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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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Last updated: 12.06.2020
Explanation

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.

Last updated: 11.06.2020
Explanation

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.

Last updated: 11.06.2020
Explanation

What reverse engineering tools are available? (3D scan + CAD)

With reverse engineering software, a 3D scan can be converted into CAD format—for example, a conversion from STL to STEP. We look at reverse engineering tools from various software companies and discuss the advantages and disadvantages.

Last updated: 10.06.2020
Explanation

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.

Last updated: 10.06.2020
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.

Last updated: 08.06.2020
Explanation

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.

Last updated: 08.06.2020
Explanation

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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Estimated reading time: mins

Last updated: 15.06.2020
Tutorial

How to 3D scan for free?

You only need a mobile phone and some free software to create a free 3D scan. The technique is called photogrammetry. We 3D-scanned the same part twice—once for free and once with a professional 3D scanner—then compared both 3D scans. The result: The free 3D scan has a deviation of only about 0.2mm compared to the professional 3D scan.

Estimated reading time: mins

Last updated: 11.11.2020
Explanation

What is Kitbashing?

Kitbashing is associated with model making. It is composed of the words "Kit" and "Bashing". “Kit” refers to "model kit". So, when a model maker is "kitbashing", he blends parts from different model kits. Similar to a collage. The model maker combines several individual models into an entirely new model.

Estimated reading time: mins

Last updated: 01.08.2020
Explanation

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.

Estimated reading time: mins

Last updated: 02.08.2020
Explanation

What is the difference between NURBs model and a mesh?

A NURBS model consists of points connected by curves. A polygon mesh consists of thousands or millions of small triangles. CAD surface models are usually created using NURBS surfaces, while 3D scans are typically exported as a polygon mesh. The conversion from a polygon mesh to a NURBS model is called "reverse engineering".

Estimated reading time: mins

Last updated: 10.06.2020
Explanation

Combining 3D-CT scanner and photogrammetry

Estimated reading time: mins

Last updated: 01.08.2020
Explanation

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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