Operating Principles
Rev. A
2-9
2.1.5 Paper Feed Mechanism
The paper feed mechanism consists of the platen roller, PF roller (Paper Feed roller), paper
eject roller, PF motor (Paper Feed motor), tractor unit, PEW sensor (Paper Width sensor),
front/rear paper sensor, release sensor, paper jam sensor, and paper shift mechanism.
2.1.5.1 Core of the Paper Feed Mechanism
This printer feeds paper by sliding it horizontally. Paper feed operation varies depending on
the release lever setting condition, as described below:
In the friction mode
Paper is held by the front paper bail and the for roller assemblies (2 upper and 2 lower
rollers) under the CR guide shaft.
Feeding method:
Front feeding (automatic), Rear feeding (manual), CSF feeding
Ejecting method:
Front ejection
In the tractor mode
Switching the lever setting from the friction mode to the tractor mode puts the printer into
the tractor mode. In the tractor mode, the drive is disengaged from the rollers by the
release mechanism, and transmitted to the tractor side.
Feeding
method:
Tractor
Ejecting method:
Front ejection
In the paper jam removal mode
Torque is disengaged from all the rollers in this mode. (See Section 2.1.5.3.) A stepping
motor is used for the PF motor, which enables the paper to move to and stop at any
position regardless of the direction. The motor is controlled by the controller circuit by the
open-loop system. It refers to the signals output from the sensors in the mechanism to
determine the amount to slide paper and the corresponding motor pulse. Torque sent
from the PF motor equally splits to the front and rear paper feed drive rollers via the 2
timing belts. If the belt tension is inappropriate (either too loose or too tense), the front
and rear rollers lose balance and paper jam is caused as the result. To balance the belt
tension with each other, reinstall the PF motor to the proper position. The PF motor is
fixed with 2 screws and the adjusting part such as the PF tension shaft. (See chapter 3
for detailed procedure.)
P r i n t e r M e c h a n i s m F r a m e
T r a c t o r T r a n s m i s s i o n G e a r
T r a c t o r
P a p e r F e e d M o t o r
P l a t e n
P a p e r E j e c t D r i v e R o l l e r A s s e m b l y
P a p e r B a i l R o l l e r
S u b P a p e r F e e d R o l l e r
A s s e m b l y
P a p e r F e e d D r i v e R o l l e r
Figure 2-7. Core of the Paper Feed Mechanism
Содержание DLQ-3000+
Страница 1: ...EPSON EPSON EPSON France S A SERVICE MANUAL DLQ 3000 PRODUIT ...
Страница 2: ...EPSON 24 PIN DOT MATRIX PRINTER EPSON DLQ 3000 SERVICE MANUAL SEIKO EPSON CORPORATION 4008259 ...
Страница 6: ...v REVISION SHEET Revision Issued Data Contents Rev A August 21 1997 First Release ...
Страница 62: ...2 3 12 Other Sensor Circuits 2 30 ...
Страница 160: ...Chapter 6 Maintenance 6 1 Maintenance 6 1 6 1 1 Lubrication and Adhesion 6 1 ...
Страница 171: ...DLQ 3000 Rev A A 6 ...
Страница 172: ...Appendix Rev A A 7 A 2 Circuit Diagrams Figure A 2 C210 MAIN Board Circuit Diagram 1 2 ...
Страница 173: ...DLQ 3000 Rev A A 8 ...
Страница 174: ...Appendix Rev A A 9 Figure A 3 C210 MAIN Board Circuit Diagram 2 2 ...
Страница 175: ...DLQ 3000 Rev A A 10 ...
Страница 177: ...DLQ 3000 Rev A A 12 Figure A 5 C124 PSB Board Circuit Diagram ...
Страница 179: ...DLQ 3000 Rev A A 14 A 3 Circuit Board Component Layout Figure A 7 C210 MAIN Board Component Layout 1 2 ...
Страница 180: ...Appendix Rev A A 15 Figure A 8 C210 MAIN Board Component Layout 2 2 ...
Страница 181: ...DLQ 3000 Rev A A 16 Figure A 9 C124 PSB Board Component Layout ...
Страница 182: ...Appendix Rev A A 17 Figure A 10 C124 PSE Board Component Layout ...
Страница 189: ...EPSON SEIKO EPSON CORPORATION ...
Страница 254: ...PC 437 USA Europe standard Annexe A 27 ...
Страница 255: ...PC 850 Multilingue PC 860 Portugais PC 863 Français canadien PC 865 Norvégien A 28 Annexe ...
Страница 256: ...PC861 Islandais BRASCII Portugais brésilien Abicomp Portugais brésilien Annexe A 29 ...
Страница 259: ...A 32 Annexe ...
Страница 262: ...Utilisation du sommaire des commandes A 10 V Vitesse 2 25 W Windows Microsoft 1 17 18 Index 3 ...