command to create a 'Lofted' B Spline (NURB) surface.
You can specify one or two guide rails (flow lines), and as many cross-sections as you want. The surface
flows smoothly from one section to the next, avoiding ridge lines.www.kxcad.net Home > CAM Index > EdgeCAM Index >
Use the Lofted Curves (Surface menu)
command to create a 'Lofted' B Spline (NURB) surface.
You can specify one or two guide rails (flow lines), and as many cross-sections as you want. The surface
flows smoothly from one section to the next, avoiding ridge lines.
Degree – (Only valid when Guide Rail = None). This is the degree of surface in the 'loft' direction (this is the direction determined by the guide curve). The Degree value must be less than the number of cross section curves. The degree in the cross-section direction is taken from the cross section curves.
The section Creating B Spline Surfaces discusses the effect of the Degree parameter.
Tolerance – This controls to within what limits the command generates the intersections required by the various surface types. For instance, in the cases where a guide rail is required, Tolerance specifies the accuracy with which the cross-sections must meet the guide curves.
Guide Rail – Specify the type of guide rails, if any.
Flow Type – Valid only for the Guide Rail parameter's Central Spine and One Side options.Select from:
Normal – Maintains the cross-section normal to the flow line
Vertical Sections – Maintains the cross-section in a vertical orientation irrespective of whether the flow line is parallel to the current CPL
Parallel Sections – Maintains all cross-sections parallel to the initial cross-section
None – This maintains the cross-sections in the orientation in which they were created.
The Display parameters, and Layer, Colour, Style and Name are the same as for all surface commands.