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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.
q
0.5 mm
A
i
T
157
■ Horizontal position adjustment
w
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
4. Securely tighten the screws w.
5. Loosen the two set screws t and the two set screws
6. While pushing the thread trimming driving rod u by
7. Provisionally tighten the two set screws t.
8. Place the set screw collar !1 firmly against the thread trim-
r
t
!1
y
!0
o
u
■ Rotating direction adjustment
1. While still pushing thread trimming driving rod u by
U
2. Securely tighten the two set screws t.
!2
3. While still pushing thread trimming driving rod u by
t
!0
u
LZ2-B855E,B856E
movable knife e is 0.5 mm inside the edge of the knife
unit q.
y.
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 .
ming cam !0 , and then securely tighten the two set screws
y.
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.
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.
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