I have 2 Epsons here printing from a proprietary dos-based application from 3 PCs, 2 of them connected directly and 1 more via mapped lpt1. The trouble is in how both of the printers handle paper: we print on carbon single sheet stacks of 4 pages (rather on the thin side); what happens is this: the 880 feeds the paper 1 line too high or too low when sending multiple-sheet print jobs. The person who operates the printer has to repeatedly manually adjust the knob during printing so that the printouts looks correctly. The 980 behaves in a similar way in that it sometimes misalignes the spot where the print should start, but here it happens on page one (always starting way too low here, some 10-15 lines). Some other times it would print page one normally but then start printing the top of the next page at the bottom of the previous one. The 980 only exhibits this problem when printing from the PC connected directly, and never from the PC connected remotely.
I've checked the paper thickness setting, the drivers, the driver settings and everything seems to be fine. Both printers are new (couple of months old) but exposed to pretty heavy workload.
Any ideas much appreciated.