Question

SUBJECTIVE QUESTIONS
1. Explain the following:
(i) Puckering of fabric
(ii) Causes of upper thread breaking
(ii) Presser foot
(iv) Tension regulator
(v) Loop formation during stitching
2. (i) Explain the causes of machine running heavily and its
(i) How can we take care of our sewing machine properly
3. Draw the diagram and label the parts of a sewing machin
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Answer 1

Answer:

Hii..!

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1.

(i)Puckering of fabric:-

1. Set Machine and Bobbin Thread. Use a normal stitch length (8-9 stitches per inch). Use sewing thread in the needle.

1. Stitch. Machine stitch five or six rows on a sample of your fabric. It will not look too puckered at this point.

3. Steam. After the piece is completed, place it on the ironing board wrong side up.

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(ii)

Causes of upper thread breaking:-

• Your Thread Tension Is Too Tight.

• Your Thread Is Poor Quality.

• Your Needle Is Damaged, Bent, or Dull.

• You Are Not Using the Correct Needle.

• Your Needle Is Not Inserted Correctly.

• Your Take-Up Lever Spring Is Broken.

• Your Bobbin Case Is Full of Lint.

• You Are Sewing Too Fast.

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(iii) Presser foot:-

Presser foot is a forked, metal device on a sewing machine used for holding the fabric in place while stitching.

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(iv) Tension regulator:-

A Tension Regulator is a device used to control tension during the manufacture or handling of wire or cable. It is used primarily to control tension of cable being wound on to a reel or between sheaves in a coordinated drive system.

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(v) Loop formation during stitching:-

During sewing the needle descends through the fabric to the bottom of its stroke and as the needle rises a loop of sewing thread is formed in the scarf of the needle. This loop of sewing thread is picked up by one of two stitch forming devices namely the hook or the looper.

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2.

(i) Causes of machine running heavily:-

1. If the machine sounds or feels like it is working too hard after inactivity, it may be gummed up with oil and be in need of a general cleaning.

2. The belt may be too tight and therefore puts excessive pressure on the bearings.

3. If the belt is too loose, it slips on the balance wheel.

4. Thread is jammed in the bobbin case.

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3.

Refer attachment above for your 3rd Question answer!

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Hope it helps you dear!

Answer 2

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1.

(i)Puckering of fabric:-

1. Set Machine and Bobbin Thread. Use a normal stitch length (8-9 stitches per inch). Use sewing thread in the needle.

1. Stitch. Machine stitch five or six rows on a sample of your fabric. It will not look too puckered at this point.

3. Steam. After the piece is completed, place it on the ironing board wrong side up.

----------------------------------------

(ii)

Causes of upper thread breaking:-

Your Thread Tension Is Too Tight.

Your Thread Is Poor Quality.

Your Needle Is Damaged, Bent, or Dull.

You Are Not Using the Correct Needle.

Your Needle Is Not Inserted Correctly.

Your Take-Up Lever Spring Is Broken.

Your Bobbin Case Is Full of Lint.

You Are Sewing Too Fast.

----------------------------------------

(iii) Presser foot:-

Presser foot is a forked, metal device on a sewing machine used for holding the fabric in place while stitching.

----------------------------------------

(iv) Tension regulator:-

A Tension Regulator is a device used to control tension during the manufacture or handling of wire or cable. It is used primarily to control tension of cable being wound on to a reel or between sheaves in a coordinated drive system.

----------------------------------------

(v) Loop formation during stitching:-

During sewing the needle descends through the fabric to the bottom of its stroke and as the needle rises a loop of sewing thread is formed in the scarf of the needle. This loop of sewing thread is picked up by one of two stitch forming devices namely the hook or the looper.

----------------------------------------

2.

(i) Causes of machine running heavily:-

1. If the machine sounds or feels like it is working too hard after inactivity, it may be gummed up with oil and be in need of a general cleaning.

2. The belt may be too tight and therefore puts excessive pressure on the bearings.

3. If the belt is too loose, it slips on the balance wheel.

4. Thread is jammed in the bobbin case.

----------------------------------------

3.

Refer attachment above for your 3rd Question answer!

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