2-4
Operation Principles
Rev. A
Confidential
This printer uses a 4-phase bi-polar stepping motor driven by 24 V voltage controlled 2-2 phase
excitation. The maximum drive frequency of 2-2 phase excitation is 1200 pps. [pps: pulses per
second]
Paper Feed Mechanism
This mechanism consists of the paper feed mechanism and the platen-open mechanism.
Paper feed mechanism
The paper feed mechanism consists of the
platen
(paper feed roller) and the
thermal head
.
When the
motor, paper feed, receipt, B
rotates counterclockwise as viewed from the shaft,
the gear train transmits the motion to the
platen
which rotates in direction A.
Figure 2-4 Paper feed mechanism
Paper feed operation during printing
The
platen
presses the thermal paper against the
thermal head
with a constant force. When
the
platen
rotates in direction A, the thermal paper advances in direction B.
Figure 2-5 Paper feed operation during printing
thermal head
platen
motor, paper feed, receipt, B
A
B
platen
thermal paper
A
Содержание EU-T532
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