- In the as-built approach, we make sketches from the cross-sections that will be constrained to align with specific dimensions and shapes.
- We will utilise 3D as-built mesh-fitted surfaces that closely match the scan data.
- Manufacturing errors will be included while modeling.
- The ultimate goal is to achieve the precise and match the CAD to the scan profile.
- As-built methodology proves particularly beneficial for replacing parts currently in use within the assembly or system.
- It promises lower deviation and heightened accuracy in comparison to the original scan.
- The resulting model can be exported as a dump solid model, as IGES, STEP, SAT, & PS to serve manufacturing and mould development purposes.
- Furthermore, modifications can be seamlessly carried out using Geomagic Design X.
Design Intent Technique:
- In the design intent approach, sketches will be constrained by reference to the software’s coordinate system.Geometrical and dimensional constraints will be applied to these sketches.
- To reconstruct the profile of the model, we’ll employ loft or sweep modeling features, incorporating editable sketches.
- While capturing the essence of the design intent, manufacturing errors will be eliminated.
- The ultimate goal is to achieve the original design intent.
- Design Intent methodology is appropriate for new product development.
- Despite the potential for slightly higher deviation, the model retains its proper geometric properties.
- The resulting model features will be transferred to CAD systems, preserving the design history for tasks such as design modifications, drafting, and manufacturing.
- This adaptability extends to both Geomagic Design X and other prevailing CAD systems.
Hybrid Modeling Technique :
- Prismatic shapes will be approached through either the as-built or design intent method, while organic shapes will be handled using the NURBS surface technique.
- Our approach involves the creation of 3D curves, which are subsequently transformed into NURBS patches.
- Manufacturing errors will be taken into account or avoided based on the specific requirements of the end application.
- Our primary objective is to convert the entirety of the scanned data into a CAD model, utilising a combination of NURBS and parametric surfaces.
- The hybrid methodology proves particularly advantageous for objects that exhibit a blend of both freeform and prismatic shapes.
- The resulting model can be exported in various formats, including solid models such as IGES, STEP, SAT, and PS. These exports serve a wide range of purposes, including manufacturing, mould development, CAE simulations, and animation applications.
- Additionally, the approach allows for seamless modifications to be implemented, including the enhancement of NURBS patch quality and adjustments to sketches in reverse engineering software, not in any CAD software.
Scan to CAD NURBS Technique :
- We Convert the point cloud into a NURBS (Non-Uniform Rational B-Spline) representation, which ensures an accurate representation of the object.
- Curves that define the boundaries and features of the surfaces are extracted from the 3D mesh.
- We Generate NURBS patches by fitting them to the extracted curves and the overall 3D scan mesh file. These patches form the basis of the NURBS surface model.
- We can refine the NURBS surface model to achieve higher accuracy and smoothness. This may involve adjusting control points and patch connections.
- NURBS surfaces tend to provide accurate representations of complex organic shapes found in real-world objects.
- The end result is exported in formats such as IGES, STEP, SAT, and PS files. Any necessary modifications can only be carried out using reverse engineering software.
What's next ?
As-Built Technique: In the as-built approach, we make sketches from the cross-sections that will be constrained to align
3D Reverse engineering is a 3D modelling process from the 3D scan that allows us to recreate
The deliverables of 3D scanning and reverse engineering can vary depending on the project’s requirements and end applications.
Introduction: The Freescan Combo 3D scanner is an extraordinary device that combines the utmost metrology-grade precision with a