Brother BAS-600 - Page 104

~---P-ro_b_l_e_m ____ ~ll ~ _______ c_a_u_se ______ ~l ~~------c_h_e_c_k ______ ~ll ~------s_o_l_ut_i_o_n ______ ~
Damaged or bent
~ movable knife tip.
Replace movable knife.
Movable
knife tip and
-
needle. plate gap is too
Set gap to 1.5-2.0 mm.
large.
Improper
tension release
Adjust tension release.
- d.
a JUstment.
Needle thread
Improper
spring
Install spring not to strike
trimming
misses
-
~ installation; striking
-
Thread retention
knife bar?
knife bar.
errors
Spring
not
holding
Thread retention
Replace spring.
~
-- --
thread.
section
of spring bent?
- Proper spring
pressure?
1-
See "Adjusting pressure."
Retention
not properly
r--
Height when retention
1-
See"Adjusting retention"
- adjusted.
arm
is raised.
(page
57).
Excessive knife pressure See
II Adjusting
knife
- makes operation heavy.
pressure."
~ Knife tip is too low. Knife position.
See II Adjusting
fixed
-
-
knife" (page 67).
Improper bobbin
See
II Adjusting
fixed
-thread trimming unit
Bobbin thread
trimming misses
installation.
knife"
(page 67).
-
Thread retention
errors
Replace knife. (Exchange
- Burr on knife tip.
movable and fixed
knives.)
.... Knife groove not aligned
Straight line between
knife and needle plate
with needle plate groove. groove when cylinder
retracted.
-100-
From the library of: Superior Sewing Machine & Supply LLC