3D scanners are optical devices used to create 3D measurements. When you 3D scan an object, you are creating a virtual representation of that object, typically in the form of a point cloud. This point cloud can be reconstructed into a virtual model (e.g. a mesh).
image credit: Creaform Inc.
The 3D scanner that we have in the Maker Multiplex is the Hexagon Absolute Arm 7-Axis 83 series, with a measurement volume of 2.5 m. There are two types of attachments available, probes (with different sizes of tips) and an RS6 laser scanner.
Measurements with the probe are made by physical contact, whereas measurements made by the laser scanner are contactless and use a wide scanning line. The laser scanner has a scan line width of 150 mm and can acquire points at a rate of up to 1.2 million points per second.
The base of the arm is fixed while measuring. Mechanical encoders within the scanning arm itself enable accurate 3D positioning of the measured points. It is also possible to scan larger objects by setting up the arm in different locations.