Trouble Shooting Guide - Silvercrest SNM 33 C1 Operation And Safety Notes

Maintenance

Trouble shooting guide

Problem Cause
Upper thread 1.The machine is not threaded
breaks correctly.
2.The thread tension is too tight.
3.The thread is too thick for the needle. 3.Use a larger needle.
4.The needle is not inserted correctly.
5.The thread has become wound
around the bobbin winder spindle (14).
6.The needle is damaged.
Lower thread
breaks 1.The bobbin case is not inserted
correctly.
2.The bobbin case is threaded wrongly. 2.Check both bobbin (g) and bobbin case.
Skipped stitches 1.The needle is not inserted correctly.
2.The needle is damaged.
3.The wrong size needle has been
used.
4.The wrong presser foot is installed.
Needle breaks
1.The needle is damaged.
2.The needle is not correctly inserted.
3.Fabric too thick/ needle size wrong.
4.The wrong presser foot is attached.
Loose stitches
1.The machine is not correctly threaded. 1.Thread the machine correctly.
2.The bobbin case is not correctly
threaded.
3.Needle/ fabric/ thread combination is
wrong.
4.Thread tension wrong.
Seams gather
or pucker 1.The needle is too thick for the fabric.
2.The stitch length is wrongly adjusted.
3.Fabric puckers.
Uneven
stitches, 1.The thread is too weak.
uneven feed
2.The bobbin case is wrongly threaded. 2.Rethread the bobbin case and insert
3.Fabric has been pulled when sewing. 3.Do not pull on the fabric. It must be
The machine is
noisy 1.The machine must be lubricated.
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
28 US-EN
Correction
1.Rethread the machine.
2.Reduce the thread tension (3). (lower
number)
side towards the back)
5.Remove the bobbin (g) and unwind the
thread.
6.Replace the needle.
1.Remove and reinsert the bobbin case
and pull on the thread. The thread
should pull easily.
towards the back)
2.Replace the needle.
3.Choose a needle size to suit the thread
and fabric.
4.Use the correct presser foot.
1.Replace the needle.
towards the back)
3.Choose a needle size to suit the thread
and fabric.
4.Use the correct presser foot.
4.Remove and reinsert the needle. (flat
2.Thread the bobbin case as illustrated.
3.The needle size must suit the fabric and
thread.
4.Correct the thread tension.
2.Check the thread tension.
1.Remove and reinsert needle. (flat side
fabrics.
1.Use stronger thread.
correctly.
automatically moved by the machine.
1.Lubricate as described.
2.Insert the needle correctly (flat side
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 (21) backwards
and forwards by hand and remove the
thread remains. Lubricate as described.
1.Use a finer needle.
3.Use a backing for fine or stretchy