EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850
Revision A
OPERATING PRINCIPLES
Printer Mechanism
39
2.2.3 Carriage Mechanism
The Carriage Mechanism consists of Carriage Unit (including the Print Head, CR
Encoder Board and PW Sensor), CR Motor, Timing Belt and CR Scale etc.
Following figure shows you each component for the CR Mechanism.
2.2.3.1 Carriage Mechanism
The following DC motor controls the CR Mechanism on this printer.
Close loop control based on the CR Motor (DC Motor) and CR Encoder has
advantages in stabilized print quality.
Heat generation control
Using low-cost DC motors, this product grasps the variations of the torque
constants, coil resistances and power supply voltages of the individual DC motors
adequately to carry out heat generation control according to individual differences.
CR variation measurement sequence
The variations of the torque constant, coil resistance and power supply voltage of
the motor are measured in a CR variation measurement sequence when the CR
mechanical load is in the initial status and saved into the EEPROM. According to
the variations (individual differences) measured in this sequence, the voltage is
corrected to make the drive current value constant (without an individual
difference).
CR measurement sequence
To set the appropriate drive current value according to the variation of the CR
mechanical load, the mechanical load is measured in a CR measurement sequence
and saved into the EEPROM in a power-on or I/C change sequence. A fatal error
will occur if too much load is applied to the CR drive system.
The above control and sequences correct the drive current value of the CR Motor
according to not only the mechanical load but also the variations of the motor and like.
In addition, the resultant CR drive current value is used to calculate a heating value,
and when the specified heating value is reached, wait time is provided per CR path for
printing.
Figure 2-5. Carriage Mechanism
Table 2-1. Carriage Motor specification
Items
Specifications
Type
DC motor with brushes
Drive Voltage
42V (DC) ± 5% (voltage applied to driver)
Armature resistance
29.1
Ω
± 10% (per phase at 25 degrees)
Inductance
20.1mH ± 25%
Drive Method
PWM, constant-current chopping
Driver IC
A6627
Carriage Unit
CR Motor
Carriage Guide Shaft
Timing Belt
CR Scale
CR Encoder Sensor
PW Sensor
Содержание CX3810 - Stylus Color Inkjet
Страница 1: ...EPSON StylusCX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Color Inkjet Printer SEIJ05 012 SERVICE MANUAL ...
Страница 5: ...Revision Status Revision Issued Date Description A Aug 10 2005 First Release ...
Страница 8: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 35: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 61: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 92: ...C H A P T E R 4 DISASSEMBLY ASSEMBLY ...
Страница 133: ...C H A P T E R 5 ADJUSTMENT ...
Страница 148: ...C H A P T E R 6 MAINTENANCE ...
Страница 155: ...C H A P T E R 7 APPENDIX ...
Страница 168: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C612 MAIN Rev B Sheet 1 2 ...
Страница 169: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C610 PSB Rev B Sheet 1 1 ...
Страница 170: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C610 PSE Rev B Sheet 1 1 ...
Страница 171: ...Model Stylus CX3700 CX3800 CX3805 CX3810 DX3800 DX3850 Board C612 PNL Rev A Sheet 1 1 ...