SATO GL4XXE Manual de servicio descargar pdf (Pagina 10)

Unit 1: Introduction

GL4xxe Series Service Manual

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THEORY OF OPERATION

When activated, media is fed past the print head by an integrated drive train. The drive train is electric, stepper

motor driven and coupled to a gear, pulley, and belt configuration located on the electrical side of the printer’s

center frame. A pulley is concentrically attached to the motor spindle and provides differential torque to a series of

pulleys via three timing belts. These pulleys, with gears concentrically attached, provide movement to the platen

roller spindles and provide media movement through treading contact with the roller.

Two separate stepper motors, transfer torque to the ribbon supply and ribbon rewind spindles by way of a belt

designated for each, and engaged on the opposite end, a pulley for each spindle. The pulleys located on the

printer’s electrical side, are directly attached to gears on the print side. When the ribbon spindles’ gears are

engaged with their respective pulley/gear combo, a separate gear, pulley, and belt configuration transfers torque

from the ribbon rewind spindles to ribbon rollers via a single timing belt located on the printer’s print side. The

ribbon rewind spindle rotates on axis while maintaining its projectory to takeup and rewind used ribbon.

To facilitate removal of the used ribbon material, it is wound onto a cardboard sleeve referred to as a core. The

core is inserted onto the spindle’s boss and rotates in unison. When rewinding is complete, the core is removed

along with the used ribbon material and a replacement core is inserted in its place.

Paper guides within the chassis assembly ensure the media remains properly positioned beneath the print

assembly and is fed unimpeded from the printer’s rear through to the front.

A series of strategically located sensors and switches send signals to the processing unit. Some sensors are two

part consisting of transmitting and receiving components. The transmitting component is mounted opposite of the

receiving component so that media may pass between the two. When present, the media blocks sensor

transmission from reaching the receiver. The processing unit in turn sends response signals to the various features

based on programmed and received data. These signals, are the controlling force of mechanical activities.

The print head, through thermal heat, inductively provided by electrical supply, transfers print images onto the

media as it passes. The print image may be manifested through either a direct process initiated through a chemical

reaction to the heat from within the label media or transferred from the ink coated ribbon stock.

Predetermined voltage supply of alternating current, from an independent source, is required for proper function.

The printer’s integrated power panel transforms the supplied voltage to direct current which is mediated to the

various circuitry. This circuitry is comprised of properly positioned transformers, relays, diodes, resistors, and chips

which sends, receives, and processes communication data throughout the system.

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SATO GL4XXE Manual de servicio Pagina 10