HP Designjet T620 Printer series - Manual (Page 130)

Line lengths are inaccurate
If you have measured your printed lines and find that the lengths are not sufficiently accurate for your
purposes, you can try to improve line length accuracy in the following ways.
1. Print on HP Matte Film, for which your printer's line length accuracy is specified. See Functional
specifications on page 158 .
Polyester film is about ten times more dimensionally stable than paper. However, using film that is
thinner or thicker than HP Matte Film will reduce line length accuracy.
2. Set the Print Quality slider to Quality.
3. Maintain the room at a steady temperature between 10 and 30°C (50 and 86°F).
4. Load the roll of film and let it rest for five minutes before printing.
5. If you are still not satisfied, try recalibrating the paper advance. See Recalibrate the paper
advance on page 119 .
The whole image is blurry or grainy
1. Check that the paper type you have loaded corresponds to the paper type selected in the front
panel and in your software. To check on the front panel, use the
View loaded paper key .
2. Check that you are printing on the correct side of the paper.
3. Check that you are using appropriate print-quality settings (see Printing on page 45 ). In some
cases, you can overcome a print-quality problem merely by selecting a higher print-quality level.
For instance, if you have set the Print Quality slider to Speed, try setting it to Quality. If you change
the print-quality settings, you may wish to reprint your job at this point in case the problem has been
solved.
4.
Go to the front panel and select the Ink menu icon , then Printhead information to see the
printhead alignment status. If the status is PENDING, you should align the printheads. See Align
the printheads on page 142 . After alignment, you may wish to reprint your job in case the problem
has been solved.
5.
Go to the front panel and press the View loaded paper key to see the paper advance calibration
status. If the status is DEFAULT, you should perform paper advance calibration: see Recalibrate
the paper advance on page 119 .
ENWW Line lengths are inaccurate 127
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