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[skydino]

Skipping Stitches

1. Cause: The machine is not threaded correctly.
Solution: Check whether the upper thread runs correctly from
the spool of thread to the Needle.

2. Cause: An incorrect Needle is used in the machine. The Needle
may be too short or too long.
Solution: Remove the wrong Needle and insert a Needle
recommended for the machine in use.

3. Cause: The Needle is inserted incorrectly in the Needle Bar.
The eye of the Needle is turned in the wrong direction.
Solution: Insert the Needle so that its eye is at a right
angle with the direction of sewing and the short groove of the Needle
faces the point of the Loop Taker (Hook).

4. Cause: The Needle is bent and does not stitch straight into
the fabric.
Solution: Replace the bent Needle with a new straight needle.

5. Cause: Lint or dirt in the Needle hole prevent the Needle
from stitching straight into the fabric.
Solution: Remove lint and dirt from the Needle Clamp, insert
a new straight Needle and tighten firmly the screw which holds the
Needle.

6. Cause: The Needle is too close to the edge of the stitch hole
in the Feed Dog and even strikes the edge of this hole.
Solution: Check whether the Needle is bent. Replace a bent
Needle with a new straight Needle. Check also whether the Feed Dog
Screws are loose and tighten these screws firmly, if necessary.

7. Cause: The stitch hole in the Feed Dog is too large.
Solution: Replace the Feed Dog with one that has a smaller
stitch hole.

8. Cause: The grooves in the Needle are clogged with dirt and do
not permit the loop of the upper thread to form properly.
Solution: Clean the Needle with a soft rag. Be careful not to
bend the Needle.

9. Cause: The slot (or the stitch hole) in the Presser Foot is
too wide (or the stitch hole is too large). This causes the rising
Needle to carry the fabric with it when sewing over thin fabrics,
thus preventing the loop of the upper thread to form properly.
Solution: Replace the incorrect Presser Foot with one having
a correct slot (or stitch hole).

10. Cause: If a one-piece Presser Foot is used, the foot, when
sewing from thick to thin fabrics, or conversely, does not hold the
fabric down firmly.
Solution: Hold the fabric down by hand while sewing, or
replace the one-piece Presser Foot with a Hinged Presser Foot.

11. Cause: The pressure of the Presser Foot upon the fabric is
insufficient. The fabric is not held down firmly.
Solution: Hold the fabric down by hand while sewing, or
replace the one-piece Presser Foot with a Hinged Presser Foot.

12. Cause: The pressure of the Presser Foot upon the fabric is
insufficient. The fabric is not held down firmly.
Solution: Increase the pressure upon the fabric.

13. Cause: The Needle is too close to the edge of the slot (or of
the stitch hole) in the Presser Foot.
Solution: Line up the Presser Foot as follows: Loosen the
screw that holds the Presser Bar in position. This screw is located
behind the Face Plate of the machine. Now turn the Presser Bar until
the Needle goes through the center of the slot (or of the stitch
hole) in the Presser Foot. Tighten firmly the above screw after this
adjustment.

14. Cause: The Bobbin is empty.
Solution: Replace with a filled Bobbin.

15. Cause: The end of the lower thread, which extends from the
Bobbin, is too short and cannot be carried along and brought above
the Feed Dog by the upper thread.
Solution: Pull more thread (about four to five inches) out of
the Bobbin Case.

16. Cause: The upper thread is too heavy for the Needle in use.
Solution: Replace the Needle with one of the correct size.
Consult the "Needle and Thread" chapter.

17. Cause: The Needle is too heavy for the thread in use. The
thread has too much space in the eye of the Needle.
Solution: Replace the Needle with one of the correct size.
Consult the "Needle and Thread" chart.

18. Cause: The thickness of the upper thread is not uniform. The
thread has knots or heavy and thin portions.
Solution: Replace the inferior thread with one of uniform
thickness.

19. Cause: The upper thread may be too soft and does not form a
proper loop underneath the Throat Plate.
Solution: Replace the thread with one of proper quality. Use
a somewhat stiffer thread.

20. Cause: Oil on the upper thread prevents proper formation of
the loop underneath the Throat Plate.
Solution: Remove the oily portion of the thread and prevent
the upper thread from getting soaked with oil. Carefully wipe oil
from Needle, Throat Plate and Loop Taker (Hook) and feed dog.

21. Cause: The Thread Take-up Spring (Check Spring) is not
adjusted correctly. It has too much tension or releases the upper
thread too late.
Solution: Adjust the Thread Take-up Spring. The upper thread
must become loose at the moment the Needle enters the fabric.

22. Cause: The Loop Taker (Hook) is timed too early or too late
in relation to the Needle. If timed too early, the loop of the upper
thread is still too small to be caught and entered by the point of
the Loop Taker. If too late, the loop of the upper thread is already
too large and twists sideways, thereby being missed by the point of
the Loop Taker.
Solution: Make certain that the Needle is pushed all the way
up into the Needle Bar. Also check whether the Needle is timed
correctly in relation to the Loop Taker. For "Timing" follow this
general rule: The Needle must have risen about 3/32 of an inch from
its lowest position at the moment the point of the Loop Taker is just
at the center of the rising Needle. At this moment the point of the
Loop Taker must be about 1/16 of an inch above the eye of the Needle
(see page 00).

23. Cause: The clearance between the Needle and the point of the
Loop Taker (Hook) is too large.
Solution: Bring the point of the Loop Taker closer to the
Needle. The point of the Loop Taker should be set as close as
possible to the needle without touching it.

24. Cause: The point of the Loop Taker (Hook) is blunt, damaged
or broken off.
Solution: If the point of the loop Taker is worn or damaged
to a minor degree only, sharpen it with a fine emery stone or with
fine emery cloth, then polish it with crocus cloth or on a buffing
wheel. The material of the Loop Taker must not be taken off from that
side of the point that faces the Needle. If the point of the Loop
Taker is broken off or if the Loop Taker is defective beyond repair,
replace the old Loop Taker with a new one.

25. Cause: The lower end of the Needle Bar is bent. The Needle,
therefore, does not stitch straight into the fabric.
Solution: If the machine turns easily, bring' the Needle Bar
to its highest position, then tap the Needle Bar lightly with a
hammer until the Needle goes through the center of the stitch hole in
the Feed Dog.

26. Cause: The Needle Bar or Needle Bar Frame is badly worn. The
Needle Bar is too loose in its bearings and sways sideways.
Solution: Replace the worn Needle Bar with a new one. Replace
also worn Needle Bar Frame.

27. Cause: The Needle Bar has play (lost motion) in vertical
direction. This may be due to the Needle Bar linkage being badly worn.
Solution: Replace the worn and defective parts with new ones.

28. Cause: The Throat Plate is not flat, but is slightly bent
downward due to repeated dropping of the Presser.
Solution: If facilities for repairs are available, place the
old Throat Plate, top surface down, on a flat surface (surface plate)
and straighten it by tapping it carefully with a hammer. If badly
defective, replace the old Throat Plate with a new one.

29. Cause: The bottom surface of the Presser Foot does not rest
fully (flush) upon the fabric.
Solution: Check whether there is lint or dirt between the
Presser Foot and the Presser Bar. Remove lint or dirt and tighten
firmly the Presser Foot Screw. Check whether the Presser Foot rests
upon the machine. If the Presser Foot is defective, replace it with
a Foot that rests with its entire bottom face upon the machine.

30. Cause: The type of fabric to be sewn makes the formation of
the loop of the upper thread difficult. The fabric may also be sticky
and, therefore, does not permit the proper formation of the loop of
the upper thread.
Solution: Experiment with various grades of threads and
needles, until a proper stitch can be obtained. It may also be
necessary to adjust the Loop Taker (Hook) in relation to the Needle
in such a manner that a proper stitch can be obtained. Sometimes it
will help to give a different tension to the upper thread or to the
Thread Take-up Spring (Check Spring).

[KiteSquid]

WOW, you said 30 mouthfulls!!!!!!

Great stuff there!!!!

Words of wisdom!!!!!




But, in some places that you say "Feed Dog" I think you ment to say "Throat Plate"

I think that the feed dogs are the toothed parts that move the fabric forward and back and the Throat Plate is then stationary plate that has the hole in it for the needle to pass thru.

I could be wrong......
_________________
VR/
KiteSquid
AKA TakoIka
AKA Harold
King George VA


P.S. Yet another post by the Squid..... Doesent he ever shut up???

P.P.S. The wind is like the air, only pushier.