
21
88
A-78710E
Edit
Apprv. Desig.
Sheet
Title
Draw
No.
Date
Design
Descri
tion
Date
FANUC Series 16i –MB, 18i –MB5
Tool Radius Compensation For 5-Axis
machining Specifications
Dec.01.2001
02 Mar.22.2002
T.Mochia All revision
H.Kouzai
Sheet
T.Mochida H.Kouzai
03 Mar.28.2003
MTanaka All revision H.kouzai
04 Aug.05.2003
T.Horie Intersection offset, G-code unification add. H.kouzai
05 Jun.02.2004 Intersection offset(tool rotation type, Mixed type)
2.2 Leading Edge Offset
Leading edge offset is a type of cutter compensation used when a workpiece is
machined with the edge of a tool. The tool is automatically shifted by the amount of
cutter compensation on the line where a plane formed by a tool vector and tool
movement direction meets a plane perpendicular to the tool axis direction.
Tool used
Reference
tool
Cutter compensation
vector
Cutter compensation
amount
Tool center path
(after
compensation)
Programmed
tool path
Tool vector
Fig.2.23 Reading edge offset
Format
・Leading edge offset
G41.3 D_ ;
・Canceling leading edge offset
G40 ;
NOTE
1 G41.3 can be specified only in the G00 and G01 modes. In a block
containing G41.3 or G40, only addresses D, O, and N can be
specified.
2 The block that follows a block containing a G41.3 command must
contain a move command.
In the block after G41.3, however, a tool movement in the same
direction as the tool axis direction or the opposite direction cannot be
specified.
3 No modal G code that belongs to the same group as G00 and G01 can
be specified in the G41.3 mode. If such a modal G code is specified,
alarm P/S 5460 is issued.