SINGER W1717 - Manual (Page 27)

21. TROUBLE CHART
PROBLEM PROBABLE CAUSE
‘^ORRECTioiTl
Breaking lower Thread not wound evenly on the bobbin
P. 10, P. 1 5
thread or not drawn up correctly
Lower thread tension too tight
P.12
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. 6^^ ....
Needle bent
P. 6
Size or type of needle and thread not
suitable for the material
P.16
Incorrect upper threading
P.13
Too much oil on the hook P.46
Irregular stitches Incorrect size of needle for the material
P.16
Upper thread tension too loose P.20
Incorrect lower tension P.12
The material not Pattern selection dial not set correctly P.17
fed correctly
Incorrect feed dog height P.12
Lint stuck on the feed dog P.45
""P roblem
PROBABLE CAUSE CORRECTION
material
Upper or lower thread tension too tight P.12, P.20
puckers
Stitch too long for material P.18
Thread too thick P.16
Incorrect threading of upper or lower thread P.13, P.11
Breaking
needle
Needle not correctly inserted P. 6
Needle bent P, 6
Needle clamp screw too loose P. 6
Upper thread tension too tight P.20
Needle too fine for the material P.16
Dials have been changed while the needle
was down in the material
P.18, P.22
Zigzag width set more than 2.5 while twin
needle was attached P.14
l î t r O U U I C t o ..............................................- --------------- -
Do not try to correct fault by yourself.,
. 4 7 -
Changing Light Bulb
Unplug the machine.
Open face cover as shown.
Remove bulb by unscrewing it
in counterclockwise.
Install a new bulb by screwing it
in clockwise.