Specifications

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CONCISE GUIDE FANUC 37
3.12 “G41”-“G42”- “G40” TOOL RADIUS OFFSET
All inserts for turning have the cutter edge rounded to a pre-defined radius, specified by the insert
manufacturer (e.g. 0.4; 0.8; 1.2 etc.). With the tool measurement a point is determined for movements
that is not on the insert profile, but is the intersection of the horizontal and vertical lines tangent to the
insert radius, as can be seen in the figure that follows.
This difference has no influence when turning cylindrical parts at 90° but causes an error when machining
conical and /or spherical parts, creating a profile that is not the same as that programmed. The value of
this error is proportional to the insert radius and assumes the maximum value in the case of a conical
profile at 45°:
Error = 0.412 x Insert radius
La tool radius offset è attivata e disattivata nel programma mediante le
seguenti funzioni:
Insert
Turned
Profile
Programmed
profile
Insert