Page 163 - Fundamental Of Design In Mechanical Engineering

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 163