2.4. 2.2 Feed Per Minute (G 98 Mode)
(1) Tool feed can be specified in mm/min or
in/rein with F codes .
(2) The feed range that can be programmed
with F codes is as follows.
G 98
Mode F Code Feed Range
Notes :
1. Program feed-per-minute values so that the X-axis speed
ccmponent wi II not exceed half the above upper limit
feedrates.
EXAMPLE
G98 GOI U300. F1200’
—!
(Metric output, metric input)
2. The upper limit value is further subject to the limitation
impoeed by the machine performance. Refer to the
machine tool build&s manual. This upper limit value is
to be set in parameter #6228
Notes :
1.
Do not write F command in FO or negative
values.
2.
Commands in the X-axis direction indicate
speeds in radius.
Example
G98;
GO1 X200. F700 ;
F 700
-!-+
FEEDRATE
700 mm,’mlq
l——————+,
Values of F command at linear or circular
interpolation represent the tangential feed-
rate when two axes are simultaneously con-
trolled.
EXAMPLE 1
G98 ;
GO1 u60.
W40. F500 ;
In this case,
F =
500 = ~3002 + 4002
(mm/min)
~ ~-a~i~
component
Lx-axis component
EXAMPLE 2
G98 ;
G03 X.. . Z.. . 1.. . F200 ;
In this case,
F=200=ifxZ+fz Z
(mm/min)
CENTER
–x
I
2,4.3 AUTOMATIC ACCELERATION AND
DECELERATION
Acceleration and deceleration for rapid traverse
and for cutting feed are automatically performed
without programming ,
2.4. 3.1
Acceleration and Deceleration of Rapid
Traverse and Manual Feed
In the following operation, the pattern of auto-
matic acceleration and deceleration is linear.
(See Fig. 2.3. )
Positioning (GOO)
Manual rapid traverse (RAPID)
Manual continuous feeding (JOG)
Manual HANDLE feeding (HANDLE)
12
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