
PROGRAMMING
B–64154EN/01
5. FEED FUNCTIONS
53
Cutting feedrate can be controlled, as indicated in Table 5.4.
Table 5.4 Cutting Feedrate Control
Function name
G code Validity of G code Description
Exact stop
G09
This function is valid for specified
blocks only.
The tool is decelerated at the end point of
a block, then an in–position check is
made. Then the next block is executed.
Exact stop
G61
Once specified, this function is valid
until G62 or G64 is specified.
The tool is decelerated at the end point of
a block, then an in–position check is
made. Then the next block is executed.
Cutting mode
G64
Once specified, this function is valid
until G61 or G62 is specified.
The tool is not decelerated at the end point
of a block, but the next block is executed.
mat
Automatic override for
inner corners
G62
Once specified, this function is valid
until G61 or G64 is specified.
When the tool moves along an inner cor-
ner during cutter compensation, override
is applied to the cutting feedrate to sup-
press the amount of cutting per unit of time
so that a good surface finish can be pro-
duced.
Internal circular cutting
feedrate change
G62
This function is valid in the cutter
compensation mode, regardless of
the G code.
The internal circular cutting feedrate is
changed.
NOTE
1 The purpose of in–position check is to check that the servo
motor has reached within a specified range (specified with
a parameter by the machine tool builder). When parameter
NCI (No. 1601#5) is set tool, in–position check is not
executed.
2 Inner corner angle θ: 2°
< θ x α x 178°
(α is a set value)
θ
Workpiece
Tool
Exact stop G09 _ ;
G61 ;
Cutting mode G64 ;
Automatic corner override G62 ;
IP
5.4
CUTTING FEEDRATE
CONTROL
Format