Creating NC Sequences

User's Guide > Production Applications: Manufacturing > Creating Manufacturing Objects > Creating NC Sequences

Header file ProNcseq.h describes the element tree for manufacturing NC sequences.

There are supported NC sequence types:

• PRO_NCSEQ_PROF_SUR_MILL—Profile milling, feature type PRO_FEAT_MILL

• PRO_NCSEQ_VOL_MILL—Volume milling, feature type PRO_FEAT_MILL

• PRO_NCSEQ_CONV_SURF_MILL—Conventional surface, feature type PRO_FEAT_MILL

• PRO_NCSEQ_FACE_MILL—Face milling, feature type PRO_FEAT_MILL

• PRO_NCSEQ_PREV_TOOL_MILL—Local milling using previous tool, feature type PRO_FEAT_MILL

• PRO_NCSEQ_HOLEMAKING—Holemaking, type PRO_FEAT_DRILL

• PRO_NCSEQ_MW_ROTARY_FINISH_MILLING—High speed milling PRO_FEAT_MILL

• PRO_NCSEQ_MW_UNDERCUT_MACHINING—High speed milling PRO_FEAT_MILL

Like workcells, an NC sequence feature has a number of non-redefinable elements. For all NC sequences, the PRO_E_NCSEQ_TYPE and PRO_E_NUM_AXES elements are non-redefinable. For holemaking sequences, the PRO_E_HOLEMAKING_TYPE, PRO_E_PECK_TYPE, and PRO_E_HOLE_CYCLE_TYPE elements are non-redefinable. These elements are specific to holemaking sequences and need not be defined for milling sequences. The following table shows the elements of an NC sequence. In this table, the Value column specifies whether the element is required (R) or optional (O).

Element	Description	Value
Feature type	The feature type	R
Type	The sequence type	R
Operation	Operation to which to add the NC sequence	R
Retraction plane	The retraction plane	R
Tool	The tool	R
Csys	The manufacturing coordinate system	R
Parameters	The manufacturing parameters	R
Name	The name of the NC sequence	O
Number of axes	The number of axes	O
Machine head	The machine head	O
Fixture	The fixture	O
Entities to be machined
Surface	The surface	R
Holes or volume	The holes or volume	R
Start path	The start path	R
End path	The end path	R

The retraction plane that must be defined as part of the NC sequence requires the identifier of the underlying geometry of the datum plane. To obtain this identifier, visit the datum plane geometry items using ProFeatureGeomitemVisit().

There are also a number of required parameters for each NC sequence that must be defined. For conventional milling, the following parameters are required:

• CUT_FEED

• TOLERANCE

• STEP_OVER

• SPINDLE_SPEED

• CLEAR_DIST

For face milling, the following parameters are required:

• CUT_FEED

• STEP_DEPTH

• TOLERANCE

• STEP_OVER

• SPINDLE_SPEED

• CLEAR_DIST

For holemaking, the following parameters are required:

• CUT_FEED

• TOLERANCE

• SPINDLE_SPEED

• CLEAR_DIST

Both milling and holemaking features elements require that the entities (and some associated properties) to be machined are set by API functions, rather than by element tree. Like the standard elements, these functions require a call to ProElementAlloc() to reserve space for the elements. Once the elements are complete, you can add them to the tree like the other standard elements.

Note:

Currently, using ProFeatureElemtreeExtract()with NC sequences yields an element tree without holes or surface elements. In other words, there is no way to retrieve hole set or surface information.

這是否有幫助?