Roughing and re-roughing sequences are intended for high
speed mold machining, and for machining imported, non-solid
geometry. You can use these NC sequences to produce more
efficient toolpaths when machining mold cavities or pockets.
Roughing and Re-roughing Sequences
• Roughing – High speed mold machining and machining imported
geometry.
– Remove material inside mill windows.
– Scallop height control.
– Automatic degouging.
– Machine by cavity.
– High speed roughing scans.
– Open and closed area scans.
– Open and closed area entry methods.
– No automatic material removal.
• Re-roughing – Machines where previous roughing could not reach.
– Use manufacturing geometry.
– Typically use smaller tool.
– No removal of scallops between slices.
Figure 1 – Basic Roughing Toolpath
Roughing and Re-roughing Sequences
Figure 2 – Basic Re-Roughing
Toolpath
Roughing and re-roughing sequences are designed for high speed mold
machining, and for machining imported, non-solid geometry. Roughing and
re-roughing sequences can directly machine models containing facet data in
STL format.
• The following features define roughing sequences.
– Remove all material inside a mill window boundary, with additional depth
control based on the depth of the mill window.
– Provide optional scallop height control.
– Perform automatic degouging against all the surfaces of the reference
part.
– Perform zoning by cavity rather than by slice, which means that in case
of multiple cavities the tool completely machines one cavity before
moving to the next.
– Support a variety of high speed roughing scans, with a minimum corner
radius control.
– Enable a selection of different high speed scans for open and closed
areas, assessed on a slice-by-slice basis.
– Provide different entry methods for open and closed areas. The tool
enters open areas from the side. For closed areas, you can specify
either helical or ramp top entry method.
– Do not generate an automatic material removal feature. However, you
can manually create material removal features.
• Re-roughing NC sequences create toolpaths to machine only the areas
where a previous roughing sequence could not reach.
– Typically you perform them with a smaller tool and you machine the
areas that the larger roughing cutter could not enter due to its size.
– They do not attempt to remove scallops left between the slices of the
referenced sequence
