Tool Nose Radius = TNR

Tool nose radius

• An offset feature used on turning center that slightly shifts the tool path for a round tip on an insert during multi-axis operation

• The X and Z axis of tool create a square point and most of tools for turning have radii

TNR

• X and Z tool offsets to the tool change• Size of the TNR Standard radii are: 1/64 or .01561/32 or .03123/64 or .0469

• Tool nose vector• The tool tip of single pointed tool has specific

location from the center of the TNR• The tool nose vector indicates this location to

the controller(P320)

TNR compensation

• G code activating TNR compensation is entered as a separate block in the program G41, G42

TNR

Circular interpolation

• Direct Arc Programing line:• Direction G 03, • N010 G03 x2.00 Z -0.50 R 0.50

Circular interpolation

Direct Arc Programing line:Direction G 02,

Circular interpolation example