Adjustment Of Clearance Between Needle And Rotary Hook - Janome HD 3000 Servicing Manual

ADJUSTMENT OF CLEARANCE BETWEEN NEEDLE AND ROTARY HOOK

The clearance between the needle and the rotary hook tip should be -0.10 to +0.05 mm.
(1) Remove the needle plate and bobbin holder, and then attach the master needle.
(2) Set the pattern selector dial at " " and adjust the zigzag width to "0".
(3) Remove the bed cover (unit).
(4) Loosen and then temporarily tighten the hinge screw (A), and loosen the set screws (B)
and (C).
(5) Turn the balance wheel toward you to cross the master needle and the rotary hook tip, and
adjust the clearance between them in a range of -0.10 to +0.05 mm by vertically moving the
hook setting plate.
(6) Turn the balance wheel toward you at the maximum zigzag width to check the clearance
between the master needle and the rotary hook tip at the right and left needle drop
positions.
(7) Completely tighten the set screws (B) and (C) and hinge screw (A). Then remove the
master needle.
(8) Check the backlash between the hook drive shaft gear and the lower shaft gear. (For the
adjustment procedure, refer to page 13.)
(9) Attach the bed cover (unit), bobbin holder and needle plate.
(Note)
For removal and attachment of the bed cover (unit), refer to page 4.
1 2