
3. α SERIES PARAMETER ADJUSTMENT B-65150E/04
− 82 −
[Actual adjustment procedure]
Execute the following program, and measure the actual path.
Fig. 3.4.3 (p) Programmed figure
The XY mode (ctrl-X) is used for drawing. To observe an overshoot
along an axis to be stopped, the figure is enlarged in the direction of the
axis to be stopped. Corner 1 and corner 3 in Fig. 3.4.3 (p) are enlarged
in the X-axis direction, and corner 2 and corner 4 are enlarged in the
Y-axis direction. In the examples below, corner 1 is displayed using
0.01 mm/div in the X-axis direction and 0.1 mm/div in the Y-axis
direction.
In Fig. 3.4.3 (q) where a reduced corner feedrate of F1000 is set, an
overshoot of 10 µm or more has occurred. In Fig. 3.4.3 (r), however,
the overshoot is reduced to about 3 µm.
If an overshoot cannot be removed by setting a reduced corner feedrate
close to 0, the acceleration of acceleration/deceleration before
interpolation may be too large. In such a case, set a longer time for
acceleration/deceleration before interpolation. (In this case, a longer
machining time results.)
Fig. 3.4.3 (s) shows the feedrate along the X-axis and Y-axis (corner 1)
when the corner deceleration function is used.
Fig. 3.4.3 (q) Reduced corner feedrate F1000 Fig. 3.4.3 (r) Reduced corner feedrate F300
G91;
G08P1;
G01X10.F4000;
G01Y-20.;
G01X-20.;
G01Y20.;
G01X10.;
G08P0;
G04X3.;
M99;
Start and end point
Corner 1
Corner 2
Corner 3
Corner 4
0.01 mm
Overshoot