MIMAKI JV22-130 User manual

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: [email protected]
MAINTENANCE MANUAL
Ver. 1.00
D500238
COLOR INKJET PLOTTER
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FOREWORD
This maintenance manual covers items required to be remembered to conduct maintenance works
for the JV22 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 apparatus.
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.
• Setup Guide for JV22 (D201034).
• Operation Manual for JV22 (D201031).
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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
CHAPTER 2 EXPLANATION OF OPERATION
2-1. Explanation of electrical components .................................................................. 2.2
2-1-1. Operations ........................................................................................................... 2.2
2-1-2. Power supply ...................................................................................................... 2.3
2-1-3. Main PCB ........................................................................................................... 2.3
2-1-4. 1394 PCB ............................................................................................................ 2.7
2-1-5. I/F Connection PCB ........................................................................................... 2.7
2-1-6. IO PCB................................................................................................................ 2.8
2-1-7. Slider PCB .......................................................................................................... 2.9
2-1-8. Linear encoder PCB ......................................................................................... 2.10
2-1-9. The Keyboard PCB........................................................................................... 2.10
2-1-10. Take-up motor PCB ......................................................................................... 2.10
2-2. Ink system............................................................................................................. 2.11
2-2-1. Definitions ........................................................................................................ 2.11
2-2-2. Brief explanation of the ink system ................................................................. 2.12
2-2-3. Parameters related to the ink system ................................................................ 2.15
2-3. Brief explanation of media size detection control ............................................ 2.16
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
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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
3-3-3. Cutting failure ................................................................................................... 3.10
3-3-4. Faulty cutter ...................................................................................................... 3.11
3-3-5. Abnormal vacuum fan ...................................................................................... 3.12
3-3-6. Abnormal nozzle discharge .............................................................................. 3.12
3-3-7. Abnormal ink shot ............................................................................................ 3.13
3-3-8. Ink-filling cannot be performed ....................................................................... 3.13
3-3-9. Abnormal wiper operation ............................................................................... 3.14
3-4. Plotting failure ..................................................................................................... 3.15
3-4-1. Print is not sharp ............................................................................................... 3.15
3-4-2. Abnormal print ................................................................................................. 3.16
3-4-3. Color of print is pale ......................................................................................... 3.17
3-4-4. Plotted drawing is out of position .................................................................... 3.17
3-4-5. Plotted dots or lines are dirty ........................................................................... 3.18
3-4-6. Stripes are always drawn at the time of scanning ............................................ 3.19
3-4-7. Black and White Stripes appear from side to side ........................................... 3.20
3-4-8. Dark and Light Images Occur at Each Scan .................................................... 3.21
3-4-9. Unstable heater temperature .............................................................................. 3.22
3-4-10. Ink drop or mist ............................................................................................... 3.22
CHAPTER 4 ADJUSTMENT
4-1. Maintenance Flow by Replacement Parts........................................................... 4.3
4-2. Maintenance item .................................................................................................. 4.4
4-2-1. Adjustment of the X-motor coupling ................................................................. 4.4
4-2-2. Replacement Print head unit .............................................................................. 4.5
4-2-3. Replacement Print head assy .............................................................................. 4.8
4-2-4. Adjustment of the head angle ............................................................................. 4.9
4-2-5. Adjustment of the head unit ............................................................................. 4.11
4-2-6. Replacement of pump assy and cap slider assy ............................................... 4.12
4-2-7. Changing the head height (High/Low range) ................................................... 4.13
4-2-8. Adjustment of the station height ...................................................................... 4.14
4-2-9. Adjustment of the cutter height ........................................................................ 4.18
4-2-10. Adjustment of the Head sensor height ........................................................... 4.19
4-2-11. Adjustment of the Linear sensor PCB assy height ........................................ 4.20
4-2-12. Adjustment of the Y-motor belt tension ........................................................ 4.21
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CHAPTER 5 MAINTENANCE MODE
5-1. Maintenance items ................................................................................................. 5.2
5-2. Entering into the maintenance mode................................................................... 5.3
5-2-1. Entering into the maintenance mode when actuating the plotter....................... 5.3
5-2-2. Entering into the maintenance mode by system parameters .............................. 5.4
5-3. Menu of #ADJUST ................................................................................................ 5.5
5-3-1. PRINTadjust2 ..................................................................................................... 5.5
1. Y Base ........................................................................................................................ 5.8
2. Y Single (Y Repeat, Y Bi-Directional) ...................................................................... 5.9
3. FINE Y Si. (FINE Y Re., FINE Y Bi.) ................................................................... 5.10
4. X DIRECTION......................................................................................................... 5.11
5-3-2. HEAD ADJUST .............................................................................................. 5.12
5-3-3. WASH............................................................................................................... 5.13
5-3-4. REPLACE COUNTER ................................................................................... 5.15
5-3-5. DEFAULT SET ................................................................................................ 5.17
5-3-6. CAPPING ......................................................................................................... 5.18
5-3-7. HEAD HEIGHT ............................................................................................... 5.19
5-3-8. INK SETUP ...................................................................................................... 5.20
5-3-9. HEAD ID ......................................................................................................... 5.21
5-3-10. MOTOR CURRENT ...................................................................................... 5.22
5-3-11. SERIAL NO. .................................................................................................. 5.23
5-3-12. DEALER NO. ................................................................................................. 5.24
5-3-13. WORM WHEEL ............................................................................................ 5.25
5-3-14. ADJUST EDGE ............................................................................................. 5.26
5-3-15. 500mmSQUARE ............................................................................................ 5.28
5-3-16. SET QUALITY .............................................................................................. 5.30
5-3-17. MEDIA COMP2 ............................................................................................. 5.31
5-4. #TEST items ........................................................................................................ 5.33
5-4-1. CHECK PATTERN .......................................................................................... 5.33
PATTERN : NOZZLE ................................................................................................ 5.35
5-4-2. PARAMETER DRAW ..................................................................................... 5.40
5-4-3. ALL PATTERN ............................................................................................... 5.41
5-4-4. X SERVO ........................................................................................................ 5.42
5-4-5. Y SERVO ........................................................................................................ 5.43
5-4-6. XY SERVO ..................................................................................................... 5.44
5-4-8. ACTION TEST................................................................................................ 5.45
5-4-9. SENSOR TEST ............................................................................................... 5.46
5-4-10. PAPER SENSOR ........................................................................................... 5.48
5-4-11. KEYBOARD TEST ....................................................................................... 5.49
5-4-12. LCD TEST ..................................................................................................... 5.50
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5-4-13. PUMP MOTOR ............................................................................................ 5-51
5-4-14. TIMER CHECK ............................................................................................ 5-52
5-4-15. MEMORY CHECK ....................................................................................... 5-53
5-4-16. SKEW CHECK ............................................................................................. 5-57
5-4-17. TEMP CHECK .............................................................................................. 5-58
5-4-18. ENCODER CHECK ...................................................................................... 5-59
5-5. #PARAMETER items ........................................................................................ 5.61
5-5-1. SYSTEM PARAMETER ................................................................................. 5.61
5-5-2. INK PARAMETER 1 ....................................................................................... 5.64
5-5-3. INK PARAMETER 2 ....................................................................................... 5.64
5-5-4. INK PARAMETER 3 ....................................................................................... 5.64
5-5-5. INK PARAMETER 4 ....................................................................................... 5.64
5-5-6. INK PARAMETER 5 ....................................................................................... 5.64
5-5-7. MAINTENANCE PARAMETER ................................................................... 5.64
5-5-8. CUSTOM PARAMETER ................................................................................ 5.64
5-5-9. SERVO PARAMETER .................................................................................... 5.64
5-5-10. ADJUSTMENT PARAMETER..................................................................... 5.64
5-6. Uploading and Downloading Parameters ......................................................... 5.65
5-6-1. UPLOAD (Plotter >>> Computer)................................................................... 5.65
5-6-2. DOWNLOAD (Computer >>> Plotter) ........................................................... 5.66
5-6-3.Error messages .................................................................................................... 5.66
5-7. Updating the firmware ........................................................................................ 5.67
5-7-1. The firmware in this unit .................................................................................. 5.67
5-7-2. Main unit side firmware version updating file ................................................. 5.67
5-7-3. Interface side firmware version updating file .................................................. 5.68
5-7-4. Checking the version updating file .................................................................. 5.68
5-7-5. Updating procedure .......................................................................................... 5.69
APPENDIX
6-1. Maintenance menu tree.................................................................................. APP. 2
6-2. Electrical component block diagram ............................................................ APP. 4
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– 1.1 –
CHAPTER 1
OVERVIEW OF MAINTENANCE
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1-1. Cautions in maintenance
WARNING
•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 main PCB
according to the connector number. Failure to do so may cause short-circuit of the
power supply.
•Properly and carefully connect each two cables between the head and the slider
PCB. In case switching the position by mistake, it may cause short-circuit of the
power supply.
•Do not turn the power off during firmware upgrading. Doing so may disable restarting.
Following cautions have to be taken when conducting maintenance works.
•Be sure to fully understand precautions given in “For safe operation” in the Operation Manual for the
JV22 series.
•Be sure to accurately grasp problems since miss operation 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 “WASH” in the
maintenance.
2) Detach the waste ink tank.
3) Fix the head with the head stopper.
•If the main unit is removed from the legs and placed directly on the floor, be careful of the following points.
•Unplug the take-up unit power cord.
•Remove the waste ink tank. (Plug the tube up with a cloth to prevent ink from spilling over.)
•Set up the roll holder and take-up device to the upper position.
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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.
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 (L=170)
15.5 mm for hexagon stud
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
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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. Even if the power switch is
off, keep the front cover closed to perform the ink clogging
preventive operation.
2Carriage Moves the print head from side to side.
3Operation panel This panel has the operation keys required for operating the
device and the LCD for displaying set items, etc.
4Capping station Incorporates the ink cap to be capped on the head and the
wiper, etc.
5Clamp lever It is made to go up-down the pinch roller for holding medium.
6Power switch It turns on/off the power to the device.
When the power switch is turned on, the POWER indicator
lights in green. While the main power switch is on, the ink
clogging preventive operation is performed periodically even if
the power switch is off. (Flashing)
7Waste ink tank Waste ink gathers in this tank.
8Stand It supports the main unit. It is provided with casters that are
used to move the device.
9Platen It puts out the medium as it is plotted on.
10 Maintenance cover It is opened when performing maintenance.
11 Take-up device It supports to wind up the roll medium printed.
12
3
4
5
6
7
8
9
10
11
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1-4-2. Rear face
Name Function
1Ink station Set the ink cartridges specified.
2Ink cartridge Each cartridge contains ink of a specific color.
3IEEE-1394 connector A 400M bps interface connector compatible with IEEE-1394.
4Parallel connector Bi-directional parallel interface connector (complies with IEEE1284)
5Paper roll setting bar This bar facilitates a paper roll to be set in position.
6Roll holder Roll holder is inserted in the right and left core of roll medium to
hold the roll medium. The roll holder is applicable to diameter of
medium cores with 2 and 3 inches. The attachment position
(height) of the roll holder can be set in three steps.
7AC inlet The power cable is connected to the AC inlet.
8Clamp lever Works together with the clamp lever on the font face of the device.
1
2
3
7
4
6
8
2
5
1
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1-5. Specifications
Item JV22-130 JV22-160
Printing head Method Piezo-electric drop-on demand
Specification 4-heads Inlines
Nozzle 360 nozzles / color (4 color set) : 180 nozzles / color (6 color set)
Resolution 360, 540, 720, 1440 dpi
Drawing mode 360 x 360 dpi : 2 / 4 / 8 passes, Unidirection / bidirection
360 x 540 dpi : 3 / 6 / 12 passes, Unidirection / bidirection
360 x 720 dpi : 4 / 8 / 16 passes, Unidirection / bidirection
720 x 720 dpi : 4 / 8 / 16 passes, Unidirection / bidirection
720 x 1440 dpi : 8 / 16 / 32 passes, Unidirection / bidirection
1440 x 1440 dpi : 16 / 32 passes, Unidirection / bidirection
Available ink type Exclusive water-based pigment ink
4 colors (B,C,M,Y) / 6 colors (B,C,M,Y,Lc,Lm) or (B,C,M,Y,G,O)
Delivery system of ink Supplies ink through a tube from ink cartridge
Remaining ink display function (No IC chip)
Ink end detecting function
Ink cartridge replacement system
Capacity of ink cartridge 220 cc ±5 cc per cartridge
About 200 cc for each cartridge variable
Media type Photopaper, Artificial paper, Mechanical film
Max. printing 1440 x 1440 dpi : 1000 mm
width Normal Scan 1361 mm 1610 mm
High-speed Scan 1321 mm 1570 mm
Roll Media Maximum 1371 mm 1620 mm
size Minimum 210 mm
Thickness 1.0 mm or less
Roll outside diameter Ø 180 mm or less
Roll weight 25 kg or less
Roll inside diameter 2 Inch, 3 Inch
Plotting surface Faces OUT
Roll end treatment Light-adhesive tape is used to allow the paper to be removed from the core
with ease.
Leaf medium Maximum 1371 mm 1620 mm
size Minimum 210 mm
Margin Leaf medium Left end and right end : 5 mm
Front : 65 mm
Rear : 110 mm
Margin Roll medium Left end and right end : 5 mm
Front : 25 mm
Rear : 0 mm
Distance Absolute accuracy Whichever the larger one of ±0.3 mm or ±0.3 % of the designated
accuracy Reproducibility Whichever the larger one of ±0.2 mm or ±0.1 % of the designated
Perpendicularity ±0.5 mm / 1000 mm
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Item JV22-130 JV22-160
Medium skew 5 mm or less / 10 m variable
Head height adjustment Lo range(1.5 mm / 2.5 mm) : Hi range(3.5 mm / 4.5 mm)
Cutting of medium Cutting of Y direction by the head cutter,
Cutting accuracy(steps) : 0.5mm or less.
Medium delivery Take-up device as standard (inside winding / outside winding selectable)
Waste ink tank Bottle type ( 2,000 cc [1pcs.])
Replacement timing is judged visually.
Interface IEEE1394 compliant, IEEE1284 compliant
Command MRL-II (ESC/PV.2 base, MIMAKI original command)
Noise during standby : Less than 58 dB (FAST-A, Front & Rear & Left & Right 1 m)
during continuous printing : Less than 65 dB
during discontinuous printing : Less than 70 dB
Safety Standard UL, VCCI-classA, FCC-classA, CEmarking, CBreport
Power AC 100 — 120 V±10%, AC 220 — 240 V±10%, 50/60 Hz ±1 Hz
Power consumption 300 VA or less
Recommended Available temp. 20 °C to 35 °C
Environment Humidity 35 to 65 % Rh (No condensation)
Guaranteed temp. 20 °C to 25 °C
Temperature change ±10 °C / h or less
Dust Equivalent to normal office level
Weight Main unit 130 kg 140 kg
Packing box Less than 148 kg Less than 158 kg
Outside Width 2400 mm 2660 mm
dimensions Depth Less than 640 mm
Height Less than 1240 mm
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Plotting speed
Normal print mode
4 color ink set 6 color ink set
Resolution Drawing mode Drawing mode
Y x X dpi Setting pass Setting pass
Speed 1 1 minutes 51 seconds Speed 2 3 minutes 58 seconds
360 x 360 Standard 2 2 minutes 51 seconds Standard 4 4 minutes 30 seconds
Fine 4 4 minutes 34 seconds Fine 8 7 minutes 51 seconds
Speed 3 5 minutes 28 seconds Speed 3 5 minutes 31 seconds
360 x 540 Standard 6 6 minutes 14 seconds Standard 6 6 minutes 30 seconds
Fine 12 11 minutes 28 seconds Fine 12 11 minutes 45 seconds
Speed 2 4 minutes 00 seconds Speed 4 7 minutes 17 seconds
360 x 720 Standard 4 4 minutes 35 seconds Standard 8 8 minutes 33 seconds
Fine 8 7 minutes 52 seconds Fine 16 14 minutes 38 seconds
Speed 2 5 minutes 29 seconds Speed 4 10 minutes 30 seconds
720 x 720 Standard 4 5 minutes 57 seconds Standard 8 11 minutes 34 seconds
Fine 8 10 minutes 42 seconds Fine 16 20 minutes 01 seconds
Speed 4 9 minutes 56 seconds Speed 8 20 minutes 27 seconds
720 x 1440 Standard 8 10 minutes 41 seconds Standard 16 22 minutes 08 seconds
Fine 16 20 minutes 17 seconds Fine 32 42 minutes 45 seconds
Speed 8 18 minutes 40 seconds Speed 16 43 minutes 16 seconds
1440 x 1440 Standard 8 18 minutes 40 seconds Standard 16 43 minutes 16 seconds
Fine 16 36 minutes 27 seconds Fine 32 85 minutes 19 seconds
High speed print mode at 360 x 540
The following print mode operates according to the RIP command. (The used RIP required
according the following print mode.)
4 color ink set
Resolution Drawing mode Bi-direction print Data resolution
Y x X dpi Y x X dpi
360 x 540 Hi-Speed 3pass / 2Layer 6 minutes 31 seconds 360 x 1080
(Measurement on 1m2: 1590 x 629 mm printing)
Bi-direction print Bi-direction print
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Print Resolution of JV22 series and Notes on specified media.
Resolution Notes / Limitations Media
360 x 360 • Basically, 360 x 360 dpi is not recommended.
•In the 360 dpi mode, the dot diameter is small and therefore
the density is low and banding is remarkable.
360 x 540 • Use for high-speed output applications is recommended.
•6-pass specification or higher is recommended.
In the 6-pass specification or higher mode, the amount of feed
is small and the accuracy improved, allowing banding to be
reduced by software processing.
In addition, good fixing and drying characteristics can reduce
banding caused by beading.
•Jetcol4000 is recommended in using the Sublimation dye ink.
It enables to reduce cockring phenomena.
720 x 720 • Basically, 720 dpi is recommended.
•8-pass specification or higher is recommended.
In the 8-pass specification or higher mode, the amount of feed
is small and the accuracy improved, allowing banding to be
reduced by software processing.
In addition, good fixing and drying characteristics can reduce
banding caused by beading.
•If the desired density cannot be obtained, "2 layers" is recom-
mended.
When use the Water-
based pigment ink :
•Mat synthetic paper
•PET (gloss)
When use the Sublima-
tion dye ink :
•Jetcol4000
JV22 series specified ink
No. Ink Type The number of color
1Exclusive Water-based Pigment ink (SPC-0180∗)8
2Exclusive Sublimation Dye ink (SPC-0370*) 6
JV22 series image quality standard media
PET(gloss) recommended by MIMAKI is used as a image quality standard media to
maintenance, and adjustment.
(∗is indicates color code.)
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– 2.1 –
CHAPTER 2
EXPLANATION OF OPERATION
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–2.2 –
2-1. Explanation of electrical components
2-1-1. Operations
*The slider of the JV22 is provided with four heads with inline 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. This device
uses four different vibration waveform modes: the V1 (Variable1) mode which enables four gradations
(L, M, S, and NONE) 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 main PCB is provided with two FPGAs (HDCs) which generate the driving signal (COM wave-
form) to be applied to the piezo-electric element of one nozzle row for two heads. 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 128MB
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 JV22. 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 problem, the number of signals has been reduced through serial signal transmission with the
main PCB using IO PCBs. This signal processing is performed by the FPGA (PDC) 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
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