
3. αiS/αiF/βiS SERIES PARAMETER ADJUSTMENT B-65270EN/05
- 86 -
(b) Adjusting the time constant in cutting feed
In automatic corner deceleration, the feedrate at which the tool moves
along a corner is reduced according to the permissible acceleration set
for acc./dec. before interpolation. When the automatic corner
deceleration function is used, the tangential feedrate at the corner
changes in a V-shaped manner as shown below. As the permissible
acceleration for acc./dec. before interpolation is decreased,
deceleration at the corner becomes smoother, therefore, the contour
error at the corner can be decreased.
[Parameter window main screen] [Acc./dec. + AI contour control 2 (when AI
contour control II is used)]
If the contour error at the corner cannot be reduced even by adjusting
the permissible feedrate difference, increase the time constant of
acc./dec. before interpolation.
When bell-shaped Acc/Dec. before interpolation is used, contour
errors not only at corners but also rounded corners may be improved.
Note that, however, a larger time constant extends the total machining
time.
Position path
Tangential feedrate indication
Indication of feedrate along each axis
Feedrate alon
X-axis
Feedrate alon
Y-axis
F3000
Linear part
F3000
Corner: F500
BC
D
X
Y