Xerox Versant 80 Press Expectativa do cliente e manual de instalação - Página 46
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Operational Considerations
5 Operational Considerations
Image Quality Expectations
Image Quality
As with any printing process, artifacts will occur. These may include banding, streaks, mottle, spots, and more. For most jobs and clients, the expected level of
artifacts is within the normal operational and component quality ranges of the system and will not affect the acceptability of the job. Maintenance procedures
are available to mitigate these artifacts.
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Artifacts may occur with more frequency when running heavyweight coated media.
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Certain jobs may show bands across the sheet when running ~350gsm media.
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Edge deletions are most common when duplex printing on heavier (>220 gsm / 85 lb. Cover) stocks and when using the maximum available image area.
Deletions can be mitigated by using less than the maximum imageable area, i.e. allowing extra blank space at the lead and trail edges of the paper
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Using products on the Recommended Materials List (RML) and maintaining your environment will help to minimize the occurrence of these artifacts.
Color quality perception is subjective and will be affected by ambient lighting conditions.
The customer is responsible for calibrating the Press. Refer to the Press customer documentation for guidelines.
Image quality is strongly influenced by paper surface structure, texture, and color. To ensure satisfaction of your customers, key jobs should be printed on the
Press using representative paper for review by the customer.
The surface texture of some uncoated papers may cause increased graininess in halftone areas printed with only black toner. This effect may be minimized by
using smooth or coated papers (refer to the Recommended Media List).
Sheets in a job may exhibit slight variation in gloss within a page (variation across page in the process direction).
Prints may exhibit random white spots caused by paper dust, stray developer beads, or other particles. You can reduce the occurrence of white spots by using
Xerox approved paper. If you are cutting your own paper, ensure that cut edges are dust free, and keep the machine in a clean and dust/dirt reduced
environment. Failure to do this will result in increased frequency of white spots.
Xerox recommends use of the SIQA toolset to improve registration on certain media, correct density if inboard-to-outboard density variation is observed, or if
mottle is observed on side or side 2.
Printing Expectations
Product Limitations and Caveats
When printing a large number of one page jobs in a row a 45-310 fault could occur requiring a full system reboot.
The maximum rated print speed may be affected by job types and job settings. Productivity may be affected by the press cycling down/cycle up within or
between jobs, and finishing options that are selected for a particular job.
Overall productivity may also decline due to the press pausing to make adjustments to maintain consistent image quality. More frequent image quality
adjustments and more severe productivity loss may be seen for the following job types:
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Low area coverage jobs (3% area coverage per color or lower)
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Mixed media jobs; refer to Tray Switching and Mixed Media Test Results and Print Engine Productivity Charts
NOTE: Impact to productivity depends on the specific attributes of each job.
If utilizing the Offset Catch Tray (OCT), overall productivity will decline if offsetting mode is selected. The print engine will pause printing in order to offset
between sets and then resume printing. Productivity loss depends on the number of sheets per set with single-page jobs representing the worst case
(approximately 50% productivity loss).
In certain conditions (e.g. high temp., heavy media, high area coverage), printed sheets may stick to each other. In these situations, the operator should select
the Ink Setoff Prevention setting to "Always On". This will slightly increase the gap between pages as they are printed, allowing them more time to cool down.
Print speed will be slightly reduced as a result. Note that this condition may be more likely when printing to the OCT or BR finisher.
Tabs or Ordered/Sequenced stock will need to be confirmed by the operator when the printer is powered on and when exiting power save mode. This is done by
opening the paper tray, verifying that the first tab or sheet in the series is on top, and then closing the paper tray.
When printing a 2-sided job that utilizes Tabs, overall productivity will decline because the press must switch between 1-sided mode (for Tabs) and 2-sided
mode (for body sheets). The severity of productivity loss depends on the number of Tabs in the job (more Tabs results in greater loss of productivity).
If the operator changes the Auto Tray Switching from the default Near Empty to Empty the print engine will pause to switch the new tray.
If the customer network is using a 100.100.100.x IP address series, conflicts will occur.
Auto Supplies Replenishment (ASR) will not function through XDA clients, only direct connect will enable ASR.
Stopping or cancelling a job that is utilizing a 3
be notified of the situation.
Integrated Fiery and EX Print Server:
When running a job that includes both coated and uncoated paper, the Output Profile (found in the advanced color management settings) must be changed
from "default" to the "coated" profile.
Only the 21 patch color calibration target should be used when calibrating the press. Calibrating with the 51 patch target will cause undesirable color
rendition.
Multiple single page jobs submitted in a large batch will cause the press to fault and require a power cycle. Running multi-page jobs in between the single
page jobs will improve this problem.
Factors Affecting Productivity and Rated Print Speed
The rated print speed refers to the maximum print or copy speed enabled for the press. Over the course of a print job, the press will perform automatic process
adjustments in order to maintain consistent Image Quality. As a result, actual productivity for a job may be less than the rated speeds shown. The actual print
speed (PPM) achieved depends on a number of factors including the stock type, stock size, and number of sheets in the job.
Customer Expectation and Installation Guide
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party DFA connected finisher while printing may cause some booklets to be incomplete and the user will not
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