Bernette Chicago 7 - Trouble Shooting

123
Trouble Shooting
Problem Cause Correction Reference
Needle breaks
• The needle is damaged. – Insert a new needle.
15
• The needle is not correctly inserted. – Insert the needle correctly (flat side
towards the back).
15
• Wrong needle size for the fabric. – Choose a needle to suit the thread
and fabric.
19/20
• The wrong foot is attached. – Select the correct foot.
21
• The needle clamp screw is loose. – Use the screwdriver to tighten the
screw firmly.
15
• The presser foot which is attached is
not appropriate for the selected type of
stitch pattern.
– Attach the presser foot that is appro-
priate for the selected type of stitch.
21
• The upper thread tension is too tight. – Loosen the upper thread tension.
16
Loose stitches
• The machine is not correctly threaded. – Check the threading.
12
• The bobbin case is not correctly
threaded.
– Thread the bobbin case as illustrated.
11
• Needle/fabric/thread combination is
wrong.
– The needle size must suit the fabric
and thread.
19/20
• Thread tension is wrong. – Correct the thread tension.
16
Seam gathers or
puckers
• The needle is too thick for the fabric. – Select a finer needle.
19/20
• The stitch length is adjusted incor-
rectly.
– Readjust the stitch length.
30
• The thread tension is too tight. – Loosen the thread tension.
16
502020.83.11_2013_06_bernette chicago 7_EN