Brother b831 - Page 33

Needle bar rise and needle bar height
Needle bar down position
Needle bar down position
When raised 2.4 mm
When raised 2 4 mm
Needle bar down position
Rotary hook point Needle center
nt-®
(Model LT2-B832-400A]
^ High l> l| •Slide the needle
k] Y clamp all the way
Needle clamp
[Model LT2-B835-400A)
1~1.5 mm
B831 B832 B882
(1) Whenthe needle bar© isinits lowest positom, theneedlepositionreferenceline"a"ofthe needlebarmustbealigned
with the bottom edge of the needle bar bushing O- Loosen the set screw O' and align the needle position reference
line "a" of the needle bar with the bottom edge of the needle bar bushing O
(2) Whenthe needle bar O is 2.4 mm above its lowest position, needleposition reference line "b" ofthe needle bar is
aligned with the bottom edge ofthe needle bar bushing O At this time, the rotary hook point must be aligned with the
needle center.
Loosen the three set screws O. and align the rotary hook point with the needle center.
• When the rotaryhookpointisalignedwith the needlecenter, confirmthat thespacer between the top ofthe needle eye
and rotary hook point is 1 ~ 1.5 mm.
8835 8836
(1) When the needle bar o IS in its lowest position, the needle position reference line "a" of the needle baris alignedwith
the bottom edge of the needle bar bushing O-
(2) When the needle bar O is2.4 mm above its lowest position, needle position reference line "b" ofthe needle bar is
aligned with the bottom edgeofthe needle bar bushing O- At this time, the rotary hook point must be aligned with the
needle center.
Loosen the three set screws O. and align the rotary hook point with the needle center.
(3} When the rotary hook point is aligned with the needle center,thespace between the topofthe needle eyeand rotary
hook point must be 1 ~ 1.5 mm.
Removethe set screw O- turn the needle clampset screw O. and adjust so that the space between the rotary hook
point and the lop of the needle eye is 1 ~ 1.5 mm.
• One full revolution of set screw O will raise or lower the needle clamp approx. 0.6 mm.