The PLK Series machine was the first generation of the PLK and used an e-prom for pattern memory. It did not option the ability to make a sewing pattern on the machine. Main sewing parts are available. Electronic components have limited availabilty according to each model.

The PLK-A Series machine was the second generation PLK. It uses a standard floppy disk for pattern memory with an on-board programmer for making sewing patterns. Main sewing parts are available. Electronic components have limited availability according to each model.

The PLK-B Series machine was the third generation PLK. It uses a standard floppy disk for pattern memory as well as an internal memory. The machine was designed with the option of an on-board programmer for making sewing patterns. All sewing parts and electronic components are available.

The PLK-E Series machine is the fourth and current generation of the PLK. It uses a standard floppy disk for pattern memory as well as an internal memory. The machines are equipped with an on-board touch screen for making sewing patterns and customizing parameters. All sewing parts and electronic components are available.