Adjusting The Position Of Counter Knife And Moving Knife - JUKI LU-1520NCS-7 Instruction Manual

22. ADJUSTING THE POSITION OF COUNTER KNIFE AND MOVING KNIFE

WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
b
❶
❷
c
❶
❺
a
❶
❶
0.3 ± 0.1 mm
d
b
❶
❷
c
❸
❷
❹
❼
❽ ❻
1) Bring moving knife ❶ to its initial position.
2) Loosen setscrews ❸ and adjust the posi-
tion of counter knife ❷ so that the follow-
ing two items are satisfied.
• Longitudinal position
Adjust the distance from the tip of
counter knife ❷ to end face a of the
throat plate mounting surface (near
side) to 25.8 ± 0.1 mm.
• Lateral position
Adjust so that, when moving knife ❶
operates, hook section b of moving
knife ❶ do not overlap left end face c
of counter knife ❷ .
3) Loosen setscrews ❹ and adjust the
lateral position of moving knife ❶ so that
a clearance of 0.3 ± 0.1 mm is provided
between moving knife ❶ and bobbin
case stopper d, when moving knife ❶ is
moved forward.
After the adjustment, tighten setscrews
❹ of moving knife.
* To advance moving knife ❶ , loosen
clamping screw ❼ of moving knife driv-
ing arm ❻ , or carefully turn the hand-
wheel by hand to bring the needle bar
upward until the needle tip is aligned
with the top surface of feed dog.
4) Loosen clamping screw ❼ of moving
knife driving arm ❻ and adjust the initial
position of moving knife ❶ so that a
distance from the tip of moving knife ❶ to
the end face a of throat plate mounting
surface (near side) is 23.6 ± 0.1 mm.
After the adjustment, tighten clamping
screw ❼ .
(Caution) When tightening clamping
(Caution) It is possible to shift counter knife
❷ closer to the operator's side.
Be aware, in such a case, howev-
er, counter knife ❷ can interfere
with feed dog ❺ depending on
the stitch pitch.
– 18 –
screw ❼ , take care not to pro-
vide an axial play in moving
knife driving arm ❽ .