II-12
3.2
Print Head
This is an on-demand ink jet printer and ejects ink by the firing of a piezoelectric ceramic
actuator. Refer to Fig. 2.13 for the print head structure. A narrow channel filled with ink is
sandwiched between two actuators. When a voltage is applied to an electrode formed on
the surface of the actuator, ink is pulled into the channel from the manifold with the
actuator deformed as shown in the Fig. 2.13. When the voltage becomes 0, the actuator
returns to the previous position and pressure is generated in the ink in the channel. Thus,
the nozzle ejects ink drops. Ink drops are propelled forwards by this action and are fired
onto the paper held by the platen and form dots of the respective color. This printer
incorporates thirty-two ink firing mechanisms per color as explained above, 2 colors per
head with 2 print heads, 126 in total.
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< Head Specifications >
(1)
Method
PZT(Xaar) method with the dummy channel
(2)
Driving frequency
3.85 KHz, 6.5 KHz, 7.7 Khz
(3)
Injection droplet amount
Normal mode
:40 ± 5pl
Super fine mode
:25 ± 2.5pl
(4)
Composition
Separate color type
(5)
Number of ink
4 colors (Y/M/C/K)
(6)
Number of nozzles
128 nozzles (32 nozzles x 4 colors)
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Piezo
Ink
Piezo
Manifold
Fig. 2.13
Nozzle plate
Channel
Dummy channel
Ceramic
Содержание MP-21C
Страница 1: ......
Страница 2: ...SERVICE MANUAL MODEL MP 21C 21CDX ...
Страница 7: ...Chapter I FEATURES AND SPECIFICATIONS ...
Страница 11: ...I 3 3 CONFIGURATION 3 1 Mechanics Overview Fig 1 1 MP 21C MP 21CDX ...
Страница 29: ...Chapter II THEORY OF OPERATION ...
Страница 52: ...Chapter III DISASSEMBLY AND REASSEMBLY ...
Страница 95: ...III 42 Pick up roller ASSY EM2 EM2 Fig 3 64 ...
Страница 100: ...Chapter IV TROUBLESHOOTING ...
Страница 119: ...IV 18 LED INDICATING THE ERROR Example ROM error Power LED Alarm LED Ink BC LED Ink MY LED A lapse of time ON OFF ...
Страница 120: ...Appendix ...
Страница 122: ...Appendix 1 Head PCB Circuit Diagram CODE UJ7041000 MPHEAD SCH01 NAME A 1 ...
Страница 123: ...Appendix 2 Main PCB Circuit Diagram 1 3 CODE UJ7040000 MPMAIN SCH01P1 NAME A 2 ...
Страница 124: ...Appendix 3 Main PCB Circuit Diagram 2 3 CODE UJ7067000 MPMAIN SCH01P2 NAME A 3 ...
Страница 125: ...Appendix 4 Main PCB Circuit Diagram 3 3 CODE UJ7068000 MPMAIN SCH01P3 NAME A 4 ...
Страница 126: ...Appendix 5 Cartridge Sensor Circuit Diagram A 5 CODE UJ7061000 MPCTRG SCH01 NAME ...
Страница 134: ...R Mar 99 5H1002BE0 ...
Страница 136: ...UJ5394001 A Printed in Japan ...
Страница 157: ...UJ5351001 Printed in Japan ...
Страница 212: ...USER S GUIDE Index 2 T Transparencies 2 1 W Windows 5 6 ...
Страница 213: ...PARTS REFERENCE LIST MODEL MP 21C 21CDX R COLOR INKJET PRINTER ...
Страница 224: ... 9 8 ATTACHMENTS MODEL MP 21C CDX 5H1 001 002 910 4 3 5 6 1 2 7A 7B 7C 7D 7E ...
Страница 227: ...Mar 99 54H1002BE0 R ...