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CT-7R/6R
1. MECHANICAL
DESCRIPTIONS
1.1
Mechanism Operation
The various mechanical sections of the recorder
are operated
using the capstan motor to provide
the driving force. The various modes are activated
by solenoid L and R, and these are controlled by
commands from CPU PD6006.
Both
the
capstan
and
reel-motor
are
direct-
drive motors
fitted with
a Hall sensing element.
Reel-motor
L and reel-motor R (hereafter called
RM L, RM R) are used exclusively for tape take-up
in the FF, REW, PLAY,
and REC/PLAY
modes.
The direction of rotation and rotational speed of
these
motors
are controlled
by commands
from
CPU PD6006.
The right side capstan motor is the DD type, and
the left side capstan motor is belt-driven by the
right side-motor.
A sub-rotor
acts as the actual
capstan. (Refer to Fig. 1-1).
The mechanism forming the right and left-hand
side
of
the
unit
is essentially
symmetrical
in
configuration,
and in forward
and
reverse (here-
after
abbreviated
FWD,
REV)
operations,
each
side
acts
together.
This
description
covers
the
mechanical operations for FWD movement.
= Basic Operations of the Mechanism
The mechanism
assumes three different states:
STOP, PAUSE,
and PLAY. Consequently, since it
can travel in the FWD
and REV
direction, there
are a total of six states possible. There is also a
direction
operation
for switching between
FWD
and
REV
travel.
Transition
between
the
FWD
and REV
state will be described using only one
example.
When
the
mechanism,
presently
in the FWD-
PLAY mode, is switched to the REV-PLAY mode,
a direction operation is required, then the mecha-
nism will make the transition following the steps
listed below. (Refer to Fig. 1-2).
Solenoid L,
Solenoid R
ans |
Fig. 1-1
Mechanical construction
STOP state
STOP,
DIRECTION
(DIR)
PAUSE,
PLAY/PAUSE ,
|
PAUSE state
REC-PLAY / PAUSE,
FF,
REW.
PLAY state
PLAY,
REC/PLAY.
Fig. 1-3.
Mechanism mode transition flow and modes
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