Discussion
Interpolator in a CNC machine
Answer: B
An interpolator coordinates axes movements.
To cut a straight line at an angle, a circular arc or another contour, two or more axes must move at the same time with continuously related velocities. The interpolator (linear, circular or parabolic) computes the intermediate points and feeds coordinated position commands to each axis drive so that the tool follows the programmed path.
Spindle speed is set by the S word and controlled by the spindle drive, the automatic tool changer is a separate machine function, and canned cycles (G81 and the like) are preprogrammed sequences of moves, not the interpolation that generates them.
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