SINGER 143G2 - Manual (Page 8)

12
To Turn a Corner
Stop the machine while the needle Is rising, but before It is
out of the material, raise the presser foot and turn the work,
using the needle as a pivot.
To Remove the Work
Raise the presser lifter, turn the machine by the machine
pulley until the talte-up lever Is at Us highest point and draw
the work from you. If the threads do not draw out easily, the
taKe-up rever la not In the right position, as directed, if the
machine Is stopped as directed, the needle will not be unthreaded
In starting to sew, even If only a short end Is left through the
needle.
For convenience In taking out the work, the tension of the
upper thread Is released by raising the presser foot with the
lifter; but Is not released by thick goods or seams passing under
the presser foot. Do not try to adjust the upper tension when
the presser lifter Is up as the tension Is then loose.
Causes of the machine not working properly will usually be
found In the tension not being correctly adjusted, or Its discs
may be clogged with lint or knots of thread or the thread con­
troller spring may not have the correct tension (this is Impor­
tant); the thread may be too coarse or too fine for the needle,
or the needle and thread too coarse or too fine for the throat
plate, or
the needle bent or blunt. See that a straight needle
Is pushed up In the needle bar as far as it should go; any
particle of lint or dirt which prevents It from going up can be
removed through the cross hole In the needle bar.
To Regulate the Pressure on the Material
The pressure of the presser foot on the material should be
heavy enough so that the material Is fed properly at all speeds.
The pressure on the material Is regulated by the thumb screw
(FjFlg.4) at the top of the machine. Loosen the set screw (Q,
Fig.4) at the back of the machine and turn the thumb screw down­
ward for more pressure or upward for less pressure, then tighten
the set screw (Q,Fig.4).
13
Tensions
The needle and bobbin threads should be locked In the centre
of the thickness of the material, thus:
Fig. 14. Perfect Stitch
If the tension on the needle thread Is too tight, or If that
on the bobbin thread is too loose, the needle thread will lie
straight along the upper surface of the material, thus:
Fig. 15. Tight Needle Thread Tension
If the tension on the bobbin thread Is too tight, or If that
on the needle thread Is too loose, the bobbin thread will lie
straight along the under side of the material thus:
Fig. 16. Loose Needle Thread Tension
To Regulate the Tensions
THE TENSION ON THE NEEDLE THREAD SHOULD ONLY BE REGULATED
WHEN THE PRESSER FOOT IS DOWN. Having lowered the presser foot,
turn the thumb nut (S,Fig.18) at the front of the tension discs
over to the right to Increase the tension. To decrease the ten­
sion, turn this thumb nut over to the left.
The tension on the bobbin thread Is regulated by the screw
(A,Fig.10) In the tension spring on the outside of the bobbin
case. To Increase the tension, turn this screw over to the right.
To decrease the tension, turn this screw over to the left.
When the tension on the bobbin thread has been once properly
adjusted. It Is seldom necessary to change It, as a correct
stitch can usually be obtained by varying the tension on the
needle thread.