Epson 7600, 9600 service manual Pulse Positions, Position Gap Width Application Pulse Count from

EPSON Stylus Pro 7600/9600 Revision A

†HD_SLID (Head Gap Home Position Detection) Sensor

This sensor detects the mechanical home position when the position of the sub- carriage (head height from the paper surface) on the carriage undergoes change. A reflective type photosensor is used and the position of the flag on the gear mounted on the camshaft is detected.

The cam is so shaped as to realize the four head positions relative to the mechanical home position.

„ Detecting distance up to the reflector: 7.5 ± 0.5 mm

NOTE: Error number displayed when the total pulse count has exceeded 1000: 0001000C Head slide origin detection error (Service Call Error)

Table 2-4. Pulse Positions

Position	Gap Width	Application	Pulse Count from
			Origin (Converted to 2-
			2 Phase Excitation)
Large	2.6 mm	Platen gap for thick paper	37
Medium	2.2 mm	Platen gap for paper which can be	121
		soiled if setting is for thin paper
Small	1.2 mm	Platen gap for thin paper	204
Minimum	0.7 mm	Platen gap for film	287
One round			333

Start

Sequence for moving to pseudo-vacuum position

Slide Sensor OFF		Yes
?
	No

Pump motor runs forward until head slide origin sensor turns

OFF

No	Slide Sensor OFF
	?

	Yes
Pump motor runs forward until head slide origin sensor turns
	ON
No	Slide Sensor ON
	?
	Yes

After head slide origin sensor turns ON, pump motor runs

forward by 10 pulses

Pump motor runs forward until head slide origin sensor turns
	OFF
No	Slide Sensor OFF
	?
	Yes

Pump motor runs forward by 204 pulses (till the “Small”

platen gap position)

Pump motor runs forward by 18 pulses (till epicyclic gear

release)

End

Figure 2-5. Head Slide (PG Change) Initialization Sequence

Operating Principles Print Mechanism Components 107