Concetti Chiave
- The balance wheel controls the sewing motion and adjusts the needle's position by turning forward or backward.
- The presser foot secures the fabric in place during stitching.
- The feed-dog moves the fabric by pulling it along as it rises and falls, working through the throat plate slots.
- The spool pin and thread guides maintain proper thread placement and prevent twisting.
- The bobbin and bobbin case manage the lower thread supply for stitching operations.
Functions of sewing machine parts
A sewing machine has many parts. Each has certain functions:
1. Balance wheel - it is turned either forward or backward to make the machine sew; it raises and lowers the needle.
2. Presser foot - it holds the fabric firmly in place for stitching.
3. Pressed foot lifter - it is used to raise and lower the presser foot; it is found at the back of the machine.
4. Feed-dog - it holds the fabric against the presser foot; it pulls the fabric along for stitching as it moves up and down; it is a tooth-like piece of metal just under the presser foot. It works up and down through the slots in the throat-plate.
5. Throat plate - provides slots or openings through which the needle projects down-ward and the feed-dog upward.
6. Spool pin - this holds the spool of the thread.
7. Thread guides - these support the thread from one part of the machine to another; they prevent the thread from twisting.
8. Needle clamp - it is an attachment for the needle.
9. Stitch regulator - it is used to shorten or lengthen the stitches or the machine.
10. Bobbin - it is used for winding the thread which goes in the lower part of the machine.
11. Bobbin case - it is the case that holds the bobbin.
12. Stop motion screw - this is loosened to disconnect the needle and stop it from moving when the machine is operated; it is at the balance wheel.
13. Tension discs - this regulated the tightness of the thread as it forms the stitch.
Domande da interrogazione
- What is the role of the balance wheel in a sewing machine?
- How does the feed-dog contribute to the sewing process?
The balance wheel is crucial for sewing as it is turned either forward or backward to make the machine sew, and it also raises and lowers the needle.
The feed-dog holds the fabric against the presser foot and pulls it along for stitching by moving up and down through the slots in the throat plate, ensuring smooth fabric movement.
Accedi a tutti gli appunti
Tutor AI: studia meglio e in meno tempo
