approach

A small distance that the cutting tool travels before engaging the workpiece. The approach distance is added for safety reasons.

CAD/CAM

Computeraided design/computeraided manufacturing. CAD/CAM software helps programmers to efficiently design parts and generate part programs.

circular interpolation

A circular path that requires multiaxis tool movement. Full arcs and partial arcs require circular interpolation.

cosine

In a right triangle, the ratio of the length of the side adjacent to the angle divided by the hypotenuse.

full arc

A portion of a circle that forms an angle measuring exactly 90 degrees.

hypotenuse

In a right triangle, the side located opposite the right angle. The hypotenuse is always the longest side.

I and K method

A method for programming circular interpolation that uses an I code and a K code to indicate the coordinate location of the arc center.

leading edge

The portion of the tool nose that contacts a line parallel to the Xaxis or Zaxis.

linear interpolation

A straightline path that requires tool movement along more than one axis at once. Chamfers and tapers require linear interpolation.

partial arc

A portion of a circle that forms an angle measuring less than 90 degrees.

R method

A method for programming circular interpolation that uses an R code to indicate the size of the radius that forms the arc.

ramping

A tool movement that gradually engages the cutting tool with the workpiece.

right triangle

A triangle containing one angle that measures exactly 90 degrees.

sine

In a right triangle, the ratio of the length of the side opposite the angle divided by the hypotenuse.

tangent

In a right triangle, the ratio of the length of the side opposite the angle divided by the adjacent side.

tool nose radius

The rounded tip on the cutting edge of a singlepoint tool. The greater the nose radius, the greater the degree of roundness at the tip.

tool nose radius compensation

An offset feature used on a turning center that slightly shifts the toolpath for the rounded tip of an insert during contouring, chamfering, and other multiaxis operations.

toolpath

The series of coordinate positions that determine the movement of a tool during a machining operation.

trigonometry

The branch of mathematics that addresses the measurements and relationships of a triangle and its parts.

Xaxis

The linear axis that determines the size of the part's radius or diameter.

Zaxis

The linear axis that determines the size of the part's length from the face to the base.
