Epson 7000 service manual Carriage & Carriage Components

EPSON Stylus Pro 7000 Revision B

CARRIAGE & CARRIAGE COMPONENTS

The SP 7000 uses a special system to ensure the distance between the printhead nozzles and paper remains the same for all supported paper types. The carriage is composed of two sections; main carriage and subcarriage. The subcarriage can be moved closer or further away from the platen using the PG Cam which is driven by the PG Gear. The distance changes according to the position of the PG Cam.

The main carriage attaches to the CR Guide Rail using bearings and it supports the subcarriage. The subcarriage houses the printheads.

C A U Do not remove or loosen the screws that secure the CR guide rail, also do not remove the carriage. These parts are adjusted to 1/100th of a mm at the factory.

The printheads are the same type used in the EPSON Stylus Pro 9000 and EPSON Stylus Pro 5000. The design of the printhead holder is the same and the printheads are replaced in the same way. Therefore, after replacing the printheads, hardware and software adjustments are necessary to make sure the nozzles are lined up and to make sure ink dots are fired in the correct places. See Chapter 5 for details.

Carriage

PG Cam

PG Gear

PG Gear

Extension

Printhead

CR Guide Rail (frame span)

Bearings

Other sensors and components attached to or related to the carriage are:

†P-EDGE sensor

This sensor measures the distance between the right and left edges of the paper. Where paper exists, the light emitted from the sensor is reflected back to the sensor. In this way the sensor determines the right and left paper-edge positions and the width of the paper. For more details, see “Paper size detection - right and left edges” on page 73.

		Cutter housing
Left	Right
			Carriage
edge	edge

Subcarriage

(printhead slots)

Figure 2-8. Carriage Mechanism & CR Guide Rail (side view)

P_EDGE	HP side
sensor

Paper

Figure 2-9. Paper width sensor

Operating Principles Description of Components 61