In sewing operation; thread is supplied from a thread cone. The cone is hold by a cone or spool holder. From the cone, thread reach into the needle by a thread path. It is important to pass the thread through a right path. Otherwise, sewing operation could be hampered. I have written about the thread path of a lock stitch machine in below.
Sequence of Thread Path in a Lock Stitch Sewing Machine: The sequence of thread path of a lock stitch machine is given below.
Thread guide peg
↓
Pre-tensioner
↓
Tension disc
↓
Check spring
↓
Thread guide
↓
Take up lever
↓
Thread guide
↓
Needle with needle eye
So, feed your thread according to the above thread path.
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