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  • Nandi – a sacred bull sculpture

    07/07/2021
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    A massive custom manufacturing job can be more manageable by using laser scanning to construct a CAD model of Nandi – a sacred bull sculpture

    VectraFORM Engineering and Solutions, situated in Coimbatore, Tamil Nadu, is a Creaform Handyscan 3D distributor. In 2008, the business was approached about assisting in creating a Nandi – a sacred bull sculpture — for a well-known spiritual foundation’s Shiva temple. A Nandi is a bull in Hindu mythology that carries the god Shiva and serves as the gatekeeper between Shiva and Parvati. Every Shiva temple, according to tradition, has a Nandi facing the main shrine, and devotees pray to the Nandi first before turning their attention to Lord Shiva.

    Bring Nandi – a sacred bull to life

    The scientists considered scanning living bulls to determine the sacred bull’s 3D shape. However, after considering the inherent problems of working with live animals, they decided to photograph and examine the characteristics of bulls of various ages. The best details from different photographs were combined to create an ideal specimen.

    The temple sculpting crew constructed a plaster of Paris model from the photographs in less than a month, attempting to replicate the position of a bull starting to stand up. The bull is “recognizing the master before him” in this pose, with one foreleg extended. The model was made on a scale of 1:6 and measures about 2′ x 3′ x 4′.

    Nandi – a sacred bull sculpture

    The first model of the bull sculpture was made of plaster of Paris, which was then scanned using a Handyscan 3D laser scanner.

    The project proceeded to the following level after the concept was approved: 3D scanning of the model. A Handyscan 3D scanner was used to scan the plaster model. The resulting CAD model was used to calculate information such as the bull’s weight when created with various wall thicknesses after being extended six times to its actual size.

    The bull’s CAD model was generated by scanning a physical model with a laser.

    The researchers used Geomagic and Rapidform to alter the hump size, head location, and other aspects of the 3D scan data from the plaster model, but the results were not adequate. Rather than looking at a CAD model on a computer screen, the temple priest and the core team preferred to work with a model they could touch. VectraFORM explored employing rapid prototyping or CNC machining to construct a new model that integrated the CAD revisions. Still, the core team decided to make a wax model that could be manually rectified. 

    Post to be continued… 

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