This is a very broad description, and there are many possibilities! To help me narrow it down, can you give me more information about the machine? For example:

* What is the purpose of the machine? Is it for measuring, cutting, transporting, or something else?

* What are the circular devices made of? Are they metal, plastic, wood, or something else?

* What are the sizes of the circular devices? Are they large or small?

* How are the circular devices connected? Are they attached to each other, or are they separate?

* Where would you typically find this machine? Is it in a factory, a workshop, a kitchen, or somewhere else?

The more details you can provide, the better chance I have of identifying the machine you're thinking of. 😊