B Timing Between The Rotating Hook Motion And The Needle Motion - Mitsubishi Electric LU2-4400-B0B Instruction Manual

HOW TO USE
B Timing between the rotating
hook motion and the needle
motion
In case of double-needle, adjust right and left
timing in the same way at the same time.
Note: If you remove the presser foot, the throat
plate, and the feed dog, it makes easier to
adjust.
( 1 ) Set feed length to 6mm.
( 2 ) Loosen all screws Ⓐ, Ⓑ, Ⓒ.
Note: Be careful not to disengage the large
gear and the small gear.
( 3 ) Lift the needle bar 2.4mm from the lowest
position. Refer to timing marks shown in the
figure.
( 4 ) Slide the hook saddle right and left so that
the gap between the tip of the hook and the
scarf of the needle is 0.05mm or lower.
( 5 ) Tighten screws Ⓐ, Ⓑ.
Note: Be careful not to overtighten screws Ⓑ.
( 6 ) Slide the large gear right and left so that the
tip of the hook position is in the center of the
needle and tighten screws Ⓒ.
Note: Check the large gear and the hook
saddle isn't in contact and its distance is
less than 3mm.
( 7 ) Move the tip of the hook to the needle side
by turning the pulley.
( 8 ) Return the machine head to the original
position and adjust the needle guide position
so that it come lightly in contact with the
needle.
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
(a) Position of the needle bar:
The lowest position
0.05mm or lower
0.05mm
— 7 —
Screw Ⓐ
Set Screw Ⓒ
Screw Ⓑ
(b) Position of the needle bar:
2.4mm lifted position from (a)
Tip of
the hook