© 2014 MIMAKI ENGINEERING CO.,LTD.
2.2.1
P.1
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R.1.0
2.2.1 Operation Explanation
Outline
The print head carriage of 300 series has two 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 machine uses variable waveform which can permit 4-step expressions (L, M, S
and none).
The head1 is connected to the COM32 IO 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.
The head2 is connected to the SL2H PCB assy.
FPGA (HDC) is mounted on the COM32 IO PCB assy. and SL2H PCB. 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 256 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 360 dpi (4-colors) in the X direction. Therefore, the
machine completes the image in the targeted resolution while feeding the media by a required distance.
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, COM32 IO PCB
assy., SL2H assy. and CART IO PCB assy. are connected with the main PCB assy. in series, reducing the number
of signals exchanged. The signals are processed by the FPGA (PDC) mounted on the main PCB assy.
180 dpi
Scanning direction
Paper feeding direction
Nozzle Arrangement of Head (Rear View)
MAINTENANCE MANUAL > Electrical Parts > Operation Explanation > Operation Explanation
Model
JV300-130/160
Issued 2014.05.30 Revised
F/W ver.
1.00
Remark
1.0
Rev.