
7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL B-63783EN-1/01
- 726 -
Explanation
Optimum torque acceleration/deceleration selects the limited
acceleration curve data set with a parameter on the basis of the axial
movement direction and the acceleration/deceleration state, determines
the permissible acceleration for each axis from the current speed, and
controls the acceleration/deceleration for rapid traverse so that the
permissible acceleration for each axis is not exceeded.
- Setting optimum torque acceleration/deceleration
By setting both FAP, bit 0 of parameter No. 6700, and LRP, bit 4 of
parameter No. 1400, to 1 and setting the reference acceleration
parameter (No. 1671) for any one axis to a non-zero value, as below,
the acceleration/deceleration for rapid traverse in look-ahead
acceleration/deceleration mode will be optimum torque
acceleration/deceleration.
Table 7.2.6 (c) Optimum torque acceleration/deceleration
FAP
6700#0
LRP
1400#4
(linear
positioning)
Reference
acceleration
Bell-shaped
acceleration
change time
Limited
acceleration
curve data
1 1 No.1671 No.1672 See "Setting
limited
acceleration
curve data."
To enable bell-shaped acceleration/deceleration in addition to optimum
torque acceleration/declaration, set the bell-shaped acceleration change
time with parameter No. 1672.
- Non-parameter conditions that must be satisfied
If the following conditions are satisfied as well as the above parameter
conditions, the acceleration/deceleration for rapid traverse will be
optimum torque acceleration/deceleration.
1. The system is in look-ahead acceleration/deceleration mode or in
fine HPCC mode.
2. The conditions under which look-ahead acceleration/deceleration is
performed are satisfied.
If rapid traverse is subject to optimum torque acceleration/deceleration,
post-interpolation acceleration/deceleration does not apply to rapid
traverse.
For details of look-ahead acceleration/deceleration and fine HPCC,
refer to the following:
FANUC Series15i/150i-MB Operator's Manual (Programming)
B-63784EN
- Cases in which optimum torque acceleration/deceleration is disabled
If the parameter settings are such that optimum torque
acceleration/deceleration is disabled or if the non-parameter conditions
are not satisfied, the acceleration/deceleration for rapid traverse will be
post-interpolation acceleration/deceleration.