
A-78640E
Sheet
Title
Draw
No.
04 Feb.08.’03 Part of (4) is added or modified. Addition of 2.16.5
03 Jul.02.’02 A. Fukumoto Part of (3) is added or modified. T.Endo
02 May.13.’02 A. Fukumoto Addition of Tool Radius control for 5-axis machining etc T.Endo
Ed. Date Design Description
Date Jan.25.’02 Desig. A.Fukumoto Apprv. T.Endo
FANUC Series 16i /18i -TB
Specifications of AI High-Precision Contour Control /
I Nano High-Precision Contour control
64/190
2.17.3 Description
• Start-up
In offset cancel mode, issuing a command of tool radius compensation for 5-axsi
machining (G41.5 or G42.5 with a D code other than D0) causes the CNC to enter
offset mode.
Startup may be specified with positioning (G00) or linear interpolation (G01).
If, during startup, an attempt is made to issue a G code other than G00 and G01,
such as circular interpolation (G02 or G03) an alarm(P/S034) will be issued.
• Offset mode cancellation
In offset mode, executing a block satisfying either or both of the following
conditions causes the CNC to enter offset cancel mode:
1 G40 is specified.
2. 0 is specified as the code for specifying the amount of cutter compensation
(D code).
The command used to perform offset cancellation must be G00 or G01, not any
other G code such as a circular interpolation command (G02 or G03). Otherwise,
an alarm(P/S034) will be issued.
• Operation at compensation start-up and cancellation
(1) Type A (Parameter No.5003#0(SUP)=0)
Type A operation is similar to cutter compensation as shown below.
Tool
G41.2
G40
:Tool center path
:Programmed tool path
Operation in linear interpolation
:Tool center path
:
Programmed tool path
Tool
G42.2
G40
Operation in circular interpolation
Fig. 2.17.3(a) Operation at compensation start-up and cancellation
(Type A)