
3. α SERIES PARAMETER ADJUSTMENT B-65150E/04
− 76 −
Fig. 3.4.3 (f) Specified path and actual path
Actual path
Specified path
[Actual adjustment]
Make a velocity feed-forward coefficient adjustment by using a
square figure with four 1/4 arcs of a 5-mm radius. In this
adjustment, disable the velocity clamp function based on an arc
radius. (Disable the function, or in the example below, ensure that
a velocity equal to or greater than F4000 can be specified.)
Press the uppercase character P to enable the display of a reference path.
Execute the program and measure an actual path. Then, an actual path
and reference path are drawn simultaneously as shown below.
When advanced preview feed-forward is disabled, a
figure error of hundreds
µ
m occurs as shown in Fig.
3.4.3 (f), and therefore can be viewed even in the XY
mode. However, if advanced preview feed-forward is
enabled for figure error reduction, it is difficult to
evaluate a figure error correctly unless the error is
enlarged.
In such a case, use the figure comparison mode (contour
mode) for enlarging errors only for display (ctrl O).
In addition, set an error display magnification with F3
(scale change). For Fig. 3.4.3 (g), a display
magnification of 100 is set.
G91;
G08P1;
G01X10.F4000;
G02X5.Y-5.R5.;
G01Y-20.;
G02X-5.Y-5.R5.;
G01X-20.;
G02X-5.Y5.R5.;
G01Y20.;
G02X5.Y5.R5.;
G01X10.;
G08P0;
G04X3.;
M99;
Fig. 3.4.3 (e) Programmed figure
5 mm
5 mmStart, End