Dual 1229 Q - Motor and Drive System; Motor Pulley Selection Guide

Fig.
2
Motor
suspension and
turntable
platter
drive
96
104
Motor and
Pulley
134
131
133 156
Power for the turntable platter and the
changing mechanism is supplied by a four—pole
Dual continuous pole synchronous motor su—
spended by radially located elastic mounts
and having a very small stray magnetic field
and little
vibration. The
speed of
the motor
is
independent of line voltage, temperature
or load variations. Speed is dependent on,
and proportional to power—line frequency.
The motor is adapted to 50 or 60 cycle (Hz)
power—line frequencies by the correct choice
of motor pulley.
Motor
pulley for 50
Hz
operation:
Motor
pulley
for 60 Hz
operation:
Part.—No.
218 275
Part.—No.
216 276
Fig. 3 Motor field connections
115
121
188
The motor pulley (115)
is fastened to the
motor shaft by a
setscrew. When you change
pulleys,
be sure that the new pulley is set
at the
correct height (see
page 6).
The
turntable
platter is driven
by the id—
ler wheel (131),
which, to
prevent damage
to its
friction
surfaces, is
automatically
disengaged when
the unit is
shut off.
Set—
ting
the turntable
speed to 33
1/3, 45 or
78
rpm is done
by raising
or
lowering the
idler
to bear
against the
proper
step of
the motor
pulley.
Upon
actuation
of the
switch (6),
the
switch segment
(102)
rotates. This
causes
the
lever (134)
fitted
into a slot on
the
segment to move
vertically. The
drive wheel
(131)
carried
on the
swinging arm
(133) is
then
lifted off
the
motor
pulley, moved
and
replaced on
the motor
pulley
step cor—
responding to
the
selected
speed.
220-240V
4
110-125V