
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
119/190
2.24.2 Description
Optimum torque acceleration/deceleration selects the acceleration pattern set
with parameters on the basis of the axial movement direction and the
acceleration/deceleration state, determines the acceleration for each axis from
the current speed, and controls the tangential acceleration/deceleration for rapid
traverse in AI HPCC / AI NANO HPCC mode.
• Calculation of the reference acceleration
The reference acceleration is the standard acceleration to set the acceleration
pattern, usually this is the same as the acceleration for rapid traverse at the
selecting a motor.
)traverserapidofConstantTimeAcc/Dec(601773.
)ratetraverseRapid(10001420.
]sec/[onaccelerati Reference
2
×
×
=
No
No
mm
The same value as parameter No.1620 is set in parameter No.1773 usually.
• Setting optimum torque acceleration/deceleration
By setting both FAP, bit 0 of parameter No. 19540, and FRP, bit 5 of parameter
No. 19501, to 1 and setting parameter to determine the reference acceleration
(No. 1420 and No.1773 ) as below, the acceleration/deceleration for rapid
traverse in AI HPCC / AI NANO HPCC mode will be optimum torque
acceleration/deceleration. When Optimum torque acceleration/deceleration is
enabled, linear type positioning for rapid traverse is selected automatically in AI
HPCC / AI NANO HPCC mode even if the parameter LRP, bit 1 of parameter No.
1401, is set to 0 (nonlinear type is selected). If rapid traverse is subject to
optimum torque acceleration/deceleration, after-interpolation
acceleration/deceleration does not apply to rapid traverse.
Table.2.24 (a) Optimum torque acceleration/deceleration
FAP
19540#0
FRP
19501#5
Reference
accelera-
tion
Bell-shaped
acceleration
change time
Acceleration
pattern
11
Before-
interpolation
acc/dec
for rapid
traverse
No.1420
&
No.1773
No.1774 See "Setting
acceleration pattern
data"
To enable bell-shaped acceleration/deceleration in addition to optimum torque
acceleration/declaration, set HRB, bit 0 of parameter No. 19504 to 1and the
bell-shaped acceleration change time with parameter No.1774 .