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SETTING THE NEEDLE BAR HEIGHT & ALIGNMENT (CONT)
FIG. 4
ALIGNING THE CYLINDER
FIG. 5
Correct spacing of the needles in the throat plate stitch tongue is
imperative to proper sewing conditions. Improper relationship of the
needles to the stitch tongue often results in malformed stitches. When
replacing the stitch tongue make sure needles are aligned properly
(see Fig. 4).
If the stitch tongue and throat plate are properly seated and the
needle position is not correct, the cylinder has probably been forced
out of position.
If realignment is necessary, refer to the section
"Centering the Cylinder".
When the needles are correctly positioned in the throat plate they are
centered in the stitch tongue (see Fig. 4). Actually, the needle bar is
centered to the throat plate and cylinder, however, to provide clear-
ance on the left side of the needle for the needle loops passing
around the looper during the down stroke of the needles, the slots in
the stitch tongue are made off-center to the left. Accurate position-
ing of the needles may be obtained by repositioning the cylinder.
Remove the top front cover and gasket from the main frame. Loosen
cylinder holding screw (A, Fig. 5). Turn eccentric screw (B) clock-
wise to move the cylinder so the needles are closer to the right side
of the stitch tongue. Turn the stud counterclockwise to locate the
needles closer to the left. Tighten screw (A) and recheck settings.
NOTE: The cylinder may not move freely when the eccentric is turned
because the joint sealant compound has set. Light tapping with a
wooden block at the joint or midpoint of the arm may be necessary.
9
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