Brother BAS-364E Instruction Manual page 66

Problem
Needle breaks.
Needle thread is not trimmed.
Thread is tangling.
Poor seam finish on underside of
material.
Poor thread tightening.
Needle thread lengths are uneven.
Is the needle touching the rotary hook? / Adjust while referring to "Needle
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and rotary hook timing" and "Adjusting the needle clearance".
Is the needle bent or the needle tip broken? / Replace the needle.
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Is the needle installed incorrectly? / Install the needle correctly, while re-
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ferring to "Installing the needle".
Is needle deflection occurring? / Select a needle which matches the ma-
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terial being sewn, or reduce the sewing speed.
Is the needle too thin? / Select a needle which matches the material being
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sewn.
Is the thread trimming timing correct? / Change the thread trimming tim-
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ing.
Is the fixed knife blunt? / Sharpen the fixed knife or replace it with a new
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knife.
Is the movable knife picking up the needle thread? / Adjust while referring
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to " Needle and rotary hook timing ".
Is the tension of the sub-tension correct? / Turn the nut to adjust to a
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suitable tension.
Is the needle and rotary hook timing correct? / Adjust while referring to
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"Needle and rotary hook timing".
Are the threads being separated correctly at the rotary hook holder posi-
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tion? / Adjust while referring to "Adjusting the inner rotary hook bobbin
case holder position".
Are the thread lengths correct? / Use the sub-tension to adjust the thread
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lengths while referring to "Thread tension".
Is the needle thread tension too weak? / Adjust the needle thread tension
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while referring to "Thread tension".
Is the bobbin thread tension too weak? / Adjust the bobbin thread tension
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while referring to "Thread tension".
Is the tension of the sub-tension correct? / Adjust the sub-tension while
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referring to "Thread tension".
Is the fixed knife correct? / Sharpen the fixed knife or replace it with a new knife.
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BAS-364E, 366E, 370E, 375E
Chapter 13 TROUBLESHOOTING
Check and remedy
60