Grain Direction; Sheet Trimming; Sheet Size; Paper Transport Subsystems - HP Indigo press 3050 User Manual

Duplex placement accuracy
Point on front
Figure 11-1. Duplex placement accuracy

Grain direction

For duplex or simplex printing, use long-grain sheets for paper types lighter than
170 g/m
170 g/m
sheets. For paper types heavier than 200 g/m

Sheet trimming

Before you load the substrate on the feed tray, make sure that the sheets are trimmed
correctly and are not stuck together. If necessary, trim the stack on two axes (top and left
edges), and then fan the sheets before using them.
Note Make sure the blade is sharp. Using a blunt blade will cause paper jams.

Sheet size

When using a new paper stack, verify that the sheet size is identical to the size defined in
the substrate list. Make sure that the size of the sheets used in the main tray and the
secondary tray are identical.

Paper transport subsystems

Paper feed unit

The paper feed unit consists of the paper elevator, a set of blowers, suction fingers, and
sheet separators. The main function of this subsystem is to separate a single sheet from
the paper stack and feed it to the paper transport system.

Feed conveyor

The subsystem transports the sheet from the paper feed unit to the grippers. It ensures
correct alignment of the sheet before feeding it to the paper grippers.
ENWW
0.8 mm (0.03 inch)
0.4 mm
(0.015 inch)
2
(115 lb text/63 lb cover). For paper types between
2
(115 lb text/63 lb cover) and 200 g/m
Range of point on back
0.8 mm
(0.03 inch)
Maximum back-to-front point
deviation—0.4 mm (0.015 inch)
2
(74 lb cover), use short or long grain
2
(74 lb cover), use short grain sheets.
Paper transport subsystems 151