SINGER W1220 - 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 se
that needle is straight and parallel as shown in above diagram.
Turn hand wheel toward you to raise needle bar to its highest po:
tion.
Loosen needle clamp screw and insert needle upward as far as it w
go, making sure flat side of needle is towards back of machine :
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 har
wheel toward you and see that needle comes down through tf
center of the needle hole in the needle plate as shown in the abo\
diagram.
Stitch selector dial must be set in straight stitch needle positic
when checking needle alignment.
If skipped stitches occur, needle may be incorrectly inserted.