SINGER W511 - Manual (Page 6)

CHANGING THE NEEDLE
Flat side
Always make sure needle is
straight.
To check straightness of
needle, lay needle on a flat
surface and see that needle is
straight and parallel as shown
in above diagram.
• Needle
Clamp Screw
Flat side towards
back of machine
• Turn hand wheel toward you to
raise needle bar to its highest
position.
• Loosen needle clamp screw
and insert needle upward as
far as it will go, making sure
flat side of needle is towards
back of machine as shown
in the above diagram.
• Tighten needle clamp screw
with screwdriver.
• Follow the same procedure for
insertion of twin needle.
To make sure that needle has
been inserted correctly, turn
hand wheel toward you and
see that needle comes down
through the center of the
needle hole in the needle plate
as shown in the above diagram.
Stitch selector dial must be set
in straight stitch needle posi­
tion when checking needle
alignment.
If skipped stitches occur, needle
may be incorrectly inserted.