How To Determine The Media Advance Correction Factor - Oce Arizona 440 GT User Manual

User Manual: Arizona (AZ) 440 GT, AZ 440 XT, AZ 460 GT, AZ 460 XT, AZ 480 GT, AZ 480 XT - Rev. B, 4/2013
How to Determine the Media Advance
Correction Factor
Introduction
When you print on roll media, there can be discrepancies in the amount
the media advanced during each print swath. This is referred to as media
stepping. It can cause banding to occur, in the form of either dark lines or
white gaps. The figure below illustrates this banding.
[76] Media Advance Banding
• A) Understep can result in dark lines, where the media has not advanced
enough and the placement of a swath overlaps the prior swath. This
requires a higher correction factor.
• B) Overstep can result in white gaps, where the placement of a swath is
displaced a significant distance away from the prior swath. This requires
a lower correction factor.
• C) Perfect Step, where media advances correctly. This requires no
change.
Purpose
The Media Advance Correction Factor (MACF) allows the operator to fine-
tune media stepping and to optimize print quality.
When to do
The MACF is only required when this particular banding occurs. If you
don't see any banding in your images, there is no need to change the
value from its default setting of 50.
Before you begin
It is critical to load the media so that the media edge on the feed and take-
up rolls are aligned within 1mm.

How to Determine the Media Advance Correction Factor

Chapter 7 - How to Operate the Roll Media Option 139