Singer 271K - Full Speed

BOBBIN THREAD
MORE TENSION
LESS TENSION
Fig. 16. Regulating Bobbin
Thread Tension
more tension
LESS tension
.MORE tension
LESS TENSION
Fig. 17. Regulating Needle
Thread Tension
MORE
TENSION
TENSION
1.PULL FORWARD ON HAND RATCHET
LEVER REPEATEDLY
2. OPERATE MACHINE AT HALF SPEED
Fig. 18. Operating Hand-Ratchet
FULL SPEED
HALF SPEED
SHIFTER
'^FULL SPEED
HALF SPEED
Fig. 19. Two-Speed Belt Shifter
THREAD TENSIONS
Tension on threads should be AS LIGHT AS
POSSIBLE, while still sufficient to set stitches
correctly in buttonhole.
Regulatethe tensions, as instructed in Figs.
16 and 17.
Tension on needle thread, at all three points
shown in Fig. 17, should be uniform and equal
to tension on bobbin thread.
PURLSTITCH: Needle thread tension should
be strong enough to draw purl evenly to top
side of buttonhole.
WHIPSTITCH: Do not pass thread through
middle tension device.
PLACING FABRIC UNDER CLAMP
Depress clamp lifting treadle to raise clamp.
Position fabric under clamp so that desired
location of end of buttonhole nearest you is
directly beneath needle. Release clamp. Start
machine.
COMPLETING AN UNFINISHED
BUTTONHOLE AFTER RE-THREADING
If thread breaks or bobbin becomes empty
before completing a buttonhole, re-thread ma
chine as required and pull hand ratchet lever
forward repeatedly, as shown in Fig. 18, until
unfinished buttonhole is at desired position to
resume sewing.
Operate machine at half speed, as instructed
in Fig. 19, until this buttonhole is finished.
THE TWO-SPEED BELT SHIFTER
The two-speed belt shifter regulator per
mits operation of machine at half speed when
ever desired. Half speed is especially recom
mended when repairing unfinished buttonholes.
To operate at half speed, pull lever, shown
in Fig. 19, outward as far as possible and start
the machine.
To return to normal speed, push lever in
as far as possible, as instructed in Fig. 19.
From the library of: Superior Sewing Machine & Supply LLC