Sears 17891 Sewing Machine User Manual


 
STRAIGHT STITCHING
Decrease ktereue
temllotl tensioh
Top stitch
too tight too lOOse
ZIGZAG STITCHING
For molt febdu the top thread tlm_on control
_o,ld beut inthewhitezonebetwwn3endS.
If, when you start to sew. you find that the
ztJtchlngisIrr_ulK, youwillneedto adjustthe
tension_,
+" w
Make any adjustrnlmtl with ptess_ foot 'down.
1, If the lhrsadl ore kx_king on the top iu_face
withthetopthrsadlytngftat,thelop_ is
tOO tioht. Timeton can be _ by
turning the tension centre4 to the teh (lower
n,ml_rs).
2, If the m/area is heppenin9 with the threads
onthe undemideof the fe_o, the tonzlonis
too loeb, This can be oorreCt_ by tumtn9
the tensioncontrolto the right (higl_
numberz),
ZIGZAG STITCHING
In the cm of zigzag stitching, the wider the
zigzag setting, the more chem_e there Is of
puckering, If this occurs decrease the top
tar.don ilightly and/or reduce the zl_ag width.
BOBBIN THREAD TENSION
The bobbin thread tension has been correctly
set at the factory, so you do not need to adjust
it,
h r _ i r i i i i ,
MORE _lS8 ON _R_D _NSlON BALANCE
A perfect stitch is obtained when the tension
is well balanced, but the tension balance may
vary according to the type end size of _le,
thread and fabric, The fabdc determines size of
thread and needle, The presser foot pressure
and the thread tension control should also be
adjusted properly,
FABRICS:
Heavy fabric, stiff . increase top thread
tension, Use larger size needle, heavier thread
and longer stitch length,
18
Heaw fabrics, soft - Decrease top thread
tension. Use longer stitch length,
Light, sheer fabdcs - Oecrease top thread
tension and presser foot prate. Use shorter
stitch length, Sew slowly,
THREADS:
Poiyester and silk, Decrease top thread tension.
Nylon- Increase top thread tension,