Seiko I Infotech IP-6600 Maintenance Manual page 310

1) Paper feed unit
The paper feed unit can perform 2-way feeding of roll paper and cut sheets. The paper
feed unit can be operated from the front.
• Remove roller paper and set cut sheets according to the guide line on the front paper
guide.
• The Pressure roller up/down lever is used to release the pressure roller grip when
roll paper and cut sheets are set. The lever sensor is a photosensor located near the
nip release lever on the right side frame to detect lever opening/closing. If the nip is
released, paper cannot be transported. Therefore, if nip release is detected, the
machine operation stops. If the nip is detected again, paper may be set again, it is
used as a signal that performs a paper detection sequence.
• Roll paper or cut sheets are specified from the operation panel. The type of media is
also specified from the operation panel.
• The paper feed sensor is a reflective type photosensor installed on the paper feed
controller. It detects paper by reflection over its surface so that the engine controller
firmware recognizes the paper condition.
2) Drive unit
The drive unit consists of an X motor (paper feed motor), a grip roller, a pressure roller
and a lever. The paper feed motor is a DC servo motor for paper feeding, which is
controlled by the software servo control unit of the engine controller. When this motor
is run, the grip roller turns and transports the paper gripped by the pressure roller. The
pressure roller is gripped or released by the lever.
3) Platen and suction fan
When paper is transported to the platen, it stucks to the platen by sucking air through
the holes in the platen to prevent its lift and contact with the print heads.
There are three suction fans. Each of the three fans can be driven independently of
each other according to media width.
The sucked air is exhausted from the bottom of the machine.
4) Paper guide, paper delivery sensor
The paper guide is a guide plate that is curved to prevent bending of the printed paper
on the platen. The paper delivery sensor is a reflective type photosensor installed on
the paper outlet, which detects paper by reflection over its surface so that the engine
controller firmware recognizes the paper condition.
5) Interlock switches
The four interlock switches are installed on the rear cover to detect cover
opening/closing. When the cover is opened, the interlock switches turn OFF to forcibly
turn OFF the +35 V and +24 V power of the power supply unit. The carriage and other
drive units are forced to stop.
SIIT CONFIDENTIAL
Section 9 Operations
9-3