Akai M8

Fig. 1
y
TRANSPORT
MECHANISM
Driving of Capstan
Figure 1.
(A) Motor
{B) Driving Belt (flat belt)
(C) Capstan
(D) Flywheel
High-speed
rotation
of
Motor
(A)
is
reduced
by
Driv-
ing
Belt
(B)
and
transmitted
to
Capstan
(C),
which
is
connected
tc
Flywheel
with
ample
inertia
and
enables
rating
rotation
by
absorbing
minor
rotation
distortion
of
.
motor
itself.
(see
Fig.
1)
Capstan
Rotation
606
r.p.m.
at
7-14"
(19
m.}
per
sec,
303
r.p.m.
at
3-34”
(9.5
cm)
per
sec.
151.5
r.p.m.
at
1-%*
(4.75cm.)
per
sec.
Motor
Rotation
3,000
to
1,500
r.p.m.
at
50
cps.
.
'
3,000
to
1,800r.p.m.
at
60
cps.
Driving of Pinch Roller
Put
tape
between
rotating
capstan
and
pinch
roller
and
‘push
pinch
roller
against
capstan,
this
will
transport
the
tape
at
rated
speed.
The
appropriate
pressure
of
Pinch
roller
at
this
time
is
between
1,000
to
1,150
grams
at
the
tape
speed
of
7-14”
(19cm.)
per
second.
Recording and Play Back
Tum
the
RECORD,
PLAYBACK
knob
{A}
to
"PLAY"
position,
and
pinch
roller
presses
hard
against
capstan
to
move
tape
at
the
rated
speed.
Aiihe
same
time,
idier
(Bj
moves
between
Motor
Bushing
(C)
and
the
Take-Up
Reel
Spindle
{D)
te
transmit
the
motor
rotation
to
(D)
so
that
the
tape
is
moved
and
wound
on
the
take-up
reel.
The
Take-Up
Reel
Spindle
Base
is
made
up
of
two
plastic
rollers
(1
and
2)
with
a
clutch
felt
in
between.
The
Idler
is
rotating
the
plastic
roller
(2)
below.
There-
fore,
the
tape-winding
friction
is
adiusted
by
the
slipping
of
the
felt
to
enable
rated
winding
of
the
tape.
On
the
other
hand,
the
Supply
Reei
Spindle
(Hj
has
a
Brake,
roller
(E)
hung
on
the
Plastic
Roller
(4)
below
which
provides
appropriate
back
tension
by
the
clutch
felt
slipping
to
the
rotation
of
the
Pulley
(3)
above.
To prevent accidental erasure, the Record Interlock
Button
(F)
must
be
depressed
before
the
RECORD,
The
Safety
device
(G)
is
depressed
to
enter
the
record
mode.
(See Figures 2 and 3)
Braked Rotation Slipping Rotation
o SOF
f
Fig. 3