Singer XL-420 Manuel D'instructions page 82

Embroidering is
continuing when
thread is tangled.
If the thread remains
tangled, the fabric
embroidery. Stop
embroidering, remove
the hoop and untangle
the thread.
Upper thread tension
is too tight.
This can cause fabric
in uneven feeding,
reduce the thread
tension.
Refer to page 22 - 23.
Select a correct
needle.
Refer to page 20 - 21.
Thread is tangled
somewhere along the
thread path.
If the thread is tangled
on the spool pin or
somewhere along the
thread path, this will cause
the thread to hang up and
not advance through the
machine. This will increase
the upper thread tension
and cause the fabric to
Refer to page 16 - 19.
80
HOOP SIDE
No stabilizer attached
when using light or
stretch fabric.
Attach stabilizer to
the fabric.
Refer to page 66 -
69.
Fabric is not tight
enough in the hoop.
Tighten the fabric in
the frames so that
when the fabric is
a drum.
Refer to page 64 -
65.
Embroidery hoop
is not correctly
attached.
Attach the hoop
securely to the hoop
mounting screws.
Refer to page 70 -
71.
Hoop is obstructed
against free motion.
h o o p a n d r e m o v e
things which cause
obstruction.