A design is described herein for rings and for cutting rings for a device used in capsulotomy procedures. A set of ring dimensions can describe a desired height of a ring at each location of the ring. The set of ring dimensions is also associated with an intended wall thickness, and thus is associated with an intended cross-sectional area at each ring location. A wall thickness at each portion of a can vary from the intended wall thickness specified by the set of ring dimensions at various locations of the ring. At these locations, the height of the ring can be varied such that the resulting cross-sectional area of the ring at these locations is substantially similar to the intended cross-sectional area of the ring at the locations.

A cutting control apparatus for a cutting control system includes: machine tools each processing an object to be processed; and cutting control apparatuses controlling the machine tools. The cutting control apparatus includes a weight coefficient obtaining unit configured to obtain a first weight coefficient in accordance with: first weight coefficient information in which a tool model and a first weight coefficient are associated for material information on each of materials; material information; and the tool model; and a revolution speed calculating unit configured to calculate a revolution speed of a tool in accordance with: cutting condition information; cutting speed obtained in accordance with tool information and dimension information; and the first weight coefficient. The first weight coefficient is an average value of values based on a plurality of the first weight coefficients obtained from the plurality of cutting control apparatuses.

Nesting methods and computer-controlled machine tools for cutting one or more objects from a workpiece. The nesting methods aid in minimizing wasted material by assigning efficiently packed, nested locations for each object on the workpiece. The nesting methods assign locations in view of a predetermined stacking order of the objects, thereby preventing issues in subsequent manufacturing steps that would result from a substantial reordering of the objects.