SINGER W1999 - Manual (Page 60)

Page 52
English
Section
7
7. TROUBLE CHART
PROBLEM PROBABLE CAUSE CORRECTION
Breaking lower thread Thread not wound evenly on the bobbin or not drawn up correctly P.19, P.7, 8
Lower thread tension too tight P.56, 57
Lint stuck in the bobbin case and inside the tension spring Remove lint and fluff
with a cleaning brush
Skipping stitches Needle not fully inserted P.22
Needle bent or burred P.22
Eiize or type of needle and thread not suitable for the material P.24
incorrect upper threading P.7
Too much oil on the machine P.50
Irregular stitches Incorrect size of needle for the material P.24
Upper thread tension too loose P.16
Incorrect lower tension P.56, 57
The material not fed Pattern selection dial not set correctly P.26
correctly Feed teeth are down p.48
Lint stuck on the feed teeth P.49
Noisy machine Check for thread in shuttle, the slightest amount of thread in P.49
shuttle may cause noise or binding, use material like tooth
pick or cotton swab to clean. P.58