how to generate cnc programme from cad model ?

please tell me how to generate programme for manufacturing a product using cad model?
is there any specific software for program generation ?

3 Answers

Your CNC will require CAM software to generate the tooling paths. CAM software ranges from free to very expensive. You'll want to find a program that works with your CAD data and CNC.
Specific programs include:
MasterCAM, SolidCAM, GibbsCAM, CAMworks, SurfaceCAM, DelCAM,..

This article describes all the steps needed to make a CNC Part from a CAD Model:

http://www.cnccookbook.com/MakeCNCParts/HowToMakeCNCParts.html

There are two forms to make CNC programming: 1) manual and 2) automatic. For making the first people need to know the language of the CNC of the machine. Each CNC machine has a "Programming" manual.

The automatic programming is made with CAD-CAM programs. We take a geometry of CAD design, translate to CAM, and before use the routines inner of CAM for the different types of machining.