Sears 17891 - Manual (Page 19)

STRAIGHT STITCHINd
Undif
side
Top stitch ^ Topstitoh
too tight toolooso
aOZAQ SrirCHilUG
THREAD TENSION COimiOL
StmuQHT STITCHING
Thi good looking spoMirsni» of your stitching
h tirgelv dswrmined by thi bolancod tarnlon or
both top snd botifain throsds. The loiittion is Moli
balanced Mhen these two titreada 'lock' In the
mitkii of layers of tebdc^ ate
sim M^
riK fflOil iWilCS iM lOp uiraM WwOn roiiuOi
should be Set Ml ttte white tthie bi^waih 3 andS.
If, when you Start to sew. you find that the
stitcNng Is Irregtilis, you wW need to acguet the
tensitmcMNiirol.
Make any adjustments vM pm&m foot 'down'.
1. If the threads ire looking on the top surfaca
2 .
too ti^t. tanioti ean be deoiiaied by
turning tNi tension f»ntrol to the left (lower
numbers).
if the reverse Is happening with the threads
on the underside of the febrio, the k
too tooie. This «ian be oorreotad by turning
th# tmsion control^ to the right (higher
numbers).
The top tiiriid may appear on the bo
depending on the dtraed. labdc. type of i
and sewing spaed, but the bobbin thread i
ZIGZAG STITCHING
ÉTSa é V i DOnOfTI
ititoh
t must
nevir appear bn the top of thè fabric.
In the case of zigzag atitching. the wkJar the
zigzag setting, the more chance there Is of
puckertr^. If this occurs decraati the top
tension Mightiy attd/or reduce the zigzag width.
BOBBIN THBEAO TIN8I0N
The bobbin thread tension has bean coitectiy
set at the factory, so you do not need to adKist
it.
morì
rm m
threao tìnsion ralanoi
A perfect stitch is cAstalned when the tension
Is well balanced, but the tension balance may
vary according to the type and sfza of needle,
thread and fabric. Tha fabric determinas size of
thread and needle. The presser foot pressure
and the thread tension control should also be
adjusted prcH^erly.
(FABRICS:
Heavy fabrics, stiff • Increase top thread
tension. Use larger size needle, heavier thread
and longer stitch length.
18
Heavy fabrics, soft • Decrease top thread
tension. Use longer stitch length,
tight, sheer fabrics • Decrease top thread
tension and presser foot pressure. Use shorter
stHch length. Sew slowly.
THREADS:
Potyi»terand silk • Decrease top thread teni^on.
Nylon “ Increase top thread tent^on.