Printer Mechanism Components; Printer Mechanism Operating Principles; Transport Mechanism; Carriage Feed Gear Train - Epson TM-U375 Technical Manual

CONFIDENTIAL
2 . 1 PRINTER MECHANISM
COMPONENTS
The printer mechanism of the TM-U375 consists of the
following component mechanisms:
• Transport
• Printing
• Detection
• Paper feed
• Ribbon feed
• Paper roll take-up
These components are described in detail in the following
sections.
2 . 2 PRINTER MECHANISM
OPERATING PRINCIPLES

2.2.1 Transport Mechanism

Carriage feed gear train

The carriage feed gear train consists of the parts shown in
Figure 2-1. The carriage is mounted on the belt and moves
to the left or right, depending on whether the carriage motor
rotates forwards or backwards.
Figure 2-1. Carriage Feed Gear Train

Paper feed gear train

The paper feed gear train consists of the parts shown in
Figure 2-2.
Gear train for feeding the paper roll
When the paper feed motor set drives the motor gear so
that it rotates in the direction of
transferred to the intermediate gear, intermediate drive
gear, and intermediate gear B. Each gear rotates in the
direction of the
rotates in the direction of
A, the rotational force is
. The J paper feed roller shaft set then
B.
Figure 2-2. Gear Train for Feeding the Paper Roll
Gear train for feeding validation paper
When the paper feed motor set drives the motor gear so
that it rotates in the direction of
gear rotates in the direction of the
intermediate gear. The intermediate holder gear then
rotates, and the intermediate holder roller set and the
intermediate drive roller set rotate in the directions of
and C, respectively.
In addition, the rotational force transferred to the C feed belt
from the intermediate drive gear causes the V feed roller set
to rotate in the direction of D.
Figure 2-3. Gear Train for Feeding Validation Paper
A, the intermediate drive
by means of the
B
2-1