Brother International LZ2-B856E Instruction Manual - English and Spanish - Page 176

Adjusting the position of the thread trimming cam B856E only

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12. STANDARD ADJUSTMENTS 12. STANDARDEINSTELLUNGEN 12. REGLAGES STANDARD 12. AJUSTES ESTANDARES 12-13. Adjusting the position of the thread trimming cam (B856E only) The knife unit q should already be installed in the correct way when the following adjustments are carried out. w q 0.5 mm r ˙Horizontal position adjustment 1. Tilt back the machine head. 2. Loosen the two screws w. 3. Move the stopper r to adjust so that the edge of the movable knife e is 0.5 mm inside the edge of the knife unit q. 4. Securely tighten the screws w. 5. Loosen the two set screws t and the two set screws y. 6. While pushing the thread trimming driving rod u by hand, adjust the horizontal position of the thread trim- ming cam !0 so that the roller o of the main lever i moves smoothly in and out of the straight section A of the groove in the thread trimming cam !0. 7. Provisionally tighten the two set screws t. 8. Place the set screw collar !1 firmly against the thread trim- ming cam !,0 and then securely tighten the two set screws y. t !1 A y i !0 o u ˙Rotating direction adjustment 1. While still pushing thread trimming driving rod u by hand, turn the machine pulley slowly by hand toward you until the reference line on the thread take-up lever !2 is aligned with the T mark on the face plate. Adjust U the position of the thread trimming cam !0 so that the knife begins to move at this point. !2 2. Securely tighten the two set screws t. 3. While still pushing thread trimming driving rod u by hand, turn the machine pulley slowly by hand toward you until the reference line on the thread take-up lever T is aligned with the T mark on the face plate. Check that the knife begins to move at this point, and that it re- turns when the reference line is aligned with the U mark. t !0 157 u LZ2-B855E,B856E

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LZ2-B855E,B856E
157
12. STANDARD ADJUSTMENTS
12. STANDARDEINSTELLUNGEN
12. REGLAGES STANDARD
12. AJUSTES ESTANDARES
■
Rotating direction adjustment
1.
While still pushing thread trimming driving rod
u
by
hand, turn the machine pulley slowly by hand toward
you until the reference line on the thread take-up lever
!
2
is aligned with the T mark on the face plate. Adjust
the position of the thread trimming cam
!
0
so that the
knife begins to move at this point.
2.
Securely tighten the two set screws
t
.
3.
While still pushing thread trimming driving rod
u
by
hand, turn the machine pulley slowly by hand toward
you until the reference line on the thread take-up lever
is aligned with the T mark on the face plate. Check that
the knife begins to move at this point, and that it re-
turns when the reference line is aligned with the U
mark.
12-13. Adjusting the position of the thread trimming cam (B856E only)
The knife unit
q
should already be installed in the correct way when the following adjustments are carried out.
q
w
r
t
y
!
0
!
1
o
u
i
A
!
2
t
!
0
u
■
Horizontal position adjustment
1.
Tilt back the machine head.
2.
Loosen the two screws
w
.
3.
Move the stopper
r
to adjust so that the edge of the
movable knife
e
is 0.5 mm inside the edge of the knife
unit
q
.
4.
Securely tighten the screws
w
.
5.
Loosen the two set screws
t
and the two set screws
y
.
6.
While pushing the thread trimming driving rod
u
by
hand, adjust the horizontal position of the thread trim-
ming cam
!
0
so that the roller
o
of the main lever
i
moves smoothly in and out of the straight section
A
of the groove in the thread trimming cam
!
0
.
7.
Provisionally tighten the two set screws
t
.
8.
Place the set screw collar
!1
firmly against the thread trim-
ming cam
!
0
, and then securely tighten the two set screws
y
.
0.5 mm
U
T