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LOWER TENSION
ADJUSTMENT
If your machine skips stitches
or loops stitches, it may
require a tension adjustment.
To check bobbin thread ten
sion, follow these steps:
®
Push latches of the shuttle
race cover to the outside,
as shown in figure ETD.
©
Remove shuttle cover as
shown in figure
©
Remove the shuttle as
shown in figure
©.
@
Suspend bobbin, bobbin
case, and shuttle all
together by thread as
illustrate d in figure
When jerking the thread
slightly, all of them should
slide down with light resis
tance. If they do not slide
down with a slight jerk of
the thread, the bobbin
case tension is too tight. If
they slide down too easily,
the bobbin case tension is
too loose. See following
page for adjustment ot the
bobbin case. Once the
bobbin case is correclly
adjusted, it is easy to use
the upper tension to bal
ance the stitches as
shown on page 12.
x Shuttle
y Bobbin ascrew using
small screwdriver.
I
-
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Page49
AJUSTE DE TENSION DE
LA BOBINA
Si Ia máquina pierde puntos o
hace nudos por el revés en Ia
costura no es problema de Ia
máquina, sino de Ia tensiOn.
Para verificar Ia tensiOn de Ia
bobina, se debe tomar ésta y
el cangrejo como se indica en
el dibujo, si Ia tensiOn es cor
recta se desplaza rán lenta
mente.
Después ajustar Ia tensiOn
superior con los nOmero 4, 5,
o 6.
Girar los seguros hacia
afuera.
Quitar Ia tapa del cangrejo
©
Quitar el cangrejo.
®
x Cancrejo
y Carrete y bobina
El cangrejo y Ia bobina se
desplazarán lentamente.
30g
j
y
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