English Author: Site Editor Publish Time: 2026-01-03 Origin: Site
Steps for setting the tip radius compensation of a CNC lathe
1.Determine the compensation parameter
The radius of the tool tip arc : Set the radius value (such as 0.8mm, 0.4mm, 0.2mm) according to the type of tool (such as external cylindrical tool, internal hole tool) and the machining accuracy requirements (rough/semi-finish/finish).
Tool tip position number : Select the position number based on the cutting direction (for example, T=3 for forward cutting of the outer circle and T=2 for forward cutting of the inner hole).
2.Input the compensation parameter
Enter the compensation table : in the numerical control system, select the "tool compensation" or "tool offset" page.
Set the parameter :
R address : enter the radius value of the tool tip arc (e.g. R0.8).
T address : enter the orientation number (e.g. T0101).
X/Z offset : Input the offset of the tool in the X/Z axis (e.g., X0.1, Z0.2) based on the tool setting result.
3.Programming instruction
To enable compensation : use the G41 (left compensation) or G42 (right compensation) command in the program.
To cancel compensation : Use the G40 command to cancel compensation before the program ends.
4.Precautions
Compensation direction : The G41/G42 instructions must be used in combination with the G00/G01 instructions and cannot be combined with the G02/G03 instructions.
Transition treatment : For complex contours, a reasonable compensation method should be selected (for example, right compensation G42 is required for conical surfaces).
Tool setting verification : Verify the accuracy of the compensation value through trial cutting or a tool setting instrument.
