Epson PowerRIP Stylus Guia do Utilizador descarregar pdf (Página 15)

Chapter 4

Operational Overview

Understanding the PowerRIP printing

architecture.

There are 4 main components in a PostScript printing

environment. 1) The application that creates the page, 2) The

PostScript driver which generates the PostScript code when an

application prints the page, 3) The PostScript Raster Image

Processor (RIP) which interprets the PostScript code and renders

a rasterized representation of the page, 4) The physical connec-

tion (port) and 5) The actual printer. In some printers, the

PostScript RIP is “built in” to the printer but it is, nevertheless, a

separate computer. We refer to these as “hardware RIPs”. There

are some disadvantages to hardware rips as they are not easily

upgradeable and are virtually impossible to troubleshoot and

maintain by the end-user. These units are also much more

expensive than software-based RIPs and they can only drive the

printer to which they are attached.

PowerRIP ImageSet is a “Software RIP” meaning that the

PostScript RIP is external to the printer and runs on the host

computer (print server) this allows the RIP to take full advantage

of the power available in today’s very powerful and relatively

inexpensive PCs. Software upgrades are painless, trouble-

shooting is possible by the end-user and he/she has complete

control over the system configuration. This approach also

enables the RIP to offer features that a hardware RIP could never

offer.

Hardware RIP Job Flow

Front-End Application

(Quark XPress, etc.)

Windows PostScript

Driver

Physical Port

(USB, LPT, etc.)

Hardware RIP/

Printer

In the hardware RIP architecture, the application prints its

page, the Windows PostScript driver generates the PostScript

code and sends it to the physical port (USB, LPT, etc). The RIP

(which is part of the printer) receives the PostScript, rasterizes it

and drives the printer to which it is attached.

PowerRIP ImageSet Job Flow

Because it is external and much more versatile, the

PowerRIP job flow is a little more complex. This also allows

more crontrol and a much wider variety of configurations and

expansion. Here is a simplified flowchart of the job path when

printing to PowerRIP ImageSet.

Front-End Application

(Quark XPress, etc.)

Windows PostScript

Driver

Physical Port

(USB, LPT, etc.)

Printer

PowerRIP

Hot Folder

PowerRIP

Application (RIP)

PowerRIP

Output Queue

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 44 45

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