Canon imagePROGRAF iPF820 User Manual page 558

Adjusting the Printhead
Automatic Straightening of Lines and Colors (Auto Head
Adj.)
If printed vertical lines are warped or colors are out of alignment, adjust the Printhead alignment.
Use Auto Head Adj. to have the printer print and read a test pattern for automatic adjustment of the printhead.
Auto Head Adj. offers two modes, Standard Adj. and Advanced Adj..
Standard Adj. will x most slight image distortion or color misalignment, but if not, try Advanced Adj..
Note
•
If advanced adjustment does not improve printing results, or if you are using special paper, try manual
adjustment.
For instructions on manual adjustment, see "Manual Straightening of Lines and Colors (Manual Head
Adj)". (→P.546)
•
Use Standard Adj. if you have switched to another type of paper or if you want the boundaries between
colors to appear as attractive as possible.
•
Use Advanced Adj. to ne-tune the space between nozzles or colors if you have switched the printhead
or if you want printed documents to appear as vivid as possible. We recommend using Advanced
Adj. for printing at a higher level of image quality.
•
Always make sure the loaded paper matches the type of paper specied on the printer. Adjustment
cannot be completed correctly unless the loaded paper matches the settings.
•
We recommend using the type of paper you use most often for adjustment.
•
This function is not available with CAD Tracing Paper, CAD Translucent Matte Film, or CAD Clear Film.
If adjustment is not possible as expected using highly transparent lm or similar media, try another type
of paper, or try adjust the Printhead alignment manually. (→P.546)
Paper to Prepare
Rolls
Sheets
544 Adjustments for Better Print Quality
An unused roll at least 10 inches wide
Standard Adj. : One sheet of unused paper of at least A4/Letter size
Advanced Adj. : Five sheets of unused paper of at least A4/Letter size
(or one sheet when using A2 or larger, or two sheets when using A3
loaded lengthwise)