FRIDEN STW - Page 44

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44
FRIDEN
CALCULATING
MACHINE
CO.,
INC.
615-60
MODEL STW
PROCEED
WITH
TEST
AS
FOLLOWS
1,
With
Carriage
in
First
Position,
make
the
De-
tent
and
Pick-up
Checks
explained
above
an
ell
Dials
from
#12
through
#20.
2.
Trip
Clutch
and
crank
machine
three
-
quart-
ers
of
a
revolution(blank
operation).
Now,
again
make
Pick-up
Check.
Dials
mustnot
show
move-
ment.
Restore
machine
to
Home
Position.
3,
While
watching
point
of
contact
between
Block-
out
Finger
A
on
Add-Subtract
Gate
and
Disen-
gaging
Arm
B
(see
Adjustment
145),
rock
Add-
Subtract
Gate
back
and
forth.
Blocking
Finger
A
should
be
very
close
but
should
not
tend
to
han
on
Disengaging
Arm
B.
4,
Shift
Carriage
to
7th
position.
Repeat
Test
#3,
Also
Detent
Check
on
#20
Dial.
5.
Shift
Carriage
to
last
position.
Turning
Shift
Gear
by
hand,
position
Carriage
half
way
between
last
position
and
next-to-lest
position.
Repeat
Detent
and
Pick-up
Checks.
See
Adjustment
144.
6.
Try
transferring
Minus
and
Plus
in
all
Car-
riage
positions
with
|
in
first
column
of
‘Main
Key
Board.
If
any
Dials
tend
to
spinor
not
trans-
fer
correctly,
first
check
Carriage
Adjustments
and
Geneva
clearances
and,
in
particular,
#12
Geneva,
DO
NOT
ATTEMPT
ANY
ADJUSTMENT
TO
IDLER
GEAR
SECTION
UNTIL
ALL
OTHER
ADJUSTMENTS
HAVE
BEEN
CORRECTED.
7.
Transfer
9's
into
Carriage
and
clear
under
CHAPTER 9.
One
of
the
most
important
functions
in
servicing
a machine
is to sea
that
it is PROPERLY
lubri-
cated.
Many
machine
troubles
can
be
traced
to
poor
Inbrication,
Too
much
and
too
little
are
both
bad
conditions
and
are
to
be
avoided.
Too
much
lubrication
may
create
a
condition
causing
sluggish
action
of
parts
actuated
by
springs
and,
in addition,
serves
to collect
dirt
and
dust.
Use
only
one
drop
of oil
in a bearing
point,
as
this
is
sufficient
for
proper
lubrication
and
is
all
the
bearing
will
retain.
Use
grease
sparingly
to pre-
vent
smearing
adjacent
parts
which
may
become
sluggish
if grease
is allowed
to get
on
them,
Allmoving parts of the machine should have some
lubrication except where adhesion is a factor.
Some parts should be lubricated very sparingly
or not at ail, because oil may create a suction be-
tween parts that slide on flat surfaces. When
thie condition is found, the pacts involved should
be cleaned with cleaning uid and left ta dry.
OIL: A light non-gum-forming oilis recommend-
SFECLAL FEATURES
power.
If
trouble
develops
here,
see
Adjustments
145
and
146.
8.
Transfer
9°s
in
and
out
of
Carriage,
using
Negative
Multiply
followed
by
Accumulative
Mul-
tiply
under
power.
Do
this
a
number
of
times.
9.
Try
Division.
With
1
in
first
column
Main
Key
Board,
shift
Carriage
to
extreme
right
and
di-
vide
across.
If
Dials
to
the
left
of
the
Blockout
point
tend
to
flicker
or
attempt
te
transfer,
see
Adjustment
148.
NOTE:
The
following
adjustments
also
affect
Complete
Transfer,
#12
Geneva
should
be
checked
for
clearance
to
Cam
on
#6
Actuator.
Keep
adjustment
close,
not
over
.002
to
.003
clearance.
Carriage
Shift
Rack
adjustment
should
be
kept
close
for
a
perfect
mesh
of
Add-Subtract
Gears
with
Preduct
Dial
Gears,
A
little
to
the
right
or
left
may
affect
Complete
Transfer
Action.
A
loose
Carriage
affects
Complete
Transfer.
To
test
the
Carriage
Shift
Rack
adjustment,
ap-
ply
pressure
to
the
Carriage,
both
to
the
right
and
then
to
the
left
while
transferring
9'sinand
out
of
the
Accumulator
Dials.
Dothis
inall
Car-
riage
Positions.
If
the
Dials
tend
to
falter
or
fail
to
transfer
properly,
the
Shift
Rack
should
be
ad-
justed
slightly
in
the
direction
indicated
by
this
test,
That
is,
if
failure
is
noted
when
pressing
the
Carriage
to
the
left,
the
Shift
Rack
should
be
moved
slightly
to
the
left
to
move
the
Car-
riage
to
the
right.
:
LUBRICAT:ON
ed,
There
are
several
good
oils
on
the
market.
Most
of
the
major
oil
companies
distribute
goad
oils
developed
for
lubricating
small
machines
andinstruments.
Many
of
the
so-called
common
household
oils
are
not
recommended,
as
they
are
net
sufficiently
refined
to
remove
gums
and
resins.
GREASE:
White
petroleum
jelly
has
been
found
to
be
very
satisfactory
and
can
be
purchased
in
handy
containers
for
the
Service
Kit.
Only
the
following
points
should
be
greased:
Actuator
and
Drive
Shaft
Gears
(oilthe
bearings):
Division
Control
Cams;
Centralizer
(a
MUST);
Sensing
Finger
Cam;
Drive
Pinion
Gear
(spar-)
ingly);
Counter
Oscillator
Cam;
Rocker
Carn
and
Stud.
You
may
find
a
few
other
points
where
grease
has
been
used
in
the
manufacture
of
the
machine,
but
aiter
the
initial
operating
period
of
the
machine,
oil
will
serve
as
well
or
better
for
lubrication.