Singer 236w Service Manual And Parts List page 8

6
UPPER THREADING
From the unwinder, pass the thread from bach
to front through hole 1, from right to left through hole
2, down through hole 3, up through hole 4, down through
hole 5, down under from right to left between tension
discs 6, up under controller spring 7, until it enters re¬
taining fork 8, up and over thread guide 9, from right to
left through hole 10, down and over thread guide 11,
into thread retainer 12, through thread lubricator 13,
down through thread guides 14 and 15 and from left to
Draw about three inches of thread through eye
of needle with which to start sewing.
TO REMOVE THE WORK
Stop machine with thread take-up lever at its
highest point, raise roller presser, draw work back and
cut threads close to the work.
TENSIONS
The needle and bobbin threads should be lock¬
ed in the center of the thickness of the material
as shown in Fig. 12.
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 as shown in Fig. 13.
WRONG
Fig. 13
If the tension on the bobbin thread istootight,
or if that on the needle thread is too loose, the bobbin
thread will lie straight along the under side of the ma¬
terial as shown in Fig. 14.
Fig. 14
TO PREPARE FOR SEWING
With the left hand, hold the end of the needle
thread, leaving it slack from hand to needle. Turn ma¬
chine pulley over toward you until needle moves down
and up again to its highest point, catching the bobbin
thread. Draw up the needle thread and the bobbin
thread will come with it through hole in throat plate.
Lay both threads back under the roller presser.
TO START SEWING
Place the material under the roller presser,
lower the roller presser and start to sew. Hold threads
until the first stitch is made.
TO REGULATE THE TENSION
The tension on the needle thread is regulated
by thumb nut M, Fig. 11. To increase the tension, turn
thumb nut M over to the right. To decrease the tension,
turn the thumb nut over to the left.
The tension on the bobbin thread is regulated
by screw K, Fig. 6. To increase the tension, turn
screw K over to the right* To decrease the tension,
turn the screw over to the left.