
TITLE
er
es
-
,
-
AI contour control function
Specifications
EDIT. DATE DESIG. DESCRIPTION
FANUC LTD
SHEET
5/ 32
DRAW. NO.
A-63512EN
CUST.
2.4 Automatic corner deceleration
The feedrate at a corner is calculated for the axis for which the permissible feedrate difference
between two blocks ( parameter No.1783 ) is exceeded with the highest ratio of actual feedrate
difference to permissible feedrate difference, as shown below. The feedrate is reduced to the
calculated value in the previous block.
When the axis is to move at the specified feedrate F, a comparison is made between the
feedrate change along each axis ( V
X
, V
Y
,... ) and the value ( V
PRM X−
, V
PRM Y−
,... ) specified in
parameter No.1783. If the parameter setting value is exceeded by a feedrate change along any
axis, the axis is decelerated at the corner to the required feedrate F
C
F
C
= F
1
R
max
where R
max
is the largest value of R =
V
V
PRM
R
max
= max
V
V
V
V
X
PRM X
Y
PRM Y−−
, ,...
For example, if the direction of movement is changed from the X-axis to the Y-axis, that is
through 90 degrees, and if the programmed feedrate is 1000 mm/min and the permissible
feedrate difference specified in parameter No.1783 is 500 mm/min, the axis will decelerate as
shown below.