Trouble Shooting Guide - SilverCrest SNMD 33 A1 Instructions D'utilisation Et Consignes De Sécurité

Trouble shooting guide

Problem Cause
Upper thread 1.The machine is not threaded correctly.
breaks 2.The thread tension is too tight.
3.The thread is too thick for the needle.
4.The needle is not inserted correctly.
5.The thread is round wound the spool
holder pin.
6.The needle is damaged.
Lower thread 1.The bobbin case is not inserted
breaks correctly.
2.The bobbin case is threaded wrongly.
3.The lower thread tension is too tight.
1.The needle is not inserted correctly.
Skipped
stitches 2.The needle is damaged.
3.The wrong size needle has been
used.
4.The foot is not attached correctly.
Needle breaks 1.The needle is damaged.
2.The needle is not correctly inserted.
3.Wrong needle size for the fabric.
4.The wrong foot is attached.
Loose stitches 1.The machine is not correctly threaded.
2.The bobbin case is not correctly
threaded.
3.Needle/ fabric/ thread combination is
wrong.
4.Thread tension wrong.
Seams gather 1.The needle is too thick for the fabric.
or pucker 2.The stitch length is wrongly adjusted.
3.The thread tension is too tight.
Uneven stitches, 1.Poor quality thread.
uneven feed 2.The bobbin case is wrongly
threaded.
3.Fabric has been pulled.
The machine is 1.The machine must be lubricated.
noisy 2.Fluff or oil have collected on the
hook or needle bar.
3.Poor quality oil has been used.
4.The needle is damaged.
The machine Thread is caught in the hook.
jams
Correction
1.Rethread the machine.
2.Reduce the thread tension. (lower number)
3.Select a larger needle.
4.Remove and reinsert the needle. (flat side
towards the back)
5.Remove the reel and wind thread onto reel.
6.Replace the needle.
1.Remove and reinsert the bobbin case and
pull on the thread. The thread should pull
easily.
2.Check both bobbin and bobbin case.
3.Loosen lower thread tension as described.
1.Remove and reinsert needle. (flat side
towards the back)
2.Insert a new needle.
3.Choose a needle to suit the thread and
fabric.
4.Check and attach correctly.
1.Insert a new needle.
2.Insert the needle correctly. (flat side
towards the back)
3.Choose a needle to suit the thread and
fabric.
4.Select the correct foot.
1.Check the threading.
2.Thread the bobbin case as illustrated.
3.The needle size must suit the fabric and
thread.
4.Correct the thread tension.
1.Select a finer needle.
2.Readjust the stitch length.
3.Loosen the thread tension.
1.Select a better quality thread.
2.Remove bobbin case and retread and
insert correctly.
3.Do not pull on the fabric while sewing, let
it be taken up by the machine.
1.Lubricate as described.
2.Clean the hook and feed dog as described.
3.Only use good quality sewing machine oil.
4.Replace the needle.
Remove the upper thread and bobbin case,
turn the handwheel backwards and forwards
by hand and remove the thread remands.
Lubricate as described.
Maintenance
GB/ IE 91