Cnc generally stand for computer numerical control that works through the use of a computer that interprets a fastidious code called a G-Code to produce certain parts. It does the work by cutting away the materials that the code tells it to cut. It has certain parameters that works within the machine and are determined by a software program.
Now let us get into the process, the cnc machining is a specialization process through which special parts are manufactured like gages, tools and several other machine parts. It can be done with its close tolerances or custom-made by the latter costs more. In view of wherewithal, apparatus, workforce one can contract out cnc products through best cnc machine shop.
Basically it involves four steps and they are roughing, semi-roughing, semi-finishing and the complete outcome i.e. the final product.
The design engineer should hold adequate awareness of CNC to faultless dimensioning and tolerance techniques for work pieces to be machined on CNC machines.
Most cnc machines are programmed using cad/cam software.
Basics steps are programming the code, loading the code, running the code, and the final result.
The cnc machine is programmed by generating g and m codes that are identified by the machine it is a must to concentrate on the coding part very well. The g code is a Go code that notifies the engine the specific actions, twists and slices to formulate; on the other hand the M code turns fluids and other extra devices on and off. The codes are generated with a computer aided machining program and the cam program is a part of cad i.e. the computer aided design program where the parts are drafted into the computer to exact specifications.
After the coding part is done the completed code is loaded to get access to the next step. The respective codes are loaded, saved and stored on flash or floppy drives to be shifted to the CNC machine. A large library of codes are stored and used to simplify it on small microprocessors. In other rare cases the cnc machine operator will craft the needed code directly into the machine.
As soon as the codes are bed-in, the CNC machine will tag along all the guidelines given to it in the code. Finally it gets access and the concerned process of drilling and roughing are carried out.