
7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL B-63783EN-1/01
- 652 -
Example of determining the feedrate from the feedrate difference on each axis
The feedrate at a corner is calculated from the feedrate difference on
each axis, as described below.
he tangent feedrate that does not cause the feedrate change on each axis
to exceed the permissible feedrate difference set for parameter No.
1478 is calculated, and deceleration at performed at the corner.
- Example
When the tool travel direction changes by 90 degrees from the X-axis
to the Y-axis, deceleration is performed as shown below, if the feedrate
is 1000 mm/min and the permissible feedrate difference is 500
mm/min.
Fig. 7.1.14 (b) Example of Determining the Feedrate from the Feedrate
Difference
NOTE
The method of deceleration with the feedrate
difference differs depending on the setting of
parameter FNW (bit 6 of No. 1517). For details,
refer to the section on " Look-ahead acceleration/
deceleration before interpolation " in this manual.
N2
N1 G01 G91 X100. F1000 ;
N2 Y100. ;
N1
Tool path assumed if deceleration
is not performed at the corner
Tool path assumed if deceleration is
performed at the corner
If deceleration is not
performed at the corner
If deceleration is performed
at the corner
N1 N2
Time
N2
Time
Time
Feedrate
F1000
F500
Feedrate on the
X-axis
Feedrate on the
Y- ax i s
Tangent feedrate
Feedrate
F1000
F500
Feedrate
F1000
F500