2.3.6 X-AXIS DIAMETER/RADIUS SWITCHING
Addresses X and U for X–axis coordinate words
are specified by diameter value.
This is called
diameter designation.
The addresses X can be
used for designation of both diameter and
radius .
The switching is made by the setting
of parameter #6006D s.
o: Diameter designation
1: Radius designation
I I
w-zPP+z
(a) In the case of Di-
(b) In the case of ra-
ameter Designation
dius Designation
Fig. 2.2
Table 2.6
Diameter Radius
Programming
Programming
Address X command
I
Diameter value
~
Radius value
I
Diameter incre-
Address U command
mental value ~ ~dius value
1 Incremental value
X-axis position display
I
Diameter value
t
Tool position offset
value
I
Diameter value
Nose radius R
1
Radius value
t
Feedrate F, E in
I
Radius val uehev
“-*-”-
X-axis direction
Radius value/rein
Radius data 1,
R for circular
Radius value
interpolation
G90-G 94,
G70-G76,
Parameters for
Radius value
cornering, and
multlple cornering,
D, 1, K, P, Q, R
2.4 RAPID TRAVERSE RATE
2. 4.1 RAPID TRAVERSE RATE
The rapid traverse motion is used for the motion
for the Positioning (GOO) and for the motion for
the Manual Rapid Traverse (RAPID) . The trav-
erse rates differ among the axes since they are
dependent on the machine specification and are
determined by the machine tool builders. The
rapid traverse rates determined by the machine
are set by parameters in advance for individual
axes.
When the tool is moved in rapid traverse in
each axial direction simultaneously, motions in
these axial directions are independent of each
other,
and the end points are reached at differ-
ent times among these motions.
Therefore,
motion paths are normally not straight.
For override rapid traverse rates, Fo, 25%
50% and 100% of the basic rapid traverse rates,
are available.
Fo is a constant feedrate set by a
parameter (#6231) .
Range of Rapid Traverse Rate
(1) For each axis, rapid traverse rates can be
set by parameters #6280, #6281 at some
suitable multiple of 125 p /sec.
(p:
Least output increment)
(2) The rapid traverse rate can be set to the
uPPer limit shown below.
Metric Input
I 24,000 mmlmin
i
Inch Input
I
2,400 inlmin
The upper limit for X-axis speed is half the
listed values. The optimum value of upper
limit is set according to the machine.
Refer to the machine tool builder’s manual,
for the definite value.
2.4.2
FEED FUNCTION (F- AND E-FUNCTION)
G code listed below must be designated before F ,
and E function is commanded.
G code I
Function
G 98
Designation of feedrate in mm/min.
G99
Designation of feedrate in mm/rev.
Note : For the details, refer to 2.8.28, “Feed Function
Design ation.”
Since F, E codes are modal, these codes are
effective until next F , E codes are given.
However, when G98/G99 are switched, new F
code must be designated.
In G98 mode, E code cannot be commanded. If
commanded, PROG ERROR “030” will be activated.
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