.19
5-1-14.Station sensor assy., Capping sensor assy. and Wipersensor assy. ..... 5.20
5-1-15.Ink supply tube (inside diameter: ø2mm) ........................................... 5.22
5-1-16.IEEE1394 PCB, Main PCB, HDC-1 PCB assy., HDC-2 PCB assy.
and Power PCB ...................................................................................5.23
5-1-17.Centering motor assy. .......................................................................... 5.25
5-1-18.ID contact PCB assy, Cartridge sensor, I/C, Y ................................... 5.26
CHAPTER 6 ADJUSTMENT
6-1. Adjusting item list ........................................................................................6.2
6-2. Adjusting item ..............................................................................................6.3
6-2-1. Adjustment of the station position ........................................................ 6.3
6-2-2. Adjustment of the Linear sensor PCB assy height ................................6.8
6-2-3. Adjustment of the Y-motor belt tension ................................................6.9
6-2-4. Adjustment of the X-motor belt tension ..............................................6.10
6-2-5. Adjustment of the head (head angle / head stagger) ...........................6.11
6-2-6. Adjustment of the X slowdown belt (100 S3M 459) .......................... 6.15
6-2-7. Adjustment of the X slowdown belt (100 S3M 243) .......................... 6.16
6-2-8. Adjustment of the Friction roller position ...........................................6.17
6-2-9. Adjustment of the Right and left edge position...................................6.18
6-2-10.Adjustment of Take-up device, Torque limiter
and the Feed torque limiter ................................................................. 6.19

– vi –

– 1.1 –
CHAPTER 1
OVERVIEW OF MAINTENANCE

– 1.2 –
1-1. Cautions in maintenance
Following cautions have to be taken when conducting maintenance works.
•Be sure to fully understand precautions given in “For safe operation” in the Instruction Manual
for the Tx2-1600 series.
• Be sure to accurately grasp problems since misoperation can be the cause of the problem.
• Be sure to secure a sufficient space for maintenance.
• Be sure to turn off the power switch and disconnect the power plug from the receptacle.
•In the case where it is necessary to conduct test with the electrical box cover opened, caution
should be taken to avoid electric shock hazards in the electrical box.
•In the case where it is necessary to conduct maintenance works with the power on, carefully
observe the movement of the head. (Keep any part of your body away from the moving parts.)
•Shift the paper (in the X-direction) and the head (in the Y-direction) using the jog keys. If it is
necessary to shift the paper and the head by hand with the power turned off, exercise care to
shift them slowly.
•Do not tilt the plotter with the ink cartridges filled with ink. Doing so can give rise to leakage
of ink. (In particular, do not position the plotter in such a way, when ascending/descending the
stairs, that the maintenance station is lower than the ink station.)
In principle, the following procedure should be taken in prior to the transportation.
1) Discharge ink from the tube in accordance with the description given under “Discharge
cleaning” in the maintenance tests.
2) Detach the waste ink hose.
3) Fix the head with the head stopper (s Stopper).
•If the main unit is removed from the legs and placed directly on the floor, be careful of the
following points.
• Unplug the takeup unit power cord.
•Remove the waste ink hose. (To prevent ink leakage, plug the joint with a cloth.)
CAUTION
• Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the manufacture.
Dispose of used batteries according to the manufacturer's instructions.
•Do not get ink drops on the FPC or connectors when connecting or disconnecting the damper.
Doing so may cause short-circuit or inferior contact resulting in abnormal ink discharge. Be
careful when handling ink.
•Properly and carefully connect the FPC cable of the slider PCB from the HDC PCB according
to the connector number. Failure to do so may cause short-circuit of the power supply.
• Do not turn the power off during firmware upgrading. Doing so may disable restarting.

– 1.3 –
1-2. How to use this maintenance manual
Use the maintenance manual in the following manner.
•Check first a phenomenon that is arising to grasp the trouble.
•Secondly, grasp the outline of the trouble while referring to error messages given in Chapter 3.
• Refer to Chapter 6 for performance checking procedure and adjusting procedure.
1-3. Tools required for maintenance works
Tools and measuring apparatus required for maintenance works are given below.
Name Q’ty Remarks
Phillips screwdriver, type 1 1 For M2
Phillips screwdriver, type 2 1 For M3 to M5 (L=260 or more)
Phillips screwdriver, type 2 1 For M3 to M5
Slotted screwdriver 1 Log side 2.5 mm for drawing out E-rings
Hexagon wrench key 1 1.5 mm for M3 SSWP
12.0 mm for M4 SSWP
12.5 mm for M3 cap bolts
16.0 mm for M8 cap bolts
Wrench 1 Opposite side 5 mm
1 Opposite side 5.5 mm for M3 nuts
1 Opposite side 7 mm for M4 nuts
Tweezers 1 To prevent the cable from being pulled when
disconnecting the connector
Long-nose pliers 1
Nippers 1
Soldering iron 1
Scale 1 500 mm, 150 mm
Bar-type tension gauge 1 For 500 gf
Tester 1 If necessary
Magnifier 1 Magnification of approx. 50 to 60
Adhesive agent 1 LOCKTITE242 (for locking screws)
Gloves 1 In prevention of stains and safeguarding
Insulation lock As required L=150 or less (UL-approved product)
Nitroflon tape or acetate fabric tape As required UL-approved product
Solder As required

– 1.4 –
1-4. Names of parts
1-4-1. Front face
Name Function
1Front cover It is opened when setting medium or taking a corrective measure against
a medium jam.
2Power switch It turns on/off the power to the device.
3IEEE-1394 connector A 400M bps interface connector compatible with IEEE-1394.
4Parallel connector Bi-directional parallel interface connector (complies with IEEE1284)
5AC inlet The power cable is connected to the AC inlet.
6Operation panel This panel has the operation keys required for operating the device
and the LCD for displaying set items, etc.
7Maintenance cover This is the carriage cover. During maintenance of the station, open it by
loosening the screws.
8Waste ink hose This hose drains waste ink. The device requires two drain hoses.
9Stand It supports the main unit. It is provided with casters that are used to
move the device.
10 Medium cover This cover prevents the take-up device from catching a slack cloth.
11 Take-up device It supports to wind up the roll medium printed, and have the operation
named FORWARD / OFF / REVERSE.
12 Clamp lever It is made to go up-down the pinch roller for holding medium.
13 Platen It puts out the medium as it is plotted on.
14 Take-up auxiliary bar This shaft guides a cloth after plotting to the take-up device.

– 1.5 –
1-4-2. Rear face
Name Function
1Fink station This station houses up to eight ink cartridges.
2Clamp lever It is made to go up-down the pinch roller for holding medium.
3Centering sensor unit This sensor detects the fabric edge and optical axis so that the fabric be
fed straight.
4Feeding unit Inserted into both ends of the fabric core to retain the roll fabric.
5Roll holder Applicable to roll paper with a thickness of 1.35, 2, or 3 inches.
6Feeding auxiliary bar This shaft supports the feeding fabric while it is fed to the platen.
7Rink station This station houses up to eight ink cartridges.
8Ink cartridge Each cartridge contains ink of a specific color.

– 1.6 –
1-5. Specifications
Item Tx2-1600 Remarks
Printing head Method Piezo-electric drop-on demand
Specification Eight-heads (4 x 2 lines)
Nozzle High speed plotting : 360 nozzles for each color
Printing speed Two independent plotting : 180 nozzles for each color
Resolution 360, 540, 720 dpi
Drawing mode Resolution
360 x 360 dpi : 2 / 4 / 8 passes, Unidirection / bidirection
Pass 360 x 540 dpi : 3 / 6 / 12 passes, Unidirection / bidirection
Printing direction 360 x 720 dpi :4 / 8 / 16passes, Unidirection / bidirection
720 x 720 dpi : 4 / 8 / 16 passes, Unidirection / bidirection
Ink type Acid dye ink Color (Gray, Black, Cyan, Magenta, Yellow, Light
Color Cyan, Light Magenta, Blue)
Disperse dye ink Color (Gray, Black, Cyan, Magenta, Yellow, Light
Cyan, Light Magenta, Blue, Light Blue)
Reactive dye ink Color (Released soon.)
Delivery system of ink Proprietary system with low ink detection sensor
Capacity of ink cartrige 220 cc ±5 cc per cartrige
Fabric type The following cloths are excluded.
• Cloths which become elastic with water
• Cloths with high elasticity
• Curled or folded cloths
• Cloths with a low firing point (when the optional
drying unit is used)
Max. Printing width Width 1620 mm
Medium size Thickness 7.0 mm or less
(Roll medium) Roll outside diameter Ø 180 mm or less
Roll weight 15 Kg or less
Roll inside diameter 1.35 Inch, 2 Inch, 3 Inch
Plotting surface Plotting can be made on either side.
Roll end treatment Light-adhesive tape is used to allow the paper to be
removed from the core with ease.
Margin Roll medium Left end and Right end : 10 mm ±0.5 mm
Distance accuracy Absolute accuracy Whichever the larger one of ±0.5 mm or ±0.3 % of
the designated
Reoroducibility Whichever the larger one of ±0.5 mm or ±0.3 % of
the designated
Perpendecularity ±0.5 mm / 1000 mm
Medium skew 5 mm or less / 10 m variable
Head height adjustment 1.1 mm to 10 mm variable from the platen surface
Cutting of medium No cutter function
Medium delivery Take-up device as standerd (Outside winding)
Waste ink hose No waste ink tank
Interface IEEE1394 (Max.transmission rate 400 M bps)
Command MRL-I (ESC/PV.1 base)
Noise during standby Less than 56 dB
Noise during continuous printing Less than 66 dB
Noise during discontinuous printing Less than 70 dB
Safety Standard FCC ClassA

– 1.7 –
Item Tx2-1600 Remarks
Power AC100 V - 240 V 120W or less
Power consumption 450 W or less
Recomended Temperature 15 °C to 30 °C
Enviroment Humidity 35 to 65 % Rh (No condensation)
Temperature change ±10 °C / h or less
Dust Equivalent to normal office level
Outside dimensions (mm) 2750 x 780 x 1350
(W) x (D) x (H)
Weight Main unit 210 kg
Packing box Less than 250 kg

– 1.8 –
Plotting speed (Measurement after nozzle disabling)
Resolution Drawing mode Plotting time
Y x X dpi Setting pass High speed plotting Two independent plotting
Speed 2 1 minutes 54 second 3minutes 11 seconds
360 x 360 Standard 4 3 minutes 24 seconds 6minutes 01 seconds
Fine 8 6 minutes 21 seconds 11 minutes 30 seconds
Speed 3 2 minutes 40 seconds 4minutes 42 seconds
360 x 540 Standard 6 4 minutes 58 seconds 9minutes 12 seconds
Fine 12 9 minutes 32 seconds 17 minutes 54 seconds
Speed 4 3 minutes 14 seconds 6minutes 01 seconds
360 x 720 Standard 8 6 minutes 21 seconds 11 minutes 35 seconds
(Extended) Fine 16 12 minutes 30 seconds 24 minutes 16 seconds
Speed 8 5 minutes 33 seconds 11 minutes 05 seconds
720 x 720 Standard 8 9 minutes 37 seconds 19 minutes 28 seconds
Fine 16 19 minutes 07 seconds 34 minutes 45 seconds
•The above table gives printing time data in each operation mode and is not intended
to ensure plotting quality in each operation mode.
Tx2-1600 specified ink
No. Ink Type The number of color
1Acid dye ink (SPC-0268∗)8
2Disperse dye ink (SPC-0269∗)9
3Reactive dye ink (SPC-0270∗)11
Media for checking the plotting quality
The glossy white PET (SPC-0111 or SPC-0260) supplied from Mimaki Engineering
shall be used for adjustment and inspection.
Bi-directional printing
(Measurement on 1m2: 1600 x 625mm printing)

– 1.9 –
Handling Notes Effects and influences
Cloth setting 1
2
3
4
5
Winding 1
2
Plotting 1
2
1-6. Cloth Media Handling Notes
Pull out the cloth once to the front and then roll
by holding the roll holder or paper tube.
If the cloth is stretched on the right and left,
hardened by gumming, thick, or folded, release
the pinch roller at the faulty area.
Band stripe output in plotting differs when the
end of the cloth has exceeded the friction roller
and when it has reached the take-up device.
Start plotting after the end of the cloth reaches
the take-up device or is set on the take-up paper
tube.
Use the platen board if the ink does not pen
etrates through the cloth.
The head gap becomes relatively large where
the cloth plotting area is drooping, and produces
a black line where it is not.
A narrow rolled cloth had better be rolled
inward and outward repeatedly for straightening
before setting.
For winding, use the interval method and avoid
the continuous (tension) method.
Since the interval method does not apply
tension, a cloth cannot be wound tight. Conse-
quently, a 46-meter cloth may not be wound.
A very elastic cloth (ex. Lycra or Spandex)
cannot be used. This should be explained to the
user in advance.
Wetting shrinks a cloth and the right and left
edges are stepped.
This corrects the cloth not fed straight or equally
tense at the left and right centers.
This prevents wrinkling behind the pinch roller.
Tension at the cloth plotting area is determined
by the friction roller tension and the self weight
of the drooping cloth. This tension should be
made almost constant.
If you take the drooping cloth during plotting,
you can check its influence at the plotting line.
(A line appears.)
The platen board prevents the cloth from
drooping from the plotting area by the self
weight (+ ink weight).
If “Media correction” is adjusted to where the
cloth is not drooping:
1)A black line appears at a dropping place.
2)A white line appears at a non-drooping
place.
A narrow rolled cloth may become askew
greatly because the cloth is projecting outward.
In the continuous method, if the winding
diameter becomes large, the winding torque is
lost due to its own load and the tension on the
cloth decreases.If constant tension is lost, a
band stripe appears.
Loose winding causes the cloth to interfere
with the nearby shaft early.
An elastic cloth is stretched at the friction
roller and starts slipping when stretched to
certain extent. This makes the feed rate not
constant.
A plotted band shrinks and its end does not
match that of the next band.

– 1.10 –
Handling Notes Effects and influences
3
4
5
Other 1
As to the first cloth (including preprocess-
ing), make solid plotting first to see whether
the cloth becomes stepped at the right and
left edges or wavy at the border between the
solid plotting area and the non-plotting area.
White and black lines appear easily where
the areas of greatly different printing ratios
are not entangled but adjacent to each other
with clear borders. (Feed correction is not
possible.)
The feed correction value is 0.8 mm (4 paths)
or 0.4 mm (8 paths) per count. If a 20 mm
white line appears in 8-path plotting, enter -
50 as the correction value. (Reference value)
Vertical creases tend to appear at the pinch
roller section (arm between the pinch
rollers).
A weak preprocessed cloth is subject to this
problem.
A wet-shrinkable cloth often becomes stepped at
the right and left edges or wavy at the border
between the solid plotting area and the non-
plotting area.
If the platen board is not used for an ink-
penetrating cloth, the cloth droops due to the ink
weight where the printing ratio is high. A wet-
shrinkable cloth shrinks especially where the
printing ratio is high.
The note at left is for a film that extends and
contracts.
"Trial and error" is necessary in the end.
Since the friction roller applies tension, the cloth
is pulled with no resistance where there are no
pinch rollers.

CHAPTER 2
EXPLANATION OF OPERATION

– 2.2 –
2-1. Explanation of electrical components
2-1-1. Operations
*The slider of theTx2-1600 is provided with eight heads with stagger arrangement, with 180 nozzles (at
180dpi intervals) x 2 rows (2 colors) for each head.
* The ink in the ink chamber is discharged by vibrating the piezo-electric element of the head. The JV4
uses four different vibration waveform modes: the V1 (Variable1) mode which enables four gradations
(without L, M, and S) with 360 dpi resolution, the V2 (Variable2) mode which enables four gradations
with smaller dots with 720 dpi resolution, the N1 (Normal1) mode which enables high-speed two
gradations (1.0) with 360 dpi resolution, and the N2 (Normal2) mode which enables high-speed two
gradations with 720 dpi resolution.
However, note that the Normal waveform modes are not used when normal data is received from the
host PC. (Some Variable waveforms are represented in two gradations.)
Since the driving frequency (or the scanning speed of the head) depends on each waveform, Y-directional
position adjustment is required for each waveform.
* The HDC-4Head PCB is provided with two FPGAs (HDCs) which generate the driving signal (COM
waveform) to be applied to the piezo-electric element of one nozzle row for two heads, and the HDC-
2Head PCB is provided with one FPGA (HDC). The COM waveform is applied in synchronization with
the scale interval of each linear scale and, at the same time, the nozzle data is transferred to the head. Y-
directional position adjustment can be made in units of one dot or less by adjusting the timing of the
COM waveform for each nozzle row.
Since the ink discharge performance depends on each head, the COM waveform is corrected automatically
based on the head ID registered and the ambient temperature detected. (If the head ID is not registered
correctly, no ink may be discharged.)
* The main PCB is provided with the FPGA (PDC) in charge of image processing to which the 256MB
DSRAM picture memory (PRAM) is connected. As for the data output from the host PC, the command
is analyzed by the CPU and the image is transferred to the memory through high-speed DMA. Since the
PRAM has the ring memory configuration, head scanning is started when data for each scanning has
been stored. Since only an image with 180 dpi resolution can be formed into the X direction in each
scanning, the image with the target resolution is completed while making required amount of paper
feed.
* Stepping motors, sensors, and many other IO devices are connected to the Tx2-1600. Therefore, if all of
them are connected directly to the main PCB, it becomes difficult to handle wires and replace the PCB.
To avoid this, the number of signals has been reduced through serial signal transmission with the main
PCB using IO PCBs and ink sensor PCBs. This signal processing is performed by the FPGA (IOC)
mounted on the main PCB.
Scanning direction
180 dpi interval
Head nozzle arrangement
(viewed from rear side)

A#180




A#2
A#1
B#180




B#2
B#1
Paper feed
direction