Explain the term “tool chatter” in CNC milling.

Tool chatter refers to a specific type of vibration that occurs during the milling process when there is an inconsistency between the cutting tool and the workpiece. Typically, this phenomenon arises from factors such as improper feed rates, incorrect tool selection, or inadequate tool support, leading to a lack of synchronization in their movements. When the tool vibrates excessively, it can cause poor surface finish, increased tool wear, and can potentially damage both the workpiece and the machine.

Understanding that tool chatter is linked to vibrational issues is critical for operators to diagnose and address problems effectively during the milling operation. By recognizing the signs of chatter, machinists can make necessary adjustments to improve the stability and accuracy of the cutting process, ensuring better results and longer tool life.