How To Determine The Media Advance Correction Factor - Oce Arizona 400 Series GT User Manual

How to Determine the Media Advance Correction Factor

Introduction
When you print on roll media, there can be discrepancies in the amount the media ad-
vanced 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.
[90] 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 You Determine the MACF
How to Determine the Media Advance Correction Factor
Chapter 7 - How to Operate the Roll Media Option 131