FAULT FINDING CHART

Problem

Probable cause

Possible easy correction

 

 

 

Threads kink

- Upper thread improper threading.

- Re-thread. See page 14

together under the

- Upper tension dial at O position.

- Increase upper thread tension. See page 18

fabric.

 

 

 

- Incorrect needle size.

- Choose correct size needle.

 

- Improper threading.

- Re-thread. See page 14

 

- Loose top thread tension

- Tighten top tension. See page 18

 

- Pulling fabric.

- Gently pull the fabric.

Irregular stitches

- Loose presser foot.

- Re-set presser foot.

 

- Uneven wound bobbin

- Re-wind bobbin. See page 1011

 

- Needle plate broken

- Change needle plate.

 

 

 

- Wrong needle size for the fabric.

- Choose a needle to suit the thread and fabric.

 

- The needle is curving.

- Re-set needle. See page 8

 

- Pulling fabric.

- Gently pull the fabric.

 

- The needle clamp screw is loose.

- Tighten the needle clamp screw.

Breaking needle

- Pattern dial rotation when needle is in the fabric.

- Bring needle to its highest position, before you choose a

 

 

pattern

 

- Loose presser foot.

- Re-set presser foot.

 

- Upper and lower thread not pulled back under

- Pull both threads under and back of presser foot, then

Bunching of thread

presser foot before sewing.

rotate the hand wheel with right hand.

 

- Incorrect thread tension.

- Re-set thread tension. See page 18

 

- Upper thread improper threading.

- Re-thread. See page 14

 

- Using two different sizes or types of thread.

- Use same size and type threads.

Puckering

- Bent or blunt needle.

- Insert new needle.

 

- Loose presser foot

- Re-set presser foot.

 

- Fabric too thin or too soft.

- Use underlay or vlies.

 

- Incorrect size needle.

- Choose correct needle size for thread and fabric. See

 

 

page 20

Skipping stitches

- Bent or blunt needle.

- Insert new needle.

 

- Incorrect setting of needle.

- Re-set needle. See page 8

 

- Improper threading.

- Re-thread. See page 14

 

- Starting to stitch too fast.

- Start to stitch at a medium speed.

 

- Improper threading.

- Re-thread. See page 14

 

- Top thread tension too high.

- Adjust top thread tension. See page 18

 

- Incorrect setting of needle.

- Re-set needle. See page 8

 

- Wrong needles and thread for the fabric.

- Choose correct needle and thread to suit the fabric. See

 

 

page 20

Breaking upper

- Set thread pool and the position indentation at left

- Adjust position of the indentation to right side.

thread

side.

See page 1011

 

- Incorrect setting of bobbin case.

- Re-set bobbin case. See page 38

 

- Needle eye is sharp.

 

- Replace new needle.

 

- Burrs on bobbin.

 

- Sand or change bobbin case.

 

- Burrs on needle hole.

 

- Sand or change needle plate.

 

 

Breaking bobbin

- Down thread improper threading.

- Re-thread. See page 1213

- Down thread tension too high.

- Adjust thread tension. See page 19

thread

- Lint in bobbin or shuttle.

- Clean bobbin case and shuttle. See page 38

 

 

 

- Stitch length in “O” position.

- Adjust stitch length.

 

- Scraps in with feed-dog

- Clean feed dog. See page 38

Fabric not moving

- Sewing thread entangled

- Pull back upper and bobbin thread under presser foot.

 

- Feed dog position down.

- Feed dog position up.

 

 

 

Machine jamming

- Thread caught in bobbin case.

- Remove and clean bobbin case. See page 38

knocking noise

 

 

Sewing machine

- The machine is not plugged in.

- Plug in machine.

doesn’t operate

- Machine is not switched on.

- Switch on machine

Down thread is

- Top thread tension too high.

- Adjust top thread tension. See page 18

pulled above the

- Upper thread improper threading.

- Re-thread. See page 14

cloth.

- Down thread improper threading.

- Re-thread. See page 1213

 

 

 

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AEG aeg11680 instruction manual Fault Finding Chart, Problem Probable cause Possible easy correction