Ribbon Mechanism - Epson LX-300+II RTP Service Manual

EPSON LX-300+II/300+II RTP/1170II
CARRIAGE HOME POSITION (HP) DETECTOR
The table below shows the HP detector specifications.
Table 2-6. HP detector Specifications
Item
Method
Switching rate
Switching mode
HP detector detects the signal right after when the CR motor switches the phase.
2.2.2.1 High speed skip method
At no-printing area, the carriage moves at high speed compared to the normal carriage
speed at printing. This is called carriage control.
Operating Principles
Specification
Mechanical contact method
0.6 to 1.0 mA, 5 VD±5%
• out of HP: close
• within HP: open

2.2.3 Ribbon Mechanism

2.2.3.1 Ink Ribbon Shifting Mechanism
Ink ribbon shifting mechanism: CR motor drives the timing belt and the timing belt driven
pulley drives the ribbon shifting gears.
2.2.3.2 Color Ribbon Driving Mechanism (Option)
Color ribbon driving is only available for LX-300+II.
Color ribbon driving mechanism: shifts the color ribbon up and down to change the
color area of the ribbon to be used for printing.
Color ribbon mechanism consists of the color shift (CS) motor, CS cam, ribbon detector,
CS lever assembly and color cartridge holder. Color ribbon is installed on the color
cartridge holder.
When CS motor runs, 1) the pinion revolves CS cam, 2) the CS lever assembly on the CS
cam shifts the color cartridge holder up and down and 3) drives ribbon up and down.
Item
Motor type
Coil resistance
Control method
Phase drive
Drive voltage
Consuming current
Drive frequency
Printer Mechanism
Table 2-7. CS Motor Specifications
Specification
2-phase/48-pole PM stepping motor
150Ω ±5% (25°C, per 1 phase)
uni-polar rated voltage drive
2-2 phase
36.75 ± 1.75 VDC
• Operating, peak current: 245 mA
• Non-operating: 20 mA
500 pps
Revision D
48