Performance checklist, Usta de comprobación del funcionamiento – SINGER 1873 User Manual

Page 68

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Performance checklist

When sewing difficulties occur, look back
through this manual to make sure you are

correctly following the instructions. If you
still have a problem, the reminders below

may help you to correct it.

Needle Does Not Move

Is

machine

connected

to

electrical

supply?
Is the power and light switch on?
Is controller connected?
Is the handwheel engaged for bobbin
winding?

Needle Moves But Stitch Is Not

Formed

Is needle defective?
Is needle fully inserted into needle clamp?

Are

bobbin

and

needle

correctly

threaded?

Is bobbin correctly Inserted into bobbin
case?

Needle Breaks

Is needle straight and sharp?
Is needle correct size?
is needle fully inserted into needle clamp?

Are controls properly set?
Are accessories correct for application?

Bobbin Winding Diffficuities

Is thread unwinding freely from spool?
Is bobbin winder engaged?
Is thread end securely held at start of

wind?

Is thread hanging up on the slit on the

thread spool?

Upper Thread Breaks

Is machine properly threaded?
Is thread freely unwinding from spool?
Is proper spool cap being used?
Is needle correct size for thread?
Is upper thread tension too tight?
Is bobbin case properly Inserted?

Is bobbin rim free of nicks?

Lower Thread Breaks

Is bobbin correctly wound?
Is bobbin correctly inserted into bobbin
case?
Is bobbin case correctly threaded?
Is thread hanging up on the slit on the

thread spool?

Skipped Stitches

Is machine properly threaded?
Is fabric firmly held down?
Is needle correct style and size?
is needle straight and sharp?

Fabric Does Not Move Properiy

Under Presser Foot

Is presser foot correctly attached to
machine?
Is presser foot lowered?
Is stitch length correctly set?

Usta de comprobación del

funcionamiento

Cuando aparezcan dificultades al coser,

consulte este manual para asegurarse de que
sigue correctamente las instrucciones. Si aún

así continuasen los problemas, los

recordatorios siguientes pueden ayudarla para
corregirlos.

La aguja no se mueve

¿Está la máquina conectada a la red?
¿Está abierto el botón de fuerza y luz?
¿Está conectado el regulador?
¿Está conectado el devanador?

Dificultades en ei devanado

¿Se devana correctamente el hilo del carrete?
¿Está conectado el devanador?
¿Está sujeto con seguridad el extremo del hilo
al empezar el devanado?
¿Está el hilo enganchado en la ranura del

carrete de hilo?

El hilo superior se rompe

¿Está la máquina enhebrada apropiadamente?

¿Se devana correctamente el hilo del carrete?
¿Se está utilizando el sujetador de carrete
apropiado?
¿Es la aguja del tamaño correcto para el hilo?
¿Está demasiado prieta la tensión del hilo

superior?
¿Está la caja de bobina debidamente
insertada?
¿Está ei borde de la bobina libre de muescas?

66

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