Epson LX-300+II RTP

EPSON LX-300+II/300+II RTP/1170II Revision D
Operating Principles Printer Mechanism 46
2.2.2 Carriage Mechanism
The following are the components of the LX-300+II/1170II carriage mechanism and their
explanation. (Figure 2-2, "Printer Mechanism Block Diagram")
 Carriage: Mounts the printhead.
 CR motor: Drives carriage in the printing column direction.
 Timing belt: Transfers the drive from the CR motor to the carriage.
 Carriage guide shaft: Shifts the carriage parallel to the platen.
 HP detector: Detects carriage home position.
CR MOTOR
This printer uses a stepping motor for CR motor. Open loop control switches the phases
according to the setting period and this mechanism enables the carriage to move until the
appointed position. The table below is the CR motor specifications.
Table 2-4. CR Motor Specifications
Item Specification
Motor type 2-phase/200-pole hybrid stepping motor
Coil resistance 4.5Ω±10% (25°C)
Control method Bi-polar drive
Phase drive 2-2 phase, 1-2 phase, W1-2 phase
Drive voltage 35 VDC +5/-10 %
CR feed pitch
Minimum Resolution:
0.212 mm (1/120”) (2-2 phase, 1 pass)