A plain stitch machine is a type of sewing machine that creates a simple, straight stitch. Here's how the working principle of a plain stitch machine generally works:
1. Thread
supply: The machine is equipped with a spool holder and a bobbin case that hold
the upper thread and lower thread, respectively. The upper thread is supplied
from a spool placed on the spool holder, while the lower thread is wound around
a bobbin that sits in the bobbin case
2. Thread
tension: The upper thread passes through a tension assembly that controls the
tension of the thread. The correct tension is necessary to ensure that the
stitches are uniform and not too loose or too tight.
3. Needle
movement: The needle is attached to a mechanism that moves it up and down
through the fabric. The needle is driven by a motor or hand-cranked mechanism
that rotates the needle bar.
4. Fabric
feed: The fabric is fed through the machine by a set of feed dogs that grip the
fabric and move it forward as the needle descends. The speed and direction of
the feed dogs can be adjusted to control the stitching.
5. Stitch
formation: As the needle descends through the fabric, it creates a loop of
upper thread that interlocks with a loop of lower thread from the bobbin. This
interlocking of threads creates the straight stitch that is characteristic of a
plain stitch machine.
6. Stitch
length: The length of the stitch is determined by the distance between the
needle and the feed dogs. The stitch length can be adjusted to create longer or
shorter stitches, depending on the requirements of the sewing project.
In summary, a plain stitch
machine works by using a needle to create a straight stitch that interlocks
with a lower thread from a bobbin, while the fabric is moved forward by feed
dogs. By adjusting the thread tension, stitch length, and fabric feed, the
machine can create a variety of different stitch patterns for different types
of sewing projects.
0 Comments
kindly don't leave any spam links.