Import Point-Cloud Data
Polygon data is created, using measurement point-cloud data.
Upon polygon generation, polygon reduction, hole filling,
and smoothing are performed simultaneously according to a
specified precision.
| Supported file formats |
ASCII, STL, SWL, AC *,
and other formats can be supported separately. |
Import CAD Data
Measurement point-cloud data alone is enough for spScan to
perform reverse engineering. However, when CAD data for the
object is available, it can be used as a reference for reverse
engineering and/or the data itself can be used for non-reverse
engineering parts (i.e., partial reverse engineering).
Supported CAD file format is JAMA-IS (IGES formulated by Japan
Automobile Manufacturers Association, Inc.). However, by specifying
the original CAD, other IGES files can also be supported.
Coordinate Alignment
When using CAD data, one must be aware that point-cloud data
and CAD data have different coordinate systems. Therefore,
point-cloud data and CAD data must be aligned be for reverse
engineering is performed. The Position Alignment feature is
available in two formats:
| Position Alignment Features |
- Restricting specified elements (Holes, planes, cylinders,
etc.)
- Minimizing marginal error summation between point-cloud
data and CAD data (best-fit).
|
Polygon Modification Features
Using polygon generated from measurement point-cloud data,
polygons can be modified to meet the reverse engineering purpose.
| Main Features |
Partial Deletion, Polygon Thin-Out. Smoothing, Hole-Filling,
Edge Fixing
|
Grouping
By computing polygon curvature, automatic grouping (surface
structure definition) is performed. Curvature radius used
for grouping can be precisely controlled.
Curvature Specification
Curvature Display
 |
Automatic Grouping Definition Result
 |
Boundary Generation
Using polygon curvature group boundaries, boundary curves
for CAD data can be automatically generated. Depending on
the reverse engineering purpose, face subdivision and/or curve
modification can be performed as desired.
Reverse Engineering Face Generation
Surface generation by both automatic or manual means is
available,using boundary information and measured point-cloud
data. In the automated process, spScan will automatically
generate boundary surfaces or trimmed surfaces as necessary.
Base surface types from planes, cylindrical surfaces and free-form
surfaces are available.
Reverse Engineered Face Evaluation
Evaluation of the reverse engineered faces can be done to
ensure the data will serve its purpose.
The main evaluation features include Error Margin Color Mapping
against polygons, Surface-to-surface error margin checking,
Surface-to-surface angle evaluation, and Zebra mapping.
Marginal Error Color Map
 |
Zebra map
 |
* To be developed
|
