Page 258 - CTS - Sewing Technology - TP - Volume - 2-0

SEWING TECHNOLOGY - CITS

TASK 8: Back tack and adjust the tension of upper and lower thread and back tacking
1 While holding the two upper threads with your finger turn the machine pulley by hand towards you until the
lower threads come out on to the feed dog.
2 Pull the lower thread towards you and check that they put out smoothly.
3 Turn on the power switch.
4 Depress the treadle to start sewing. (Fig 1)

Fig 1

Sewing angle
No. of 30° 40° 50° 60° 70° 80° 90° 100° 110° 120° 130° 140°
Stitches
2 4.6 3.8 3.2 2.7 2.2 1.8 1.5 1.1
3 4.6 3.5 3.0 2.5 2.1 1.8 1.5 1.2
4 4.4 3.4 2.8 2.3 1.9 1.6 1.3

5 4.8 3.5 2.7 2.2 1.8 1.5 1.3
6 4.0 2.9 2.3 1.9 1.5 1.3
7 3.7 2.5 2.0 1.6
8 3.0 2.2 1.7

TASK 9: Back tacking during sewing (Fig 1)

Fig 1

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CITS : Apparel - Sewing Technology - Exercise 36 CITS : Apparel - Sewing Technology - Exercise 36