The occurrence of PASS tracks is closely related to the coordination among equipment modules, consumable characteristics, and parameter settings, based on the core components of inkjet equipment (printhead, control system, ink, mechanical/electrical systems, etc.). Specific causes are as follows:
I. Mechanical and Electrical Factors (Related to Equipment Mechanics) Insufficient paper feed precision:
Issues like paper jam in the feed mechanism or uneven step distances cause unstable paper transport, leading to positional misalignment during multi-pass overlay. Calibration accuracy deviation: Improper printhead alignment or abnormal scan path calibration directly impacts the overlay precision of multi-pass patterns, resulting in visible boundary lines.
II. Control System (Board) Factors (Related to Mainboard/Control Module) Stepping Calculation Error: Inaccurate calculations by the mainboard regarding paper travel distance or printhead scanning increments cause mechanical actions to lag behind commands, forming regular stripes. Feathering Parameter Abnormality: Deviations in edge transition processing result in stiff pattern edge overlays between passes, making traces prominent. III. Ink Factors (Related to Ink Consumables) Unreasonable Density:
Excessively thick ink clogs nozzles, while excessively thin ink spreads unevenly, causing abnormal ink output in localized areas; Saturation Abnormalities: Imbalanced color density creates layering effects during overprinting due to ink volume discrepancies; Inappropriate Drying Speed: Excessively fast drying causes ink breaks, while excessively slow drying leads to smudged overprints, disrupting pattern uniformity.