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Holocreators Blog

On the Holocreators Blog, you will find posts about 3D-scanning and reverse engineering. Post topics range from explanations and tutorials to art projects. We illuminate topics from various angles, often with video.
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3D product configurators for online shops

In e-commerce, product returns and conversion rates are crucial. 3D models better communicate the product to the customer, making the shopping experience more exciting and the online shop more efficient. For a 3D online shop, 3D models of all products are needed. These can either be 3D modeled from scratch or created more cost-effectively and truer-to-life with 3D scanning.
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Combining 3D-CT scanner and photogrammetry

We combine the advantages of photogrammetry and 3D CT scanning (computed tomography) to create a highly accurate color 3D scan. Photogrammetry provides the best possible color information, while computed tomography allows us to 3D-scan the object with unparalleled accuracy. Subsequently, the 3D scan data from both techniques are merged.
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  • Art

Creating a 3D Zoetrope with 3D Scanning and 3D Printing

We created a 3D-printed 3D zoetrope to show the blossoming process of a flower. A real lily was 3Dscanned at various stages of bloom. From these 3D scans, we created a 3D animation. From the 3D animation, we 3D printed 15 lilies and arranged them on a round plate. We illuminated the rotating plate with a strobe light to create the illusion of blossoming lilies.
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Wire EDM for cutting metal 3D prints

Wire EDM is a process for cutting metal. It is used to cut metal 3D prints from their base plate. When 3D printing on metal, the printed part becomes one with the base plate on which it is printed. To separate the two without damaging the part, a precise cutting process is needed. This is where wire EDM shines.
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Metal 3D-printing with selective laser melting (SLM)

SLM is a 3D printing process in which metal powder is fused by laser, creating a new object layer by layer. SLM stands for (Selective Laser Melting), which means that the laser selectively melts the metal powder only where the solid material is needed. In the end, the finished object can be removed from the powder bed.
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    IKEA closet repair with 3D scanning and 3D printing

    We digitally repaired the broken clothes rail holder of an IKEA closet and then 3D-printed it in plastic. We first 3D-scanned the original broken part using a 3D CT scanner (computed tomography 3D scanner). Afterward, we reconstructed the 3D scan using reverse engineering and thus repaired it. The finished file was 3D-printed inside a laser sintering 3D printer.
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    • Art

    Creating a 3D Zoetrope with 3D Scanning and 3D Printing

    We created a 3D-printed 3D zoetrope to show the blossoming process of a flower. A real lily was 3Dscanned at various stages of bloom. From these 3D scans, we created a 3D animation. From the 3D animation, we 3D printed 15 lilies and arranged them on a round plate. We illuminated the rotating plate with a strobe light to create the illusion of blossoming lilies.
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    Estimated reading time: mins

    Reverse engineering and error propagation

    Reverse engineering enables us to create a copy of an object. For this purpose, the part is 3Dscanned, then the 3D scan data is converted into a CAD format, and finally, the part is manufactured. All these steps result in noticeable deviations. If an error adds up over multiple steps, then we call this error propagation.
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    What is a Point Cloud?

    A 3D scanner generates a point cloud. Each point in the point cloud is a measurement point that the 3D scanner has detected on the object’s surface. Each point has an XYZ value that determines its position in the coordinate system. In addition to the XYZ coordinates, certain point clouds can also store the color and light intensity of the measurement point. A direction vector can also be assigned to each point—this indicates the direction in which the point is oriented.
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    Lecture on reverse engineering (3D scan and CAD)

    Swann Rack from Holocreators gave a presentation on reverse engineering at the Rapid.tech 3D Congress 2018. Reverse engineering allows an object to be reproduced using 3D scanning and subsequent conversion into a CAD format. In his presentation, Swann Rack talked about the different 3D scanning techniques and how the reverse engineering process works.
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    Deviation analysis (nominal actual comparison)

    We perform a deviation analysis in metrology to compare two 3D models with each other and to document the differences with a false color comparison. The analysis is mainly used in quality assurance to document reverse engineering deviations from the original 3D scan. If we compare the CAD data (nominal state) of a part with the 3D scan (actual state) of the same part, this is called a “nominal actual comparison”.
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