To Adjust Clearance Between Needle And Rotary Hook - Janome MC6300P Service Manual

TO ADJUST CLEARANCE BETWEEN NEEDLE AND ROTARY HOOK

The clearance between needle and the tip of the rotary hook (J) should be between –0.1 and +0.05mm.
Hexagonal socket
screw (A)
Needle bar
supporter (B)
Setscrew (E)
Hook base
plate (H)
Master
needle (I)
-0.10 - +0.05mm
Within
Hole of
0.15mm (D)
needle
plate (C)
Setscrew (G)
Setscrew (F)
Tip of hook (J)
[Adjustment I]
1. Remove the face plate, and attach a master
needle (I).
2. Turn the power switch on.
3. Select the stitch pattern (
width at "7".
4. Remove the presser foot, needle plate and
bobbin holder.
5. Loosen the hexagonal socket screw (A) and
adjust the clearance between the needle and tip
of the rotary hook (J) by moving the needle bar
supporter (B).
6. Tighten the hexagonal socket screw (A).
7. Attach the presser foot, needle plate and bobbin
holder.
Make sure that the distance between the tip of
the needle and the center of the hole of the
needle plate (C) is within 0.15mm (D). If not,
return the needle bar supporter (B) to the
original position and adjust the clearance
between the needle and the tip of the rotary
hook (J) by using Adjustment II.
[Adjustment II]
1. Remove the machine base (refer to page 2).
2. Turn the power switch on, and select the stitch
pattern ( ).
Set the zigzag width at "7".
3. Remove the presser foot, needle plate and
bobbin holder.
4. Loosen the setscrews (E) and (F).
Loosen the setscrew (G) just enough to move
the hook base plate (H).
5. Turn the hand wheel toward you and adjust the
clearance between the needle and the tip of the
rotary hook, by moving the hook base plate up
or down, to within –0.1 to +0.05mm at the left
and right needle positions.
6. Tighten the setscrews (E), (F) and (G) firmly.
7. Check the backlash between the hook drive and
lower shaft gears.
Refer to page 15 for the adjustment.
8. Attach the machine base, bobbin holder, needle
plate and presser foot.
14
)and set the zigzag