
A-78640E
Sheet
Title
Draw
No.
04 Feb.08.’03 Part of (4) is added or modified. Addition of 2.16.5
03 Jul.02.’02 A. Fukumoto Part of (3) is added or modified. T.Endo
02 May.13.’02 A. Fukumoto Addition of Tool Radius control for 5-axis machining etc T.Endo
Ed. Date Design Description
Date Jan.25.’02 Desig. A.Fukumoto Apprv. T.Endo
FANUC Series 16i /18i -TB
Specifications of AI High-Precision Contour Control /
I Nano High-Precision Contour control
134/190
• Continuous linear interpolation
In speed control based on acceleration changes in continuous linear interpolation,
the deceleration speed is obtained from changes to acceleration between the start
and end points of a command block.
When a machining program specifies a curved shape using continuous very
small line segments, the machining program approximates the shape with a
polygonal line because it rounds off specified values to the least input increment.
This rounding error makes acceleration changes larger and therefore can
prevent the cutting speed from increasing especially in short blocks because of
frequent reductions in speed.
If this is the case, setting a larger permissible acceleration change level for each
axis for repeated linear interpolation in parameter No.19523 can increase the
cutting speed.
If a nonzero value is specified in parameter No.19523 for axes for which speed
reduction based on acceleration changes are effective, the setting becomes a
permissible acceleration change level for corners where linear interpolation is
repeated. (Between linear interpolation and circular interpolation operations
and between circular interpolation operations, a setting of parameter No.19522
is effective.)
For an axis for which parameter No.19523 is 0, a setting of parameter No.19522,
that is, an ordinary permissible acceleration change level, becomes effective also
for corners where linear interpolation is repeated.
In transition of linear interpolation R
circular interpolation, speed control
is performed based on a permissible
acceleration change level set in
parameter No.19522 is effective.) .
Linear
interpolation
Circular
interpolation
If linear interpolation is repeated,
speed control is performed based on
a permissible acceleration change
level set in parameter No.19523.
Linear
interpolation