How To Manage The Media Vacuum; The Media Vacuum System - Oce Arizona 365 GT User Manual

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How to Manage the Media Vacuum

Introduction

The Océ Arizona 365 GT uses a low-flow, high-vacuum system to secure rigid media for printing

on the printer table. A fabricated aluminum overlay sheet placed on the surface of the table

creates the vacuum field. The overlay sheet is pin-registered to the table. A rotary vane vacuum

pump is used to evacuate the chamber of air between the sheet and the table. Three air-feed

ports connect the chamber to the vacuum pump through a series of manually operated flow

valves. These valves are used to activate or shut down the different vacuum zones. In order for

the system to work effectively during printing all the circular pockets on the top surface of the

overlay sheet connected to an active vacuum chamber must be covered. This creates a closed

vacuum system. A bleed valve is provided to adjust the level of vacuum, if so desired.

Vacuum Overlay Sheet

The vacuum overlay sheet is supported on the table by 0.5mm diameter formed half-shear

features. This produces a small gap between the sheet and the top of the table for air to flow.

Foam tape applied around the perimeter of the sheet provides an edge seal. Additional foam tape

can be used within the perimeter to create up to three custom vacuum zones. The 0.5mm

diameter half-shear feature creates the equivalent of a counter-bored hole or circular pocket on

the top surface of the panel. Each of these pockets is connected to the sealed underside of the

panel by 1.5mm diameter punched holes.

Default Vacuum Zones

The printer is shipped from the factory configured with one large vacuum zone that

accommodates the maximum media size. There are two suggested custom vacuum zone

configurations, one for Metric and one for Imperial units. These zones can be set up for common

media sizes, and can be modified with additional foam tape. The next section has more

information on how to create custom zones.

Illustration

[37] Vacuum Zone Controls

1 - Bleed Valve partly

open

3 - Top Zone is

Chapter 5 - How to Operate Your Océ Arizona Printer

2 - Left Zone is Open

4 - Right Zone is

Open

Closed

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