Page 243 - CTS - Sewing Technology - TP - Volume - 2-0

SEWING TECHNOLOGY - CITS

Fig 5
Fig 10

TASK 5: Change the number of stitches in the button hole machine

1 The number of stitches in button hole decided by the combination of speed gear. Details are given in the
following table. Select the speed gear and decides the number of stitches in the button hole.
2 In the table alphabetical marks like A, B, C etc., numerals like 132, 152 etc., are both engraved on each speed
gear for identification. Use combination of gears which have the same alphabetical marks.
3 The numerical engraved on the gear installed in the rear position will represent the number of stitches provided
by the combination of speed gear as shown in the table.

Practice on operations of bar tack machine
Objectives : At the end of this exercise you shall be able to
• wind the lower thread on bar tacking machine
• practice upper threading on bar tacking machine
• fix the bobbin case on bar tacking machine
• practice sewing on bar tacking machine and adjust the thread tension

TASK 1 : Wind the lower thread on bar tack machine.

1 Place the bobbin all the way onto the shaft.
2 Fix the sewing thread cone at the spool pin and thread through the thread guide and tensioner and wind
the thread around the bobbin several times in the direction of the arrow, and then press the bobbin presser.
(Fig 1).

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CITS : Apparel - Sewing Technology - Exercise 36