Epson SEIJ98006 Paper Feed Mechanism, 11. PF Motor Specifications, 12. PE Sensor Specifications

EPSON Stylus Color 900 Revision C

2.2.4 Paper Feed Mechanism

The paper feed mechanism manages constant paper feeding during printing through to paper ejection. Unlike previous models, the PF motor of this printer only drives the paper feed mechanism, having no connection with the carriage lock mechanism nor the pump mechanism. See Figure 2-5 and Table 2-11 for the cross section of the paper feed mechanism and the PF motor specifications, respectively.

Table 2-11. PF Motor Specifications

No.	Items	Specifications
1	Type	4-phase / 200-pole / HB-type stepping motor
2	Drive voltage	42 VDC ± 5% (Applied to the driver)
3	Coil resistance	8.1 Ω ± 10%
4	Drive mode	Bipolar constant current drive mode

For the printer-specific feature, the PF motor pinion transfers torque to the PF drive gear without any transmission gear in between. The gears used for the PF motor pinion and the PF drive gear are very precise.

Therefore, note the points below when handling them:

1. Do not touch the gear surface with your bare hands.

See Table 2-12 and Table 2-13 for the PE sensor specifications and the PE sensor switch mode, respectively.

Table 2-12. PE Sensor Specifications

No.	Item	Specifications
1	Type	Transmission-type photoelectric transfer
		system
2	Drive voltage	5 VDC ± 5% (Applied to the driver)
3	Collector resistance	30 VDC or less

Table 2-13. PE Sensor Switch Mode

Paper	Switch mode		Output voltage
installation
Not installed	Open	0.7	VDC or less
Installed	Closed	2.4	VDC or more

P a p e r

A c t u a t o r

P E s e n s o r

N o t c h e d rSo ulleb rr o l l e r P F d r iv e ge a r

2.Keep other parts or tools for servicing such as screw drivers away from the gears.

The PE sensor in the paper feed mechanism is used to check the following:

1.During paper loading, checks if the leading edge of the paper from the ASF is correctly transported.

2.Checks if the paper loaded meets the specifications.

3.Checks if the paper is properly ejected after printing is over.

4.Checks if paper is jamming.

P a p e r e je c t io n

P F ( p o w d e r y - c o a t e d ) r o lle r r o lle r

P F m o t o r p in io n

Figure 2-5. Paper Feed Mechanism

Operating Principles Printer Mechanism Operating Principles 51