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and
more
about Sharp
PC-1500
at
http://www.PC-1500.info
Bobbin Gear
Pulley
Support
Base (Lettt
Idle Gear
Stepping Motor
Slide
Unit
Fig. 1
•
Step Angle and Minimum Movement Pitch
'
---
0
Pulley
SUJpport
B<:ite (A. ht)
Wi
re
The reduction ratio
between
the stepping motor and bobbin gear is
I
:9.01
,
and for each
stepping
motor pulse
(18°/360),
the slider unit, that is, penX direction movement, is 0.2mm. The motive
power
ls
transmitted to the bobbin gear and slider unit by a wire, and the wire tension is main-
t;iined by a coil
spring.
3.
Y Drive Mechanism
(Paper Feed
Mechanism)
Section
The
Y
·direction
drive mechanism
consists
of
the
Y
stepping
motor,
idle
gear,
rubber
roller
unit,
paper
holding
roller (fight)
and paper
holding
roller
(left). The
reduction ratio between the Y
step
ping
motor (called the Y
motor
below) and rubber
roller gear
is
l
:7.86.
As is the case
with
the X direc-
tion,
the
rubber roller movement
per pulse of
the
Y
motor,
that
is,
the
Y
diteclion movement
quantity
of
the
recording
paper,
is
0.2mm.
Paper Holding Roller
(Left)
Fig. 2
5
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