Zigzag machines are divided into two categories?

There are hundreds of ways you can divide them :

short arm, long arm
heavy duty, light duty
foreign made, domestic made
et al.

Full atuomatic and semiautomatic

Zigzag machines are sewing machines that can create a zigzag stitch. They are commonly used for various sewing tasks such as creating decorative stitches, appliques, and finishing edges.

To answer your question, the two main categories of zigzag machines are mechanical zigzag machines and computerized zigzag machines. Here's how you can differentiate between the two:

1. Mechanical Zigzag Machines: These machines are operated manually and typically do not have electronic components. To create a zigzag stitch, you manually adjust the stitch width and length dials on the machine. These machines are generally less expensive and more straightforward to use. They are suitable for basic zigzag stitching needs and simpler sewing projects.

2. Computerized Zigzag Machines: These machines have built-in computer systems that offer additional features and functionalities. You can control the zigzag stitch width, length, and other parameters through a digital display or touch screen. Computerized zigzag machines often have more stitch options, including a wide variety of decorative stitches and embroidery designs. They may also have automatic tension control, thread cutting, and many other advanced features. These machines are generally more expensive and suitable for those who require more versatility and precision in their sewing projects.

While these are the two main categories, it's worth noting that there are also hybrid models available in the market. These machines combine some mechanical elements with computerized functions, offering a balance between simplicity and advanced features.

When choosing a zigzag machine, consider your budget, the complexity of the projects you plan to work on, and your sewing skill level. It's also helpful to read reviews and do some research to find a machine that suits your specific needs and preferences.