
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
107/190
(5) Deceleration based on a distance
If the total distance of the blocks read ahead becomes shorter than or equal to
the deceleration distance obtained from the current feedrate, deceleration starts.
If the total distance of the blocks read ahead during deceleration increases,
acceleration is performed.
If the blocks of a small amount of travel are successively specified, deceleration
and acceleration may be performed alternately, making the feedrate inconsistent.
To avoid this, decrease the programmed feedrate.
(6) Single-block commands during look-ahead bell-shaped acceleration/deceleration before
interpolation control
If a single-block command is executed during look-ahead bell-shaped
acceleration/deceleration control, the following control is applied.
(1) If acceleration/deceleration is performed when the single-block command is
executed
(a) If A + B
≤ Remaining amount of travel in the block executed when the
single-block command is executed
Deceleration is performed for a stop so that the feedrate falls to zero at
the point at which the block executed when the single-block command
was executed terminates.
B
Feedrate
Time
Single-block command
A : Amount of travel to a point where the target feedrate is attained and the
current acceleration/deceleration ends
B : Amount of travel corresponding to deceleration from the feedrate
attained at the end of acceleration/deceleration to 0