SINGER W203 - Manual (Page 10)

16 17
To Set the Needle Bar
See that the needles are up In the holder as far as they will go.
There are two lines across the needle bar about two inches above the
Icwer end. When the needle bar is at Its lowest position, the upper
mark should be Just visible at the end of the needle bar frame.
In case the needle bar Is not correctly set, loosen the needle bar
connecting stud pinch screws (G, Flg,4) and place the needle bar in
correct position as directed above, then retlghten the screws (G).
To Set a Needle Bar Which Has No Mark
Adjust the feed eccentric (B, Fig.17) so that there Is no feed
movement of the needle bar frame, then set the needle bar so that when
It rises 1/8 Inch from Its lowest position, the points of the sewing
hooks will be about l/ie Inch above the eyes of the needles.
To Change the Amount of Lift of
the Alternating Pressers
The height of lift of the pressers Is adjustable by moving the
link (F, Flg.4) to any of the four holes In the rock shaft crank. The
majclmum lift Is secured with the link In the bottom hole. The amount
of lift should be regulated according to the thickness of the material
being sewn. The feet should lift Just high enough to clear the
material.
To Adjust the Relative Height of Lift
of the Vibrating and Lifting Pressers
As a rule, the vibrating and lifting pressers should lift an equal
height, but some grades of work may require that they lift an unequal
height. To change the relative lift of the presser feet, loosen the
screw (E,Flg.3) at the back of the machine and move the vibrating
presser bar upward or downward as required, then securely tighten
the screw (E).
Relative Positions of Vibrating Presser Bar
and Lifting Presser Bar
The distance between the vibrating presser bar and lifting presser
bar, after adjusting the feed eccentric (B, Fig. 17) so that there is no
feed movement of the needle bar, should be 5/8 Inch as shown In Fig. 4.
If the distance between the vibrating presser bar and the lifting
presser bar Is more or less, Insert a screwdriver In the hole at
(C,Flg.3) at the rear of the machine and loosen the clamp screw which
holds the needle bar rock frame rock shaft. While this screw Is loose,
the needle bar frame can be moved forward or backward to the required
distance. A piece of metal of the correct width may be used to deter­
mine the correct distance. When making this adjustment be sure to see
that the feed eccentric (B,Fig. 17) Is set so that there Is no feeding
movement of the needle bar. When the adjustment has been made, securely
tighten the clamp screw at C.
To Time the Sewing Hook
I
,' i.'
Adjust the feed eccentric (B,Fig. 17) so that there Is no feeding
motion.
Remove the throat plate and turn the balance wheel over toward
you until the lower mark across the needle bar Is Just visible at the
end of the needle bar frame on the upward stroke of the needle bar.
If the needle bar and sewing hooks are correctly timed, the points of
the hooks will be at the centers of the needles and about 1/16 Inch
above the eyes.
In case the sewing hooks are not correctly timed, turn the balance
wheel over toward you until the needle bar has descended to Its lowest
point and has risen until the Icwer timing mark across the needle bar
Is Just visible at the end of the needle bar frame.
Loosen the two screws In the hub of each hook driving gear (T, Fig.
19) and tap this gear to the right or left on the hook driving shaft
until the point of the hook Is at the center of the needle. Tapping to
the right gives an earlier hook timing, and to the left a later hook
timing. Securely tighten the two set screws In each gear (T).