Panasonic KX-W1500

Carrier Spacing Motor
Carrier Cable.
Magnet Shutter
Magnet
Home Detecting Lever
Ribbon Feed Gear
TWX
Sensor
a
SS)
(Reed Switch)
Drive Cam Ribbon Feed Motor
4.2.7 Carrier Spacing
Carrier
movement
is
provided
by
a
stepping
motor
controlled
by
the
Logic
Board.
Motor
rotation
is
trans-
mitted
via
a
cable
and
pulley
to
the
Carrier,
changing
the
rotational
motor
movement
to
horizontal
Carrier
movement.
The
Carrier
Motor
is
a
stepping
motor
which
operates
in
7.5°
increments
for
each
pulse
re-
ceived.
Each
7.5°
step
of
the
Motor
provides
carrier
movement
of
1/120”
to
the
left
or
right,
requiring
the
following
number
of
steps,
or
pulses,
per
space,
de-
pending
on
pitch:
15 pitch= 1/15” 8 steps
12 pitch= 1/12” 10 steps
10 pitch= 1/10” 12 steps
4.2.8 Carrier Home Sensor
The
chassis
is
equipped
with
a
limit
Sensor
to
notify
the
CPU
when
the
Carrier
approaches
its
home
posi-
tion,
the
Home
Detecting
Lever
is
activated
by
the
Card
Holder
and
the
Magnet
Shutter
mounted
on
the
top
of
the
Home
Detecting
Lever
turns
the
Reed
Switch
off,
generating
the
signal
and
indicating
the
carrier
home
position
to
the
CPU.
4.2.9 Ribbon Feed
Ribbon
Feed
Drive
is
provided
by
a
bi-directional
DC
motor,
which
also
provides
Correction
Tape
Lift
and
Feed,
depending
on
which
direction
the
motor
is
in-
itially
activated.
The
home,
or
starting
position
of
the
motor
is
determined
by
a
magnetic
sensor
which
senses
the
location
of
the
magnet
affixed
to
the
inner
surface
of
the
Drive
Cam.
During
a
character
printing
operation,
the
Motor
is
energized
and
turns
the
Drive
Cam
in
a
counterclock-
wise
direction
(view
from
the
left),
until
the
magnet
passes
its
sensor
(Reed
Switch).
This
one
rotational
~
movement
of
the
Cam
Feed
Gear,
which
then
adv-
—-aA—
ances
the
Ribbon
Feed
Gear
and
the
Ribbon.
A
Stop
Pawl
prevents
reverse
movement
of
the
Feed
Gear.