Drum period
The repeat interval of a drum-surface defect in the printed output, equal to the drum's circumference; measured in millimetres to identify the component and, combined with defect morphology, to identify a specific printer unit.
The repeat interval of a drum-surface defect in the printed output, equal to the drum's circumference; measured in millimetres to identify the component and, combined with defect morphology, to identify a specific printer unit.
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