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Banding
Banding.

Symptons:

Random dark or light bands in area fills.

It is normally caused by cartridge problems like blocked, weak or misdirected nozzles. It could also de caused by a faulty electrical contact.

There are two different cases of banding:

1- Negative banding. This means that consecutive swaths overlap each other, creating dark bands.

2- Positive banding. This means that consecutive swaths do not touch, thus leaving a small gap between each other. This phenomenon creates white (or lighter) bands.

The error specification is +1.1 mils and - 1.7 mils, this is a range of 2.8 mils.

To see these errors on the Print Quality Plot, check the right part of the plot to identify the following drawings.

Corrective Actions.

1- Clean cartridges.

2- Swap cartridges in their chutes.

3- Replace the cartridges.

4- Perform accuracy calibration.

5- Replace encoder strip.