Problem And Remedies - White 734 Operator Instructions Manual

PROBLEM AND REMEDIES
Trouble Probable Cause Remedies
II Machine
Minds
Skipping
Stitch..
Upper thr.ed tension
too loose.
Improper threading.
lobbin not wound
evenly.
Pulling or holding
material.
Not enough tension
on upp.r thread.
Poor quality thread.
Needle too fIn. tot
thread being used.
Starting with take-up
In incorrect position.
Improper setting of
needle.
Bent
or
eye of needle
too diem.
Sent or blunt needle.
Tension, too tight.
Dull ne.die.
Stitch length too long.
Stitch length control
Ia set at other than
Number 5,
Clean and oil machin, the shuttle
area. (Sea page 39.)
Place needle correctly. (See page
10.)
Replace needle or thr.ad to
conform
each other.
(See
page 9.)
Place a piper beneath fabric, or use
Hill Point needle.
Tighten upper
tension.
See threading
Instruction,
peg. 13.
Adjust bobbin winder. (See page 12)
Avoid pulling or holding material, just
ride it.
Increase tension.
Try different thread.
Se. needle and threed chart. page 9.
Refer to threading instructions, see
page 13, and rethr.ed machine.
L.ooin upper thread tension.
Seepage 18.)
Always start sewing with
takeup lever
in highest position.
Refer
to needle
setting
instruction, see
peg.1O.
Try a new needle.
Discard all blunt or bent needles and
replace with new.
See tension adjustment, page 18.
Change needle.
Reduce stitch length.
Set stitch length control at Number 5
Remove needle plete and clean lint from
feed dog.
Thread or lint in raceway.
Bent needle.
Needle placed incorrectly
in
clamp.
Too fine a needie for
thread being used.
Too stretchy fabric.
Replace with new needle. (See page 10j
Irregular
.•'r
''.
Upper Thread
Bribing
.:,..
.
Material
Puc.ring
Machine noisy
• material wil
not feed
In
atiitch
itltchlng.
Improperly tttreeded.
Too much tendon.
If your machine skips stitches only on
certain fabrics,
try all of the procedures on the previous page before
calling a repair-man.
Check the needle plate area, if there are scratches and
marks around the needle hole opening, your machine
is
not being cleaned properly. Always remove the needle
plate and clean the feed dogs periodically, Improper and
lack of cleaning will cause an accumulation of lint which
hampers the feeding mechanism, this
in
turn will cause
the operator to impatiently pull or push the cloth
causing the needle to bend and strike the plate, toot or
hook,
causing
a slip in the timing mechanism.
Continuous
striking will cause defects making
it
necessary to call a serviceman,
Lint In feed dog.