MIMAKI CJV30 Series, Руководство по обслуживанию, Страница: 58 / 316

© 2009 MIMAKI ENGINEERING CO.,LTD. 2.2.1 P.1
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Maintenance Manual > Electrical Parts > Operating Description > Operation Explanation
Model CJV30/TPC Issued 2008.08.04 Revised 2010.11.05 F/W ver. 2.50 Remark
1.2
Rev.
2.2.1 Operation Explanation
 Outline
 This machine’s print head carriage has one head with 180 nozzles (180 dpi) x 8 rows.
 Ink is ejected from the ink chamber by vibrating the piezoelectric elements of the heads.
For this vibration waveform, the printer uses variable waveform which can permit 4-step expressions (L, M, S and none).
 The head is connected to the main PCB assy in the electrical box, and it is driven by a drive signal (COM waveform)
applied to the piezo of one nozzle row for each of the eight rows of nozzles.
FPGA (HDC) is mounted on the main PCB assy. The FPGA (HDC) applies the COM waveform in synchronization
with the scale interval of the linear encoder scale and simultaneously sends the nozzle data to the head.
In addition, the COM waveform is automatically corrected based on the registered head ID. It is also corrected
based on the ID registered in the head memory, other information, and the ambient air temperature detected.
(In case the head ID is not registered correctly, no ink may be ejected.)
 The main PCB assy has FPGA (PDC), which takes charge of image processing and controls the SDRAM picture
memory (PRAM).
PRAM is mounted on PRAM PCB assy and the PRAM PCB assy has a capacity of 128 MB. Of the data output from
the host PC, the command part is analyzed by the CPU and the image part is transferred to the memory.
The PRAM is a ring memory and when data for one scanning session has been accumulated, the heads start
scanning. One scanning session creates images only in 180 dpi (6-colors / 6-W / 7-colors / 8-colors) or in
360 dpi (4-colors) in the X direction. Therefore, the printer completes the image in the targeted resolution while
feeding the media by a required distance.
 In case of printing by the use of pens and cutters, when the main PCB assy receives a command from I/F to
implement printing, it buffers the command to a memory for exclusive use (32MB SDRAM) and starts printing
by analyzing the command.
 This model is equipped with many I/Os such as step motors and sensors. If all of them were connected directly to
the main PCB assy, routing the wiring and replacing the PCB would be difficult. To avoid this, a station PCB assy,
X-axis motor relay PCB assy and head slider PCB assy are connected with the main PCB assy in series, reducing
the number of signals exchanged. The signals are processed by the FPGA (IOC) mounted on the main PCB assy.
180 dpi
Scanning direction
Paper feeding direction
Nozzle Arrangement of Head (Rear View)