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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With the help of specialized 3D scanners, you can 3D-scan people and animals. This allows you to create 3D models that can be 3D-printed or used for 3D animation. We'll show you three different devices that make such 3D scans possible.
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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.
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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".

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With the help of specialized 3D scanners, you can 3D-scan people and animals. This allows you to create 3D models that can be 3D-printed or used for 3D animation. We'll show you three different devices that make such 3D scans possible.
Estimated reading
time: mins
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
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
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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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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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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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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At Vitronic in Wiesbaden, we tested the 3D body scanner "Vitronic Vitus". This body scanner was developed primarily for the clothing industry to capture people’s body measurements quickly. Besides body measurements, this 3D scanner also captures color information, and thus, established itself for creating 3D figures.
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The Artec Space Spider is a handheld 3D scanner. The cameras on the front look like spider eyes— hence the name "Spider". The 3D scanner is very light and works with blue-structured light. It was developed primarily for 3D scanning smaller objects of between 5 and 30 cm. The manufacturer states the accuracy of the 3D scanner to be within 0.1mm-0.05 mm. Currently, the Artec Space Spider lists for about 20,000 Euro (23,626 USD).
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At an event at the Sustainable Design Center in Berlin, Swann Rack of Holocreators gave a short talk in November 2017. It was about the different 3D scanning techniques and how to use them in combination with 3D printing for reverse engineering.
Estimated reading
time: mins
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.

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