Chapter 13 Troubleshooting - Brother BAS-364E Instruction Manual

Chapter 13 TROUBLESHOOTING

Chapter 13 TROUBLESHOOTING
List of adjustments
Problem
Presser foot does not rise.
Presser foot does not drop.
Presser foot lift amount is incorrect.
Bobbin thread is wound to one side.
Bobbin thread winding amount is in-
correct.
Thread pulls out.
Needle thread breaks.
Bobbin thread breaks.
Skipped stitches occur.
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Is the presser arm stiff? / Apply some grease to the sliding surface of the
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presser arm.
Is the air hose of the presser lifter cylinder bent or broken? / Straighten
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the air hose or replace it with a new one.
Is the presser arm stiff? / Apply some grease to the sliding surface of the
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presser arm.
Is the air hose of the presser lifter cylinder bent or broken? / Straighten
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the air hose or replace it with a new one.
Is the position of the stepping foot connection rod correct? / Adjust the
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distance from the top of the needle plate to the presser foot while referring
to "Adjusting the presser foot lift amount".
Is the height of the thread tension stud correct? / Adjust the height of the
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thread tension stud while referring to "Winding the lower thread".
Is the position of the bobbin presser correct? / Adjust the height of the
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thread tension stud while referring to " Winding the lower thread ".
Are the differences in thread lengths correct? / Use the sub-tension to
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adjust the thread 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 needle installed incorrectly? / Install the needle so that it faces cor-
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rectly, while referring to "Installing the needle".
Is the thread too thick for the needle? / Select a thread which matches the
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size of the needle.
Are the tension and stroke of the thread take-up spring correct? / Adjust
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the tension and height of the thread take-up spring while referring to "Thread
tension".
Are the rotary hook, needle plate hole or needle damaged or burred?
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/Grind the parts to make them smooth or replace them.
Is the needle thread (decorative thread) breaking because of heat? / Use
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the thread cooler.
Is the thread path correct? / Refer to "Threading the upper thread".
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Is the bobbin thread tension too weak? / Adjust the bobbin thread tension
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while referring to "Thread tension".
Are the rotary hook, needle plate hole or needle damaged or burred? /
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Grind the parts to make them smooth or replace them.
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 the thread path correct? / Refer to "Threading the upper thread".
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Is the needle and rotary hook timing correct? / Adjust while refer-
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ring to "Needle and rotary hook timing".
Have any scraps collected near the rotary hook?/ Clean around
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the rotary hook.
BAS-364E, 366E, 370E, 375E
Check and remedy