Adjusting the Left-Right Positioning of the Shuttle Gib Hook
1.
Make a mark on the shuttle race guide
shaft (p. 48,
47
A
) where the halves of the
compressible clamp meet (
B
). If the shaft
should accidentally rotate, realign the
mark with the clamp gap.
To move the hook to the left —
2.
Incrementally loosen the compressible
timing clamp screw (
C
) on the
compressible timing clamp until light taps
will move the shuttle assembly. Carefully
move the shuttle assembly (
D
) to the left.
3.
Move the assembly to position the hook
as close to the needle as possible without
deflecting (p. 45,
45
).
4.
With the clamp gap (
B
) and reference
mark (
A
) aligned, hold the clamp to the
far left firmly against the cast iron foot and
tighten its screw (
C
).
5.
Holding the gib hook in place, loosen the
right collar (
E
) and move it as far right as
possible without touching the frame.
6.
Tighten the two collar screws. There
should be practically no side-to-side play
in the center shaft.
To move the hook to the right —
7.
Loosen the two screws in the right collar
(
E
) and move it to the left on its shaft and
move the shuttle assembly (
D
) to the right.
8.
Move the assembly to position the hook
as close to the needle as possible without
deflecting (p. 45,
45
).
9.
Holding the correct position of the shaft
move the right collar (
E
) as far right as
possible without touching the frame and
tighten its screws.
10.
Holding the gib hook in place, loosen the
compressible timing clamp screw and
move the timing clamp all the way to the
left.
11.
With the clamp gap (
B
) and reference
mark (
A
) aligned, tighten the clamp screw
(
C
). There should be practically no side-
to-side play in the shaft.
Applies to LS-1 Model Only
47
B
A
C
D
C
E
Hook/Driver Gap
Oscillating hook sewing machines have loose
tolerances between the Shuttle Gib Hook
and the Shuttle Driver. This play between the
parts is intentional and allows the Ultrafeed
to sew heavier denier threads than many
larger rotary hook machines. The typical gap
between parts is 0.04" (
48
).
48
Gap
Ultrafeed
®
Guidebook: Troubleshooting the Ultrafeed®
48
47
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