Fig.
13
Anti—skating
force
Anti
-
Skat
ing
Device
a)
Anti-skating
force
0-set-
ting.
No
compensation
of
the
skating
force
ta-
kes
place
as
a
result
of
the
action
of
the
tension
spring
(214)
at
the
fuc-
rum
of
the
tonearm.
b)
Anti-skating
mechanism
set
to
"1.5"
on
the
scale
for
elliptical
styli.
Tone
-
arm
on
tonearm
rest.
The
tension
spring
(214)
produces
the
anti-skating
force
vvhich
is
transmit-
ted
to
the
tonearm
via
the
segment
(211).
The
compression
spring
presses
the
skating
lever
(207)
against
the
plate
cam
(65).
cl
As
"b"
but
tonearm
abo-
ve
platter.
Defeet
Stylus
slips
out
of'
playing
groove
Vertical
tonearm
mo—
vement
shows
resi—
stance
during
set—
down
215
194
214
65
208
Cause
a)
c
d)
e)
211
207
Tonearm
is
not
ba—
lanced
Tonearm
tracking
force
is
too
low
Anti—skating
set—
ting incorrect
Stylus
tip
vorn
or
chipped
Excessive
bearing
friction in
tone
—
arm
bearing
f)
Steel
ball
(166)
of
shut—off
bar
missing
a)
Bearing
friction
excessive
b)
Lift pin
(185)
sticks in
guide
tube
The
geometrical
skating
force
acting
on
every
tonearm
is
eliminated
by
means
of
a
precision
ant—skating
device.
The
skating
force
is
dependent
on
the
geometry
of
the
tonearm,
on
the
tracking
force
and
on
the
tip
curvature
of
the
stylus of
the
pick
—up
cartridge.
The
pull
on
the
tonearm
to
the
center
of
the
platter
caused
by
the
skating
effect
leads
not
only
to
troublesome
jumping
of
the
tonearm
when
lowered
manually,
but
also
the
uneven
flank
loading
of
the
sound
groove
with
the
resultant effects
which
haue
to
be
eliminated
on
a
hifi
record
player
with
the
aid of
the
anti—skating
device.
Turning
the
Knurled
(63)
of
the
anti—skating
device
on
the
mounting
plate
moves
the
asym—
metrical plate
cam
(65).
This
plate
cam
has
two
different
curves
which,
according
to
use
of
the
red
anti—skating
scale
for
the
dif—
ferent styli
as
well for
CD
4
pick
—up
car—
tridges
move
the
skating lever
(207)
from
its neutral position
and
transmit
the
coun—
ter
force
to
the
tonearm
by
means
of
tension
spring
(214)
Optimum
adjustment
is carried
out
at
the
works
for styli with
a
tip
radius
of
15
+
2
µm
(conical)
and
5/6
x
18/22
µm
(ellip—
tical)
as
well
as
for
CD
4
pick
—up
car—
tridges. Alteration
can
only
be
carried
out
with
the
aid of
the
Dual
Skate
—O
—Meter
and
test
record
L
096
and
should
only
be
done
by
an
authorised
service
station.
Remedy
g)
Balance
tonearm
b)
Check
tonearm
balance,
adjust
tracking
force
to
the
value
stated
by
the
car—
tridge
manufacturer
c)
Correct
anti—skating
setting
d)
Renew
stylus
e)
Check
tonearm
bearings.
Both
bearings
must
haue
slight, just perceptible play.
The
adjustment
of
the
vertical
bearing
should
only
be
carried
out
with
the
left—
hand
bearing
screw
(grub
screw
56),
that
of
the
horizontal
bearing
by
means
of
grub
screw
(44).
The
horizontal
bearing
is correctly
adjusted
when
at
anti—skat—
ing setting "0.5"
(onearm
previously)
balanced
exactly)
the
tonearm
slides in
without
resistance.
f)
Renew
steel ball
(166)
a)
Eliminate
friction
by
adjusting
the
bea—
ring
screw
(grub
screw
56)
and
check
ba—
lance
b)
Remove
lift
tube
assembly
as
described
on
page
10.
Remove
guide
(181)
on
lift
pin
(185)
Remove
tension
spring
(184).
Withdraw
lift pin
evenly
with
"Wacker
Silicone Oil
AK
500
000".
Reassemble
com—
ponents.
Clean
parts
from
Silicone Oil,
if
cecessary.
8
