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For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Upper thread is not threaded correctly
Correctly thread the machine
o
Upper thread tension is to tight
Reduce upper thread tension
o
Needle is not installed correctly
Install needle correctly
o
Needle is bent or worn
Replace the needle
o
Presser foot height is incorrect
Adjust presser foot height to thickness of material
o
Presser foot has nicks or burrs on it
Replace presser foot
o
Needle is hitting the needle plate
Reposition needle plate
o
Presser foot is not correctly positioned to the needle plate
o
Align presser foot to hole in the needle plate
Rotary hook is dirty or needs to be oiled
Clean and oil rotary hook
o
Rotary hook over oiled
Clean excess oil from rotary hook
o
Needle bar(s) over oiled
Clean excess oil from needle bar(s)
o
Bobbin thread is not wound correctly
Replace bobbin
o
Bobbin case is damaged
Change bobbin case
o
Scratches on the sliding surface of the rotary hook
Smooth scratches or replace rotary hook
o
Poor quality thread
Replace thread
o
Fabric is not taut in the hoop
Re-hoop garment
o
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Upper thread breaks
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   Summary of Contents for Brother BAS-401

  • Page 1

    For Technical Assistance Please Call Toll Free 1-877-4BROTHER Upper thread breaks Upper thread is not threaded correctly Correctly thread the machine Upper thread tension is to tight Reduce upper thread tension Needle is not installed correctly Install needle correctly Needle is bent or worn Replace the needle Presser foot height is incorrect Adjust presser foot height to thickness of material...

  • Page 2

    Wrong type of backing Use the correct backing for garment Design contains many small stitches of .2 mm or less Modify design to eliminate stitches of .2mm or less Too much density in design Reduce density in design The area around the hole in the needle plate is damaged Replace needle plate Rotary hook is out of time Re-time rotary hook...

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