18-04-2012, 11:48 AM
WORKSHOP TECHNOLOGY AND COORDINATE MEASURING
SHIVFINAL5.PPT (Size: 4.46 MB / Downloads: 53)
Selection of Process depends on
Dimensional and surface finish requirements
Operational Cost
Design and strength requirements
Consequences of various methods
NC AND CNC Center
Numerical control (NC) machines are those machines, automatically operated by commands that are received by their processing units
CNC Machines
programmed computer to perform some or all of the basic numerical control functions.
Most of the CNC systems use a microcomputer system based controller unit because of down sizing of computer.
As compared to NC, the CNC offers additional flexibility and computational capability.
Components
The machine itself
many types
strong granite base
precision engineering
The measuring probe
electronic touch
all shapes and sizes
Capabilities of cmm
Linear, angular dimension measurement
Geometrical parameter
2d & 3d profile measurement
Digitizing
Interface with CAD files
Scanning through VAST-XT probe