I am printing with a 9880 recently purchased from an an independent Epson service tech that has a new print head and pump cap station.
The printer is printing well, but I occasionally get tiny black marks on the print that occur in two rough lines about one third in on the right and left sides of the carriage on 36" wide paper. The marks are 1/4" to 1/2" tiny, inconsistent dot patterns and not the ink blotches I have seen from other Epson printers.
Typically I would guess the marks are caused ink build up on the print head, but the Epson tech says there is no way ink could have built up on a brand new print head and capping station. He said I should set the Platten Gap wider.
I do see a little ink build up on the bottom of the wiper blade and pump cap station, but I don’t know whether it is a typical amount.
My question is, is Platten Gap a consistent dimension from machine to machine? In other words, might a standard Platten Gap on one 9880 be slightly different from another? I print with Photo Rag, which specs say requires a Standard Platten Gap, but given possible inconsistencies between printers, might a Wide Platten Gap be normal or the “standard” for my machine?
Is there something else that could be causing the marks?