Leather Machine COBRA CLASS 3 Maintenance And Tips

MAINTENANCE AND TIPS
FOR
THE COBRA
CLASS
3,
4,
&
KING COBRA,
PRO
2000,
ARTTSAN
TORO
3000, 3200,4c,c,0,
cowBoy
3500, 4500,
TECHSEW
5100,
SEW
PRO
44L,
KINGMAX, MASTER
LOCK, JUKI 441.
AND
OTHER
441
STYLE
MACHINES
Thread
1)
Make sure that the thread you are using
is
not
dry, old, or damaged by the
elements.
Keep
thread in
a plastic
bag
to help protect it.
Make sure that the thread does not untwist, if
so,
then the bonding agents have
evaporated or weren't very good to
begin
with.
Threading
2l
Make sure that your machine
is
threaded correctly. Breaking thread, skipping, fraying
the thread,
and
tension problems will occur if your machine
is
threaded incorrectly.
Take up lever
3)
The
take up lever
has
2
functions: to give the thread enough
slack
so
the hook can carry
the thread around the bobbin
case, and,
after the hook
releases
the thread, allows the
thread to
pull up into the leather.
Check
spring
4)
The check spring maintains tension on the thread
as
the take up lever returns to the top
position.
Needles
5)
The needle must be installed correctly. Make sure that
the long groove
is
on
the left,
and the scarf
is on
the right.
Needles are tempered, so after
usage,
they
lose
their temper
and become weak. A
weak
needle will bend or break easier after losing its temper. When the needle breaks,
it
could cause damage to
the presser foot, needle plate, feed dog, or shuttle hook,
so
make sure that
you change your needle every 12 hours of actual sewing.
Also, make sure
that you
use
the correct
size needle
for the thread
and thickness
of
leather that you are using. lf you are
using
too
big
of a needle,
then
at
times, the thread
will travel up and down inside the hole that the needle punched resembling
a
tension