|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).|
|back and forth||Machining in which motion is done
alternately in one direction then the other.
Compare with one way.
|bottom plane||A planar geometric element that represents the bottom surface of an area to machine. It is normal to the tool axis.|
|clearance macro||Motion that involves retracting to a safety plane, a linear trajectory in that plane and then plunging from that plane.|
|climb milling||Milling in which the
advancing tool rotates down into the material. Chips of cut material tend
to be thrown behind the tool, which results to give good surface finish.
Compare with conventional milling.
|conventional milling||Milling in which the
advancing tool rotates up into the material. Chips of cut material tend to
be carried around with the tool, which often impairs good surface finish.
Compare with climb milling.
|DPM||Digital Process for Manufacturing.|
|extension type||Defines the end type of a hole as being through hole or blind.|
|Facing operation||A surfacing operation in which material is removed in one cut or several axial cuts of equal depth according to a pre-defined machining strategy. Boundaries of the planar area to be machined are soft.|
|Fault||Types of faults in material removal simulation are gouge, undercut, and tool clash.|
|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.|
|hard||A geometric element (such as a boundary or a bottom face) that the tool cannot pass beyond.|
|high speed milling (HSM)||Functionality that is supported for Pocketing and Facing operations in which corners and transitions in the tool path are rounded to ensure a smooth and continuous cutting effort.|
|inward helical||Machining in which motion starts from a point inside the domain to machine and follows paths parallel to the domain boundary towards the center of the domain. Compare with outward helical.|
|island||Inner domain of a pocket that is to be avoided during machining. It has a closed hard boundary.|
|linking motion||Motion that involves retracting to a safety plane, a linear trajectory in that plane and then plunging from that plane.|
|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 feature||A feature instance representing a volume of material to be removed, a machining axis, tolerances, and other technological attributes. These features may be hole type or milling type.|
|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.|
|manufacturing view||The set of machining features defined in the part operation.|
|multi-level operation||Milling operation (such as Pocketing or Profile Contouring) that is done in a series of axial cuts.|
|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). Compare with thickness.|
|one way||Machining in which motion is always done in the same direction. Compare with zig zag or back and forth.|
|outward helical||Machining in which
motion starts from a point inside the domain to machine and follows paths
parallel to the domain boundary away from the center of the domain.
Compare with inward helical.
|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.|
|An area to be machined that is defined by a closed boundary and a bottom plane. The pocket boundary may be either open or closed. The pocket definition may also include a top plane and one or more islands.|
|Pocketing operation||A machining operation
in which material is removed from a pocket in one
or several axial cuts of equal depth according to a pre-defined machining
The tool path style is either Inward helical, Outward helical or Back and forth.
|Point to Point operation||A milling operation in which the tool moves in straight line segments between user-defined points.|
|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.|
|Profile Contouring operation||A milling operation in which the tool follows a guide curve and possibly other guide elements while respecting user-defined geometric limitations and machining strategy parameters.|
|retract macro||Motion defined for retracting from the operation end point|
|return macro||Motion for linking between paths or between levels. It involves retracting to a safety plane, a linear trajectory in that plane and then plunging from that plane.|
|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.|
|soft||A geometric element (such as a boundary or a bottom face) that the tool can pass beyond.|
|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.
Compare with offset.
|top plane||A planar geometric element that represents the top surface of an area to machine. It is always normal to the associated tool's rotational axis.|
|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 path that the center of the tool tip follows during a machining operation.|
|total depth||The total depth including breakthrough distance that is machined in a hole making operation.|
|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.