The accuracy of a CNC machine depends on several factors, some of which are determined by the manufacturer of the CNC machine, and others that can be controlled by the machinist.
In order to achieve accurate part machining, the following factors must be considered.
Machine quality: A well-built machine with high-quality components will usually produce more accurate parts than a low-quality machine.
Machine condition: CNC machines contain a myriad of components, so proper maintenance is critical to maintaining their accuracy.
Tool condition: Dull and worn tools that show signs of rear face wear, crescent pits wear, etc. can reduce the accuracy of CNC machines, so it is important to keep them in good condition. Dull tools also increase cutting temperatures, which is another factor that reduces accuracy.
On-machine inspection: Feedback tools such as on-machine probes can tell the machinist if the machine is cutting accurately during operation.
These tools can also be used to correct any deviations in real time, thereby improving accuracy.
Temperature and humidity: The working environment can affect machining accuracy. Although the machine is capable of cutting parts in warm conditions, thermal consistency must be maintained to avoid deviations.
Calibration: The machine should be calibrated periodically to maintain accuracy.
