Barudan BEVT Series, Инструкция по эксплуатации

Страница: 162 / 193

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 bobbin 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.
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.
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.
4. As the needle continues to rise, the point of the hook pulls the loop of thread down.
This enlarges the loop.
5. The upper thread encircles the bobbin thread, forming a knot.
6. The knot is then drawn into the fabric by the take-up lever. The knot is tightened by
the upper and lower tensions. The needle reaches its highest point and begins the
downward motion, repeating the entire process.
BE
V
T Series
Mechanical
Guide Machine Basics
1
- 1
2