Epson Scan 2500 Carriage Mechanism and Motor, Carriage Motor Specifications, Phase drive, Rotor

EPSON Stylus Scan 2500 Revision A

2.2.3 Carriage Mechanism and Motor

The carriage mechanism moves the carriage back and forth according to the drive from the carriage motor. See Figure 2-6 on the next page.

The carriage motor is a 4-phase, 200-pole, stepping motor and is driven by 2-2 phase, 1-2 phase, Double 1-2 phase, 2-Double 1-2 phase, and 4- Double 1-2 phase drives. This stepping motor allows the carriage to move freely to fixed positions where necessary operations such as ink absorption can be performed. The following tables show carriage the motor specifications and motor controls.

Carriage Motor Specifications

Items	Description
Motor type	4-Phase/200-pole Stepping motor
Drive voltage Range	42VDC ± 5%
Internal coil resistance	7.8 Ohms ± 10%(per phase in 25 °C
	environment)

CR Motor Control for Each Mode

Printing mode	Drive Speed	Drive frequency	Drive method
	[CPS]	[PPS]
High Speed Skip	340	4080	Double1-2, 2-2,1-2
			phase drive*
Normal Printing	200	2400	Double 1-2, 2-2 phase
			drive
Capping	80	960	2-Double 1-2, 2-2 phase
			drive
Wiping	40	480	2-Double 1-2, 2-2 phase
			drive
Cap (Valve	20	240	4-Double 1-2, 2-2 phase
Release)			drive
Withdrawal of cap	5	60	4-Double 1-2, 2-2 phase
			drive

Control method	Bi-Polar Drive
Phase drive	2-2, 1-2, 2-Double 1-2, and 4-Double 1-2

1

A

Phase drive

Phase Drive	inch/pulse	mm/pulse
2-2	1/120	0.212
1-2	1/240	0.106
Double 1-2	1/480	0.053
2-Double 1-2	1/960	0.026
4-Double 1-2	1/1920	0.013

2 /A

Rotor

3

B

4

/B

Figure 2-5. CR Motor Internal Circuit Diagram

Operating Principles Printer Mechanism Operation 38