Chapter Questions
What term describes how the movements of an $\mathrm{N} / \mathrm{C}$ or $\mathrm{CNC}$ machine are controlled?
How are the machine axes identified with relation to the part?
Which input medium is the most commonly used today?
Identify the input media used most frequently with $\mathrm{N} / \mathrm{C}$. Identify two forms of input media for CNC.
What system is used to specify the rectangular coordinates of any location on a part?
Which programming method always starts from a single known reference point for a dimension?
Which programming method relies on the position of the last programmed location for the location of the next detail?
What do the + and - signs before the axis dimension specify?
Briefly explain what each of the following terms means with regard to N/C operation: point-topoint; continuous path; $\mathrm{X}-, \mathrm{Y}$-, and $\mathrm{Z}$-axes.
List three standard tooling items used with numerically controlled machines.