Brother 4234DT Manual De Instrucciones página 13

Chart of thread tension adjustment, Two-needle (Four-thread)
A: Reverse B: Surface C: Left needle thread
C
A
B
A
D
B
C
A
D
B
A
E
F
B
A
F
E
B
A
F
E
B
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D: Right needle thread
Left needle
thread is loose.
Right needle
thread is loose.
Left needle
thread is tight.
Right needle
thread is tight.
Upper looper
thread is tight.
Lower looper
thread is loose.
Upper looper
thread is loose.
Lower looper
thread is tight.
Upper looper
thread is loose.
Lower looper
thread is loose.
E: Upper looper thread F: Lower looper thread
Tighten left
needle thread.
(yellow)
Tighten right
needle thread.
(green)
Loosen left
needle thread.
(yellow)
Loosen right
needle thread
(green)
Loosen upper
looper thread
(pink)
Tighten lower
looper thread
(blue)
Tighten upper
When you adjust the
looper thread
thread tension, do it in the
(pink)
following order:
(1) Left needle thread
Loosen lower
(2) Right needle thread
looper thread
(3) Upper looper thread
(blue)
(4) Lower looper thread
This is the easiest way to
obtain the correct thread
Tighten upper
looper thread
tension.
(pink)
Tighten lower
looper thread
(blue)
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