Needle Anatomy
The anatomy of the needle is an important factor in forming
stitches.
Eye Carries the top thread through the
fabric and into the Hook
Assembly.
Scarf Small notch, or cutout, on the back
of the needle that provides the
clearance needed for the hook
point to pass without striking the
needle during stitch formation. When installed, the scarf should
always be facing towards the back of the machine.
Groove Small groove, or channel, on the front of the needle that provides
the thread a place to sit, protecting it as the needle penetrates the
fabric. When installed, the Groove should always be facing towards
the front of the machine.
How Stitches Are Formed
1. The needle starts downward and penetrates the fabric.
2. The needle reaches its lowest point, then begins to rise, forming a loop of thread
behind the needle.
3. As the needle rises, the hook point passes behind the scarf, picking up the loop of
thread from the back of the needle.
1-18 X Series Mechanical Guide
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