Grade 7: Types of Sewing Machine (4)


A well-selected sewing machine is essential for achieving good results. It should be used correctly by the job requirements.

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1. Lockstitch Sewing Machine. This is usually used in homes and sometimes in school. This is also called ―Domestic Sewing Machine‖. It is run on foot and may also be converted to an electric power machine



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2. Hi-Speed Lockstitch Sewing Machine. This is sometimes called a „straight stitching machine‖ or an industrial sewing machine. It has automatic lubrication and is used by tailors and dressmakers




3. Over Edging Machine. Other companies call it small machine‖. It finishes the raw edges of the pattern for construction.



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4. Embroidery Machine. This is used to make fancy stitches and different embroidery stitches on fabrics for the Barong Tagalog, pillowcases, linen, and other novelty items. 


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5. Button Holer Machine. This is used in making buttonholes on garments
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6. Button Attachment Machine. This is used in attaching buttons to the garments.

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7. Double Needle Machine. This is used in constructing the different kinds of clothing, especially for the inseam, outseam, and side seam.



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8. Bartacking Machine. This is used in reinforcing the opening and closing of pockets 

Two Major Parts of the Lockstitch Sewing Machine The two major parts of the lock stitch sewing machine are the upper and lower parts.


The Upper Parts is composed of:

1. Head is the complete sewing machine without a cabinet or stand.

2. Arm is the curve part of the head containing the mechanism for operating the needle.

3. Bed is the flat portion of the machine, and beneath is the feed dog where it is mounted, and the shuttle and lower thread are placed.


Parts of the Sewing Machine in the Arm


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1. Spool Pin is the thread holder.

2. Thread Guide keeps the thread in position.

3. Thread Take-up Lever releases the thread and interlocks with the bobbin thread.

4. Presser bar lifter moves the presser foot.

5. Tension controls the looseness and tightness of stitches.

6. Needle Bar holds the needle in place.

7. Needle Clamp holds and tightens the needle.

8. Presser Foot holds the fabric in place while sewing.

9. Needle is a slender tool attached to the needle clamp used for sewing.

10. Bobbin Winder controls the bobbin while winding thread.

11. Stitch regulator checks the length of the stitches.

12. Balance Wheelsets the mechanism in motion.

13. Belt connects the balance wheel to the drive wheel.

14. Stop Motion Screw hinders moving when loosened and starts



Parts of Sewing Machine under the Bed



1. Feed Dog - moves the fabric while sewing.

2. Throat plate -is the windows of the feed dog, and it is

Where the bobbin threads come out.

3. Slide plate - is a movable plate that covers the shuttle

And bobbin case.

4. Shuttle - holds the bobbin case while sewing.

5. Bobbin - is a metal spool for the winding thread.

6. Bobbin Case - holds the bobbin.



The Lower Parts of the Lock Stitch Sewing Machine


The lower parts of the sewing machine are the cabinet and the stand. The cabinet has drawers and screws on the hinges for the attachment of the head.

The following are the lower parts of the sewing machine and their uses:


1. Band Wheel - leads the balance wheel through the belt connection.

2. Band Wheel Crank moves the band wheel.

3. Pitman Rod - holds the treadle to band wheel crank.

4. Belt Guide - holds the belt to its place.

5. Belt Shifter - removes the belt from the wheel.

6. Dress Guard - protects the dress from the wheel.

7. Treadle - is where the feet are stationed to drive the band wheel through the pitman rod.

8. Legs - support the cabinet of the machine.

9. Cabinet - holds the head of the machine by an interlocking screw on the hinges.


THREADING THE MACHINE 


Each part of the threading mechanism on the head of the sewing machine has a definite purpose in guiding the thread from spool to the needle. The thread must pass through the various guide in a given order so that the machine will sew properly and form stitches.


A. Order of threading on the Upper Part


1. Spool Pin

2. Upper Thread Guide

3. Between Metal Disc and Tension

4. Thread Take-up Lever

5. Lower Thread Guide

6. Needle


B. Threading the Lower Part of the Sewing Machine


1. Remove the bobbin case

2. Remove the bobbin from the bobbin case and wind the thread.

3. Put the bobbin back to the bobbin case and pull the thread through the little slot at least 4 inches.

4. Place the bobbin case inside the shuttle.

5. Roll the balance wheel forward to get the thread of the bobbin through the needle.

6. Pull the upper and the lower thread together by 4 inches.


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