HP Indigo W7200 Charge Roller -- CA393-00080 Rev 07 - Page 7

Removing the sticky residue and dirt

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Removing the sticky residue and dirt Clean the rollers with a lint-free wipe soaked in water or with the water wipes that come with each new charge roller. This will return the rollers to an almost-new condition. Minimizing the sticky residue and dirt Minimize the sticky residue and dirt. Under normal working conditions, the sticky residue and dirt will impact the print quality only after 100 - 150 K impressions. If you have to clean the rollers more often than every 100 - 150 K impressions, do the following: 1. Make sure that the process parameters are correct: a. Recalibrate the electrometer. Replace it if necessary. b. Check the ILS calibration. c. Check the ink conductivity level. d. Check the Substrate Properties settings for optical density and coating type. e. Check the color adjustment. f. Check the PIP temperature. g. Check the ITM temperature. h. Check the first transfer settings. 2. Reduce imaging oil fumes: a. Calibrate the cleaning station imaging oil flow. b. Reduce cleaning station dripping, which will decrease the quantity of imaging oil fumes. c. Make sure that the ITM temperature is correct. d. Increase the ozone suction efficiency: replace the filters and clean the pipe. e. Check the utility door sealing. Clean the condenser coils. This will improve the efficiency of recycling the imaging oil fumes. 3. Reduce the ink accumulation on the PIP. a. Check the coating color on the balancing roller to detect which color generates the most ink accumulation on the PIP. b. Make sure that special colors are calibrated correctly. c. Check if accumulation increases when working with a non-standard substrate. d. If the cleaning station sponge roller is dirty or damaged, replace it. e. Calibrate the ink density. f. Calibrate the ink conductivity. Removing the sticky residue and dirt 5

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Removing the sticky residue and dirt
Clean the rollers with a lint-free wipe soaked in water or with the water wipes that come with each new charge
roller. This will return the rollers to an almost-new condition.
Minimizing the sticky residue and dirt
Minimize the sticky residue and dirt.
Under normal working conditions, the sticky residue and dirt will impact the print quality only after 100 - 150
K impressions.
If you have to clean the rollers more often than every 100 - 150 K impressions, do the following:
1.
Make sure that the process parameters are correct:
a.
Recalibrate the electrometer. Replace it if necessary.
b.
Check the ILS calibration.
c.
Check the ink conductivity level.
d.
Check the Substrate Properties settings for optical density and coating type.
e.
Check the color adjustment.
f.
Check the PIP temperature.
g.
Check the ITM temperature.
h.
Check the first transfer settings.
2.
Reduce imaging oil fumes:
a.
Calibrate the cleaning station imaging oil flow.
b.
Reduce cleaning station dripping, which will decrease the quantity of imaging oil fumes.
c.
Make sure that the ITM temperature is correct.
d.
Increase the ozone suction efficiency: replace the filters and clean the pipe.
e.
Check the utility door sealing. Clean the condenser coils. This will improve the efficiency of recycling
the imaging oil fumes.
3.
Reduce the ink accumulation on the PIP.
a.
Check the coating color on the balancing roller to detect which color generates the most ink
accumulation on the PIP.
b.
Make sure that special colors are calibrated correctly.
c.
Check if accumulation increases when working with a non-standard substrate.
d.
If the cleaning station sponge roller is dirty or damaged, replace it.
e.
Calibrate the ink density.
f.
Calibrate the ink conductivity.
Removing the sticky residue and dirt
5