The working principle of sewing machine, how sewing machine sews clothes.

The working principle of a sewing machine involves a coordinated effort of various mechanisms to create stitches on fabric. Here's a simplified explanation of how it works:

Needle and Thread Mechanism: A sewing machine uses two separate threads. The needle, attached to a needle bar driven by the motor, moves up and down. The eye of the needle, located near its point, carries the top thread through the fabric, creating a loop on the other side.

Bobbin and Shuttle Mechanism: Below the fabric, a bobbin releases the bottom thread. A shuttle with a hook, rotating in sync with the needle's movement, catches the loop created by the top thread and wraps it around the bottom thread from the bobbin.

Creating Stitches:

Chain Stitch: In this stitch, the machine loops a single thread back on itself. The fabric is held down by a presser foot. As the needle pulls a loop of thread through the fabric, a looper mechanism grabs this loop before the needle rises. The new loop of thread passes through the earlier loop, linking them like a chain.
Lock Stitch: More common in sewing machines, this stitch involves both the top and bottom threads. The needle creates a loop through the fabric, which is then caught by the shuttle hook and wrapped around the bobbin thread. This method produces a sturdy and durable stitch.
Feed-dog Mechanism: This mechanism moves the fabric along at a pace consistent with the sewing speed, ensuring even and precise stitches.

Motor and Drive Mechanisms: The motor of the machine drives these mechanisms, usually through a series of gears and cams. The motor's rotation is converted into the up-and-down motion of the needle and the movement of the shuttle and feed-dog.

Computerized Machines: Modern sewing machines may include computerized systems that allow for a wide variety of stitch patterns and adjustments, making the process more versatile and user-friendly.

Understanding these basic principles can help in troubleshooting and operating a sewing machine more effectively. Each sewing machine may have specific instructions and features, so consulting the manufacturer’s manual is also recommended for detailed guidance specific to your machine.