Sewing machine parts Single Needle 1.ppt

About the Parts and functions of Sewing machine

1. SEWING MACHINE PARTS AND
THEIR FUNCTIONS

2. SEWING MACHINE CLASSIFICATION
Applications
•Straight seams, zigzag seams
•Blind stitch machine for blind stitch &
hemming
*Linking machine attaching trimming and
cuff of knitted fabrics
*Edge neatening, combined neatening and seam
closing
*Safety stitching
*Specific sewing operation
*Automatic, complex sewing operation
Machine types
1.Lock stitch machine
2.Chine stitch machine
3.Double chain stitch machine
1.Blind stitch machine
2.Linking machine
1.Over edge machine
2.Safety stitch machine
1.Buttonhole machine
2.Button sewing machine
3.Bar tack machine
1.Profile sewer
2.Pocket sewer

3. •The bed is the lower portion of the machine
under which the feed mechanisms and
loopers are located. Sewing machines are
frequently described by bed types.
Different Types of Machine Beds

4. TYPE OF SEWING
MACHINE BED
STITCH TYPE
FLAT BED SEWING MACHINE
(BASIC)
LOCK STITICH, CHAIN STITCH
RAISED BED MACHINE LOCK STITICH, CHAIN STITCH
POST BED MACHINE LOCK STITICH, CHAIN STITCH
CYLINDER BED MACHINE LOCK STITICH, CHAIN STITCH
SIDE BED MACHINE /FEED-
OFF-THE-ARM BED
CHAIN STITCH, OVER EDGE
STITCHES

5. Different Types of Machine Beds

10. 1. Reverse Lever

11. The reverse lever allows you to stitch in reverse. We use
reverse to make our stitches secure at the beginning and
end of seams.

12. 2. Pattern Selector

13. The pattern selector lets you determine what
kind of stitch you will be making, such as
straight stitches or an embroidery stitch or
zig-zag.

14. 3. Stitch Length

15. Stitch length determines the length of the stitch
The range on our machine is from 0 to 4.
 0 the shortest stitch, 4 the longest.
The stitch length adjustment adjusts the length of the stitches
your sewing machine makes. The adjustment takes place at the
feed dog not the machine needle.
Shortening the stitch length shortens the amount of fabric that
is fed under the presser foot before the needle comes down.
Lengthening the stitch length lengthens the amount of fabric
that is fed under the presser foot before the needle comes down.

16. 4. Bobbin Winder

17. The bobbin winder winds
the thread from the spool
to the bobbin,
mechanically.

18. 5. Spool Pin

19. Spool pin holds the spool of thread.

20. 6. Thread Tension

21. Thread tension determines the
tightness or looseness of the stitch.
Tensions disks control the amount
of pressure applied to the thread for
an even feed to the machine needle
causing an evenly formed stitch.

22. 7. Pressure Dial

23. The pressure dial determines
how much pressure the presser
foot will have on the fabric.
More pressure may be needed
for light weight fabrics, and
less pressure for heavy, or thick
fabrics.

24. 8. Face Plate

25. The face plate is a cover that covers all the
inner working parts of the sewing
machine.

26. 9.Check Spring Holder

27. The check spring holder is actually
hidden in machines. It works with the
thread tension to slow down the
amount of the thread going to the
needle.

28. 10. Sewing Light

29. The sewing light helps you to thread the
needle and to see your stitching; both day
and night.

30. 11. Feed Dogs

31. Feed dogs are a “teeth-like”part that works with the
presser foot to pull your fabric through the machine.
The feed dog feeds the fabric under the presser foot
while you guide the fabric.
The feed dog regulates the stitch length by how much
fabric passes under the presser foot as the machine
stitches.
It is important for you to not push and pull the fabric
under the presser foot. Allow the feed dog to move the
fabric, so that you do not bend and break sewing machine
needles.

32. BOBBIN CASE
•The sewing machine bobbin case may be
removable from the sewing machine or it
may be built in to the sewing machine.
•Bobbin cases are not interchangeable in
different sewing machines.

33. BOBBIN
•The bobbin provides the thread for the underside
of the stitches a sewing machine forms.
•Bobbins are not interchangeable between sewing
machines.
•Bobbins are filled on the bobbin winder and the
thread should be evenly distributed on the bobbin.

34. 12. Throat Plate

35. The throat plate has stitching guide lines on it
and has a hole for the needle to pass through
to the bobbin casing.
The throat plate is a removable part, which
protects the bobbin and underside of the
sewing machine.

36. 13. Slide Plate

37. The slide plate is a clear plastic cover that covers
the bobbin case to keep dust and dirt out of the
moving parts area of the bobbin case.
The sewing machine slide plate provides access to
the bobbin area of a sewing machine and protects
the bobbin area from thread and fabric being caught
in moving parts when the machine is operating.
Most slide plates do slide out of the way to access
the bobbin but some have a button or lever to
release the slide plate

38. 14. Presserfoot

39. The presser foot holds the fabric against the feed
dogs; so the feed dogs can pull your fabric
through the machine.
The presser foot exerts downward pressure on the
fabric as it is fed under the needle.

40. 15. Needle Clamp

41. The needle clamp is a black
clamp that tightens to hold the
needle in place.

42. THREAD CUTTER

43. THREAD CUTTERS
•Sewing machine thread cutters are usually located
behind the needle area of the sewing machine, so
that it is convenient as you remove fabric to the
back of the machine, you can cut the thread with
the thread cutter.
•The sewing machine thread cutter does not cut the
thread close to the fabric. You still need to trim
the thread with scissors close to the fabric.

44. 16. Presser foot Lifter

45. The presser foot lifter gently lifts the presser foot up
and lowers it against the feed dogs.
When the presser foot lever is in the upward position,
the tension disks are disengaged.
When the presser foot lever is down the tension disks
are engaged.
Note: the presser foot must be lowered before you
begin to sew; or fabric will not move through the
machine!

46. 17. Take-Up-Lever

47. The take-up-lever pulls the thread back after
each stitch, so that the stitches will lay evenly
into the fabric.

48. 18. Handwheel

49. The hand wheel raises and lowers the needle. You
must always pull the hand wheel towards yourself to
prevent tangling of the threads.
The main purpose of a hand wheel on a sewing
machine is to slowly turn the needle by hand.
This gives you control to position fabric under the
needle and align fabric to guides built into the
machine

50. 19. Clutch Knob

51. The clutch knob is located inside of the
hand wheel. It is a safety feature of the
sewing machine that when pulled out,
prevents the needle from jabbing up
and down when winding a bobbin.

52. 20. Power Switch

53. The power switch turns on the
power on the sewing machine and
also turns off the power,
electrically.

54. 21. Power Socket

55. The power socket connects the power
source to the sewing machine.

56. 22. Foot Pedal

57. The foot pedal operates the speed of the
sewing machine, electrically.

58. 23. Thread Cutters

59. The thread cutters cut the threads at the
end of a row of stitching to disconnect
your fabric from the sewing machine.