Page 159 - Fundamental of Engineering Design
P. 159
Digitizing
◦ Is a process of collecting data from physical part
◦ It is used when technical/engineering drawing of object is not
available
◦ Aim is to generate a 3D mapping of a product in the form of CAD file
◦ This process requires acquisition of surface data, which is large
number of points on the product surface
◦ Two type of process which are contact method and non-contact
method
Table 4.1 : Differentiation between contact and non-contact method
Contact Method Non-Contact Method
Requires contact between Uses light as the main tool
component surface and the
measuring tools
Uses Coordinate Measuring Uses white light / laser scanner
Machine(CMM), to scan 3D objects to
electromagnetic generate CAD design
digitizer/sonic digitizer to get
desired coordinate 159
