A D E F G M O P R S T U  J


approach macro Motion defined for approaching the operation start point
auxiliary command A control function such as tool change or machine table rotation. These commands may be interpreted by a specific post-processor.
axial machining operation Operation in which machining is done along a single axis and is mainly intended for hole making (drilling, counter boring, and so on). 


DPM Digital Process for Manufacturing.


extension type Defines the end type of a hole as being through hole or blind.

F Top

feedrate Rate at which a cutter advances into a work piece.
Measured in linear or angular units (mm/min or mm/rev, for example).
fixture Elements used to secure or support the workpiece on a machine.


gouge Area where the tool has removed too much material from the workpiece.


machine rotation An auxiliary command in the program that corresponds to a rotation of the machine table.
machining axis system

Reference axis system in which coordinates of points of the tool path are given.

machining operation

Contains all the necessary information for machining a part of the workpiece using a single tool.

machining tolerance

The maximum allowed difference between the theoretical and computed tool path.

manufacturing process

Defines the sequence of part operations necessary for the complete manufacture of a part.

manufacturing program

Describes the processing order of the NC entities that are taken into account for tool path computation: machining operations, auxiliary commands and PP instructions.


offset Specifies a virtual displacement of a reference geometric element in an operation (such as the offset on the bottom plane of a pocket, for example).
An offset value can be greater than, less than, or equal to zero. It is measured normal to the referenced geometry or in a specific direction such as axial or radial.
For example, a 5mm Offset on Contour means that a virtual displacement is applied normal to the contour geometry. A 5mm Axial Part Offset means that a virtual displacement is applied to the part geometry along the tool axis direction.
Compare with thickness
one way Machining in which motion is always done in the same direction. Compare with zig zag.


part operation

Links all the operations necessary for machining a part based on a unique part registration on a machine. The part operation links these operations with the associated fixture and set-up entities.

PP instruction Instructions that control certain functions that are auxiliary to the tool-part relationship. They may be interpreted by a specific post processor.
PPR Process Product Resources.


retract macro Motion defined for retracting from the operation end point


safety plane A plane normal to the tool axis in which the tool tip can move or remain a clearance distance away from the workpiece, fixture or machine.
set up Describes how the part, stock and fixture are positioned on the machine.
spindle speed The angular speed of the machine spindle.
Measured in linear or angular units (m/min or rev/min, for example).
stock Workpiece prior to machining by the operations of a part operation.


thickness Specifies a thickness of material to be removed by machining. A thickness value must be greater than zero and is measured normal to the machined geometry. For example, if a 5mm Finish Thickness is specified on an operation then 5mm of material will be removed during the finish pass.
Compare with offset.
tool axis Center line of the cutter.
tool change An auxiliary command in the program that corresponds to a change of tool.
tool clash Area where the tool collided with the workpiece during a rapid move.
tool path The trajectory that the tool follows during a machining operation.
total depth The total depth including breakthrough distance that is machined in a hole making operation.
turning plane Plane defined by two axes (called axial and radial) of a machining axis system.
Selected geometry must lie on the turning plane.
In the Lathe Machining product, the tool assembly is positioned according to axial and radial axes (usually ZX) as well as the origin of the machining axis system. This is not the case in the Multi-Slide Lathe Machining product. In this case there is one plane per turret.


undercut Area where the tool has left material behind on the workpiece.


zig zag Machining in which motion is done alternately in one direction then the other.  Compare with one way.