
B–63523EN–1/03
5. AUTOMATIC OPERATION
651
NC commands can be used to control a feedrate in continuous cutting feed
blocks as described below.
The tool is decelerated in a block specifying G09, and an in–position
check (*1) is performed. When the feed motor falls in–position, the tool
is moved by the next block. This function may be used to produce a sharp
edge at the corner of a workpiece.
When G61 is commanded, deceleration of cutting feed command at the
end point and inposition check is performed per block thereafter. This
G61 is valid until G62 (automatic corner override), G63 (tapping mode),
or G64 (cutting mode), is commanded.
When G63 is commanded, feed rate override is ignored (always regarded
as 100%), and feed hold also becomes invalid. Cutting feed does not
decelerate at the end of block to transfer to the next block. This G63 is
valid until G61 (exact stop mode), G62 (automatic corner override), or
G64 (cutting mode) is commanded.
When G64 is commanded, deceleration at the end point of each block
thereafter is not performed and cutting goes on to the next block. This
command is valid until G61 (exact stop mode), G62 (automatic corner
override), or G63 (tapping mode) is commanded.
However, in G64 mode, feed rate is decelerated to zero and in–position
check is performed in the following case;
1) Positioning mode (G00, G60)
2) Block with exact stop check (G09)
3) Next block is a block without movement command
*1 The term in–position indicates that the servo motor reaches in a range
of positions specified by a parameter. See Section 7.2.6.1 and 7.2.6.2
for details.
(Example) Tool paths from block (1) to block (2)
In–position check
(1)
(2)
Y
0X
Tool path in the exact stop mode
Tool path in the cutting mode or
tapping mode
5.9
EXACT STOP/
EXACT STOP MODE/
TAPPING MODE/
CUTTING MODE
(M SERIES)
General
D Exact stop (G09)
D Exact Stop Mode (G61)
D
Tapping Mode (G63)
D Cutting Mode (G64)