The Importance of G-code and M-code Knowledge
G- and M-codes are the fundamental building blocks with which all modern CNC machine centers’ programs are built and knowing those codes can be the difference between profit and losses out in the shop. A major need for G- and M-code knowledge comes from the increasing dependence on CAD/CAM software (Computer Aided Drawing and Computer Aided Manufacturing), but these software can also limit the capability of the machines in the shop as they are not able to also meet the need of the components being machined.
The time that can be added to set up or run of a particular workpiece can quickly double and triple if a CAM software must be utilized every time there is edit needed on the program. While this added time can be reduced if not eliminated if the machinists running the workpiece have the ability to read the program and understand what the machine will do in each of the blocks of the program. The optimization that a knowledgeable machinist can bring to the table can also be invaluable to the shop considering that the CAM software has a high likelihood to not create the fastest and most efficient tool path for machining a part of the lathe or mill. This likelihood increases with the complexity of the component, but again an experienced machinist would be able to identify the places in the program that can be change to quicken the cycle time or utilize the tools and machines to its limits.
While not all machine controls run off the exact same G-codes and M-codes, machinists with even basic knowledge can translate knowledge of the codes on one machine to other with a small amount of time and effort on their part. M-codes are more likely to vary from machine to machine based on the features of the machine center that is being utilized. G-codes are for the most part going to be the same with exception of specialty features of some machine centers.
G-code and M-code knowledge is the reason behind the need for highly-skilled staff when manufacturing high precision components in many different industries which is why Marples Gears employs top machinists to manufacture our components.
