Necchi Automatic Supernova Ultra Mark 2 - 6. To Wind Empty Bobbin; 7. To Remove Bobbin Case

T
Fig . 11
G
Fig. 12
Fig . 13
Fig. 14
Fig . 15
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10. TO ADJUST TENSIONS
- To loosen the upper thread tension,
turn button "T,, (Fig . 11) in the direc -
tion of
the arrow . By turning button "T •
in the opposite direction the tension will
be i ncreased .
NOTE : the normal value of th e upper thread
tension is indicated on the knob by a small
red disc.
-
The lower tension is increased by tighten-
ing screw « G,, (Fig. 12); it is decreas-
ed by loosening same .
a) The upper and lower threads must lock
in the centre of the fabric (Fig. 13), that
is, their tensions must be even. In this
condition, two faults may occur:
1) Even tensions, too loose. The stitches
are loose. It is then necessary to in-
crease both tensions.
2) Even tensions, too tight. The fabric
ruffles or the thread break s. It is
necessary to loosen both tensions.
b) If the upper tension is tighter than the
lower, the upper thread will lie flat on
top of fabric and the lower thread will
be pulled to the upper surface (Fig. 14)
and be visi ble there in small knots. Ad-
just tensions by tightening the lower
tension and loosening the upper one.
c)
If the lower tension is too tight, the lower
thread will lie flat on the underside of
the fabric (Fig. 15); therefore tighten the
upper tension and loosen the lower.
NOTE: When sewing on hard or thick
fabr ics, it is advisable to loosen screw • E •
(Fig. 11) and slightly move small plate « P »
in the direction opposite to that of the arrow.
11. TO REGULATE STITCH LENGTH
- Turn button « D ,, (Fig. 16); the stitch
length expressed in mm. is visible through
small window « F ,,
The normal stitch length is no . 2.
The stitch length normally required for
satin stitch (see Para. 26) is indicated by a
red square mark.
To reverse direction of sewing
Fig. 16
- Push button « R ,, completely (Fig. 16); the machine will sew in reverse
with the stitch length regulated by button « D ,, .
- The machine resume s s ewing forward as soon as button • R" is left free.
12. TO START SEWING
- Holding the thread hanging
out of the needle eye , turn
balance wheel to bring
needle to its highest posi-
tion.
-
Draw the upper thread; the
lo wer thread will be pulled
up through the hole of
needle plate .
-
Place both threads behind
presser foot.
Start s ewing slowly, holding
t he threads for the first 4-5
stitches.
Fig.
17
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