SINGER W1624 User Manual

Page 42

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PROBLEM

PROBABLE CAUSE

CORRECTION A

Breaking upper

thread

• Incorrect threading
• Thread jams inside the shuttle.

• Incorrect needle inserting.

• Upper tension too tight.

• For the fabric used, the thread is too thin.

P.5

Remove thread

P.14

P.9

P.15

Breaking lower

thread

• Thread not wound sevenly on the bobbin or not drawn up correctly.

• Lower thread tension too tight.
• Lint stuck in the bobbin case and inside the tension spring.

P.12 P.13

P.10
Remove lint and
clean coit a brush.

Skipping stitches

• Needle not fully inserted.

• Needle bent

• Size or type of needle and thread not suitable for the material.

• Incorrect upper threading.

• Too much oil on the shuttle.

P.14
P.14

P.15

P.5
P.36 and remove

excess oil.

The material

puckers

• Upper or lower thread tension too tight.

• Stitch too long for mterial

• Thread too thick
• Incorrect threading of upper or lower thread.

P. 9 P.10
P.16

P.15
P. 5 P.13

The thread makes

loopers

• Incorrect setting of bobbin case

• Incorrect threading.
• Unbalance tension of upper and lower thread.

P.36
P.5

P. 9 P.10

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