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EPSON Stylus CX3500/CX3600/CX3650/CX4500/CX4600
Revision A
OPERATING PRINCIPLES
Printer Mechanism
56
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.
V
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.
V
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).
V
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
28.4
Ω
± 10% (per phase at 25 degrees)
Inductance
20.1mH ± 25% (1KH 1Vrms)
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
Summary of Contents for Stylus CX3500 Series
Page 1: ...EPSON STYLUSCX3500 CX3650 CX3600 CX4500 CX4600 Color Inkjet Printer SEOT04 004 SERVICE MANUAL ...
Page 8: ...C H A P T E R PRODUCTDESCRIPTION ...
Page 52: ...C H A P T E R OPERATINGPRINCIPLES ...
Page 79: ...C H A P T E R TROUBLESHOOTING ...
Page 113: ...C H A P T E R DISASSEMBLYANDASSEMBLY ...
Page 161: ...C H A P T E R ADJUSTMENT ...
Page 174: ...C H A P T E R MAINTENANCE ...
Page 181: ...C H A P T E R APPENDIX ...
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