EasyManua.ls Logo

Merrow Class 70 - Merrow Class 70 Threading; Class 70 Threading Diagrams and Tension

Merrow Class 70
24 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
CLASS
70
INSTRUCTION
SOOK
35.
Steps
to
Setting
Loopers:
a.
Swing the
Presser
Foot
Assembly
out or
position
and
remove
the
Needle
Plate,
Lower
Looper
Thread
Tube,
Feed
Dogs,
and
Dust Shield
for
accessibility.
Remove both
Loopers
by
means
of
the
Set
Screws
provided.
b.
The
Lower Looper
is
best
set
and
adjusted
before
the
Upper
Looper
is
placed
in
the
machine
and
after
the
Needle
has
been
properly
set
in.
1.
First
loosen
the
Lower
Looper
Screw
which
is
accessible
through
the
hole
in
the
front
of
the
Frame
Cap. As
this
Screw
is
just
to
the
left
of
the
Upper
Looper
Screw,
be
sure
to
loosen
the
proper
screw.
36.
Insert
the
Lower
Looper
pushing
it
in
as
far
as
it will go, and
tighten
the
Set
Screw
against
the
flat
of
the
Looper.
37. Slowly
turn
the
Hand Wheel away
from
the
operator.
The
Needle on
its
downward
stroke
should gently
contact
the
shank
of
the
Lower
Looper
at
point
"A"
. When
properly
set,
the
point
or
the
Lower Looper
must
make
gentle
but
firm
contact
with
the
Needle
at
point
"B",
but
should not deflect
the
Needle. If
necessary,
bend
the
Looper.
38.
The
Upper
Looper
is
secured
to
the Upper
Looper
Carrier
by a
Screw
accessible
through
the
right
hand
end
of
the opening through
the
front
of
the
Frame
Cap
.
Insert
the Upper
Looper,
pushing
it
into
the
Upper
Looper
Carrier
as
far
as
it
will go, and tighten
the
Set
Screw
against
the
flat
on
the
Upper
Looper.
39. Slowly
turn
the Hand Wheel away
from
the
operator.
The
Upper
Looper
should not
strike
the Needle but
the
point of Needle
should
pass
close
to
the
back
side
of
the
Upper
Looper
at
point
"C"
.
To
effect
this
adjustment
the
Looper
can
be
sprung
up
or
down,
as
well
as
sidewise.
40.
Turn
the
Hand Wheel
until
the
throat
of
the
Upper
Looper
is
about
to
pass
the
left
end
of
the Lower
Looper
on
the
upstroke.
When
properly
adjusted,
the
throat
of
the
Upper
Looper
should
pass
just
clear
of
the
left
end
of
the
Lower
Looper
on
the
up and down
stroke
as
shown
in
illustration
position
#3.
41.
Finally,
turn
the Hand Wheel
completely
around
and
see
that
the
Loopers
and
Needle
are
properly
adjusted
to
each
other.
After
adjustment,
check
to
be
sure
the
Set
Screw
holding
each
Looper
is
properly
tightened.
THREADING
42.
To
thread
the
machine,
follow the
Threading
Diagram
provided
with
each
machine.
A
duplicate
may be obtained upon
request
provided
that
the
style
and
serial
number
of
the
ma-
chine
is included with
the
request.
The
matter
of
threading
is
important
and although
simple,
it
must
be
accurate.
43. When
threading
the
Looper
Threads,
it will
be
found convenient
to
use
a
threading
wire.
With
the
thread
or
yarn
inserted
in
the
eye
of
the
threading
wire,
pass
the
wire
through
the
thread
eyes
and
tension
discs
as
shown on
the
threading
diagram
.
To
place
the
Lower
Looper
in position
to
be
threaded,
turn
the
Hand Wheel
until
the Needle
is
in
its
highest
position.
Then, it
will
be
possible
to
pass
the
threading
wire
through both the
L.
L.
Thread
Tube
and
the
Lower
Looper
simultaneously.
44.
The
machine
is
ready
to
"chain"
after
threading
the
needle
or
needle
and
looper
as
shown
on
the
threading
diagram.
45.
It
is
generally
advisable
to
keep
tension
on
the
thread
as
light
as
necessary
to
produce
good
results.
11

Table of Contents

Related product manuals