Baby Lock BL-5180, Service Manual

Page: 51 / 69

3. LOWER LOOPER ADJUSTMENT
4. NEEDLE GUARDS ADJUSTMENT
Looper arm
screw for
adjusting position
a) Replacement of lower looper
Slide the pipe rubber, and loosen the screw.
Replace new lower looper, and slightly tighten the screw.
Adjust the radius 55.4mm 0.1, and firmly tighten the screw.
Replace the pipe rubber.
b) Lower looper position
Turn the handwheel, and bring lower looper to
the far left.
Loosen looper arm screw, and adjust lower looper
to the correct position.
You are required to check the distance of tip of
lower looper and needle.
c) Distance between lower looper and needle
Turn the handwheel, and bring tip of lower looper to
the center of left (right) needle.
Loosen looper arm screw, and adjust lower looper
to the correct position.
Lower looper
fixing screw
Right
Needle
Lower looper
position
3
55.7 mm
+
0.1
+
#11(#75)Needle
5.2 mm (SX,DX,AT)
0
-0.1
#14(#90)Needle
5.3 mm (ATW)
#14(#90)Needle
4.8 mm
(BLE5, BLE8W))
0
-0.1
0
-0.1
c) Rear needle guard position
Loosen rear needle guard screw ,and adjust rear needle
guard to the correct position.
c) Adjusting needle guards
Loosen front needle guard screw,
and adjust front needle guard to
the correct position.
Rear needle guard can be adjusted
by bending.
1.3mm
Rear
needle guard
Rear
needle guard
NOTE: After adjusting loower looper, you are required to
check JET AIR THREADING.
0
2.0-2.3mm
left,right
needle
left,right
needle
screw
Front needle guard
fixingscrew
Front
needle
guard
Front
needle
guard
0
0