Clearance Between The Needle And The Looper; Adjusting The Needle Guard - JUKI MEB-3810N Series Instruction Manual

10-5. Clearance between the needle and the looper

WARNING :
1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start
of the sewing machine.
2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming
knife during work.
❶
❸

10-6. Adjusting the needle guard

WARNING :
1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start
of the sewing machine.
2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming
knife during work.
❷
❸
❶
❶
−0.03 to
0.05 mm
Needle
inside
❶
❷
❹
❷
❸
Needle
outside
− 84 −
The standard adjustment value of the clearance be-
tween the needle and the looper is 0.03 to 0.05 mm.
Loosen looper setscrew ❶ and adjust the clearance
between needle ❷ and left looper ❸, and between
the needle and right looper ❹. Then fix the loopers
in place.
1. When the clearance between the needle
and the looper is adjusted, the spreader
height has also to be adjusted simulta-
neously as described in
ance between the spreader and looper
and the opening timing of the spreader"
p. 85.
2. Be sure to adjust the clearance when-
ever the needle size is changed.
1) Loosen setscrew ❶.
2) Set the clearance between needle ❷ and
needle guard ❸ to –0.03 to 0.05 mm. How-
ever, the clearance should be adjusted to
smaller than the clearance provided between
the needle and the looper.
3) Tighten setscrew ❶.
4) Check the position both at the time of needle
inside and of needle outside.
Be sure to adjust the needle guard when
the needle size is changed or when
the adjustment of needle and looper is
performed.
Adjust the clearance when needle
aligns with the looper balde point at
the inside and outside respectively.
In the case of sewing a heavy-weight
material, adjust the clearance provid-
ed between the needle ❷ and needle
guard ❸ to 0 (zero).
"10-7. Clear-