H550 AE
Rev.: 001
kortho
KGJ X18
3-1
3 PRINT PROCESS DESCRIPTION
3.1 Print cycle
The purpose of the printer is to print a label on a substrate. A label is digital data and is stored in the
memory of the control unit. The control unit converts the image into a bitmap. The printhead receives this
bitmap pixel-column by pixel-column and uses it to fire ink dots on the substrate. The ink drop fire rate is
controlled by pulses, which are generated by either an internal clock or an external encoder. The vertical dot
resolution is always 185 dpi; the horizontal dot resolution depends on the speed setting. At the correct
speed, by parameter setting or use of an encoder, the print resolution is 185 x 185 dpi.
The print cycle is initiated with a signal, called ‘print request’, and generally generated by a photocell, which
detects the product or special mark on the substrate. When a print has been made, the bitmap will be
updated, if necessary, for label items such as time, date and number. When this is done, the busy output is
deactivated and the printer is ready for the next trigger signal.
3.2 Printhead
The heart of the GraphicJet printer is the printhead. The printhead uses patented digital drop on demand
(DOD) piezo ink jet printing technology. It is seen in a range of industrial printing applications, including
coding and marking, as it is a versatile technology able to print on a wide variety of substrates.
This printing technology uses a ceramic material that deforms when an electric field is applied to it. This
deformation is harnessed in order to eject ink from each of the printhead's ink channels in a highly
controlled and repeatable manner. Each pixel on the substrate is either covered with ink or not - a binary
choice.
In simplified overview, the technology consists of a series of ink chambers packed together into a printhead,
divided by shared chamber walls with an electrode attached to each side (Fig. 3.1)
.
Fig. 3.1
Piezo printhead technology
The piezo material is made of lead zirconate titanate (PZT). This ferroelectric ceramics becomes piezo-electric
when poled.
When a voltage is applied across this material the material distorts or bends. This phenomenon is
implemented in the printhead by machining rows of parallel channels into a PZT block. An electrode is then
placed onto the sides of the channel walls allowing a voltage to be applied across it. The way in which the
wall bends due to the applied voltage is known as 'shear mode'. Two channels share the wall, and hence the
term shared wall.
The channels are filled with ink and a pressure wave inside the ink is generated due to the distortion of the
PZT walls. The height and width of the chambers do not alter; they simply just shift to one side. This
1.
Piezo material (PZT)
2.
PZT poling
3.
Shared walls
4.
Shear mode actuation
5.
Ink chamber
6.
Nozzle
7.
Electrode
8.
Signals
Содержание GraphicJet X Series
Страница 1: ...MANUAL GraphicJet X series Edition H550 AE Rev 001 English kortho...
Страница 9: ...H550 AE Rev 001 kortho KGJ X18 ix...
Страница 10: ......
Страница 16: ...INTRODUCTION kortho KGJ X18 H550 AE Rev 001 1 6...
Страница 32: ...PRINT PROCESS DESCRIPTION kortho KGJ X18 H550 AE Rev 001 3 10...
Страница 94: ...OPERATION kortho KGJ X18 H550 AE Rev 001 8 28...
Страница 120: ......
Страница 126: ...MAINTENANCE kortho KGJ X18 H550 AE Rev 001 10 6...
Страница 138: ......
Страница 139: ...H550 AE Rev 001 kortho KGJ X18 B 1 Appendix B Dimensions Coding unit B 2 Control unit B 3 Standard bracket B 4...
Страница 140: ...APPENDIX B DIMENSIONS kortho KGJ X18 H550 AE Rev 001 B 2 Coding unit and Bracket Dimensions are metric mm...
Страница 141: ...APPENDIX B DIMENSIONS H550 AE Rev 001 kortho KGJ X18 B 3 Control unit Dimensions are metric mm...
Страница 142: ...APPENDIX B DIMENSIONS kortho KGJ X18 H550 AE Rev 001 B 4 Control unit and Bracket Dimensions are metric mm...
Страница 145: ...APPENDIX C PART LISTS ILLUSTRATIONS H550 AE Rev 001 kortho KGJ X18 C 3 Coding unit X18...
Страница 147: ...APPENDIX C PART LISTS ILLUSTRATIONS H550 AE Rev 001 kortho KGJ X18 C 5 Control unit TsC20 X18...
Страница 149: ...APPENDIX C PART LISTS ILLUSTRATIONS H550 AE Rev 001 kortho KGJ X18 C 7 Standard bracket control unit TsC20...
Страница 150: ...APPENDIX C PART LISTS ILLUSTRATIONS kortho KGJ X18 H550 AE Rev 001 C 8...
Страница 153: ...APPENDIX D CONNECTIONS H550 AE Rev 001 kortho KGJ X18 D 3 X3 Schematic diagram input...
Страница 154: ...APPENDIX D CONNECTIONS kortho KGJ X18 H550 AE Rev 001 D 4 X3 Schematic diagram output...
Страница 155: ...APPENDIX D CONNECTIONS H550 AE Rev 001 kortho KGJ X18 D 5 X3 Circuit diagram input...
Страница 156: ...APPENDIX D CONNECTIONS kortho KGJ X18 H550 AE Rev 001 D 6 X3 Circuit diagram output...
Страница 158: ......
Страница 171: ...APPENDIX E NICELABEL DRIVER TUTORIALS H550 AE Rev 001 kortho KGJ X18 E 13...
Страница 172: ......
Страница 174: ...APPENDIX F QUICK REFERENCE kortho KGJ X18 H550 AE Rev 001 F 2...
Страница 177: ...APPENDIX G ERROR LIST H550 AE Rev 001 kortho KGJ X18 G 3...
Страница 178: ...bv korthofah P O box 3040 2222 AG Katwijk The Netherlands...
