Dual 1225 - Tonearm Guide Mechanism; Tonearm Lift (Cue Control)

Fig. 17 Tonearm guide mechanism
199 173 132 A 193 180 223 202 212 245
Tonearm
Lift
(Cue
Control)
The
tonearm
lift
permits
the
tonearm
to
be
set
down
on
the
record
safely
at
any
desi-
Ted
point
outside
the
shut-off
area,
Moving
the
tonearm
lift
handle
(44)
for-
ward
causes
lift
cam
(235)
to
rotate.
This
movement
is
transmitted
via
positioning
slide
(212)
to
the
lift
pin
which
then
ralses
the
tonearm.
Fig.
12
Tonearm
lift
(tonearm
raised)
44 235 236 212
Tonearm Guide Mechanism
A guide groove located on the underside of
the main cam (193) controls the automatic
lift and set-douwn of the tonearm as the
cam rotates through 360. Tonearm lift and
lowering are controlled by main lever (223)
and lift screw (249). Horizontal movements
are controlled by the main lever (223) and
the segment (240).
Automatic tonearm set-down is designed for
12", and 7" records and is coupled to the
platter speed selector. Set-—down points
are determined by the spring pin of seg-
ment (240) contacting the positioning slide
ee which is. only raised by the main lever
223) during the change cycle and thus mo-
ves within reach of the spring pin fitted
on the segment. On completion of set—down
or change cycle (tonearm sets down on the
record) the positioning slide (212) is
released again and returns to its normal
position. It thus moves out of reach of
the spring pin permitting the tonearm to
move horizontally without hindrance while
playing the record.
After moving the tonearm (by hand) to the
desired spot on the record the tonearm lift
handle is tapped lightly (to the rear) to
release the mechanism.
The positioning slide (212) is thus relea-
sed and the tonearm descends slowly, con-
trolled by the viscosity damped lift pin.
The height of the stylus above the record
can be varied from zero to 6 mm by turning
adjuster screw (43). Turning to the right
increases the height, turning to the left
reduces the height.
251 43 249 245