Im seeing little dimple marks on my prints running along the direction of the paper movement. What are these?
These are “pizza wheel marks” caused by the little spoked wheels attached to the ejection rollers of the 3800. This ejection roller system is active when the Auto Sheet Feed or Rear Feed is used, but not when the Front Feed is used. The two main purposes of the pizza wheels are (1) to allow borderless printing at the bottom (i.e., trailing) edge of the print, and (2) to cause multiple prints to emerge neatly stacked when using the Auto Sheet Feed. The problem is that the pizza wheels dig into the printing side of the paper surface as the sheet emerges from the printer. This leaves little marks running up and down the surface of the print, perpendicular to the direction of the print head movement. Papers with softer surfaces (e.g., the Innova FibaPrint papers) are more susceptible to this problem. Are the marks really noticeable in practice? That depends. First of all, I’ve only ever seen the marks on PK papers, not MK papers. So I don’t worry about it at all when printing on MK papers
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